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Date: Tue, 27 Nov 2018 20:17:59 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
torvalds@...ux-foundation.org, stable@...r.kernel.org
Cc: lwn@....net, Jiri Slaby <jslaby@...e.cz>
Subject: Re: Linux 4.4.165
diff --git a/.gitignore b/.gitignore
index fd3a35592543..34fe1346aa87 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,6 +33,7 @@
*.lzo
*.patch
*.gcno
+*.ll
modules.builtin
Module.symvers
*.dwo
diff --git a/Kbuild b/Kbuild
index f55cefd9bf29..f56ed561a284 100644
--- a/Kbuild
+++ b/Kbuild
@@ -6,31 +6,6 @@
# 3) Generate asm-offsets.h (may need bounds.h and timeconst.h)
# 4) Check for missing system calls
-# Default sed regexp - multiline due to syntax constraints
-define sed-y
- "/^->/{s:->#\(.*\):/* \1 */:; \
- s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
- s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
- s:->::; p;}"
-endef
-
-# Use filechk to avoid rebuilds when a header changes, but the resulting file
-# does not
-define filechk_offsets
- (set -e; \
- echo "#ifndef $2"; \
- echo "#define $2"; \
- echo "/*"; \
- echo " * DO NOT MODIFY."; \
- echo " *"; \
- echo " * This file was generated by Kbuild"; \
- echo " */"; \
- echo ""; \
- sed -ne $(sed-y); \
- echo ""; \
- echo "#endif" )
-endef
-
#####
# 1) Generate bounds.h
diff --git a/Makefile b/Makefile
index 9382e7e4e750..441a760dc5a4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
VERSION = 4
PATCHLEVEL = 4
-SUBLEVEL = 164
+SUBLEVEL = 165
EXTRAVERSION =
NAME = Blurry Fish Butt
@@ -303,14 +303,9 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
HOSTCC = gcc
HOSTCXX = g++
-HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
+HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
HOSTCXXFLAGS = -O2
-ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
-HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
- -Wno-missing-field-initializers -fno-delete-null-pointer-checks
-endif
-
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
@@ -612,6 +607,22 @@ endif # $(dot-config)
# Defaults to vmlinux, but the arch makefile usually adds further targets
all: vmlinux
+ifeq ($(cc-name),clang)
+ifneq ($(CROSS_COMPILE),)
+CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
+GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD)))
+CLANG_PREFIX := --prefix=$(GCC_TOOLCHAIN_DIR)
+GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
+endif
+ifneq ($(GCC_TOOLCHAIN),)
+CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
+endif
+KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
+KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
+KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
+KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
+endif
+
# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
# values of the respective KBUILD_* variables
ARCH_CPPFLAGS :=
@@ -628,7 +639,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
KBUILD_CFLAGS += $(call cc-disable-warning, attribute-alias)
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS += -Os
+KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
else
ifdef CONFIG_PROFILE_ALL_BRANCHES
KBUILD_CFLAGS += -O2
@@ -699,10 +710,9 @@ KBUILD_CFLAGS += $(stackp-flag)
ifeq ($(cc-name),clang)
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
-KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
-KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
+KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
# Quiet clang warning: comparison of unsigned expression < 0 is always false
KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
@@ -713,11 +723,11 @@ KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
else
# These warnings generated too much noise in a regular build.
-# Use make W=1 to enable them (see scripts/Makefile.build)
+# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
-KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
endif
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
ifdef CONFIG_FRAME_POINTER
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
else
@@ -1297,6 +1307,8 @@ help:
@echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
@echo ' dir/ - Build all files in dir and below'
@echo ' dir/file.[ois] - Build specified target only'
+ @echo ' dir/file.ll - Build the LLVM assembly file'
+ @echo ' (requires compiler support for LLVM assembly generation)'
@echo ' dir/file.lst - Build specified mixed source/assembly target only'
@echo ' (requires a recent binutils and recent build (System.map))'
@echo ' dir/file.ko - Build module including final link'
@@ -1472,6 +1484,7 @@ clean: $(clean-dirs)
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-o -name '*.symtypes' -o -name 'modules.order' \
-o -name modules.builtin -o -name '.tmp_*.o.*' \
+ -o -name '*.ll' \
-o -name '*.gcno' \) -type f -print | xargs rm -f
# Generate tags for editors
@@ -1575,6 +1588,8 @@ endif
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.symtypes: %.c prepare scripts FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+%.ll: %.c prepare scripts FORCE
+ $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
# Modules
/: prepare scripts FORCE
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index b6c90e5006e4..c10bb98144b0 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -56,6 +56,10 @@ else
TEXT_OFFSET := 0x00080000
endif
+ifeq ($(cc-name),clang)
+KBUILD_CFLAGS += $(call cc-disable-warning, asm-operand-widths)
+endif
+
# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
# in 32-bit arithmetic
KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
diff --git a/arch/arm64/crypto/sha1-ce-core.S b/arch/arm64/crypto/sha1-ce-core.S
index c98e7e849f06..8550408735a0 100644
--- a/arch/arm64/crypto/sha1-ce-core.S
+++ b/arch/arm64/crypto/sha1-ce-core.S
@@ -82,7 +82,8 @@ ENTRY(sha1_ce_transform)
ldr dgb, [x0, #16]
/* load sha1_ce_state::finalize */
- ldr w4, [x0, #:lo12:sha1_ce_offsetof_finalize]
+ ldr_l w4, sha1_ce_offsetof_finalize, x4
+ ldr w4, [x0, x4]
/* load input */
0: ld1 {v8.4s-v11.4s}, [x1], #64
@@ -132,7 +133,8 @@ CPU_LE( rev32 v11.16b, v11.16b )
* the padding is handled by the C code in that case.
*/
cbz x4, 3f
- ldr x4, [x0, #:lo12:sha1_ce_offsetof_count]
+ ldr_l w4, sha1_ce_offsetof_count, x4
+ ldr x4, [x0, x4]
movi v9.2d, #0
mov x8, #0x80000000
movi v10.2d, #0
diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c
index aefda9868627..ea319c055f5d 100644
--- a/arch/arm64/crypto/sha1-ce-glue.c
+++ b/arch/arm64/crypto/sha1-ce-glue.c
@@ -17,9 +17,6 @@
#include <linux/crypto.h>
#include <linux/module.h>
-#define ASM_EXPORT(sym, val) \
- asm(".globl " #sym "; .set " #sym ", %0" :: "I"(val));
-
MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@...aro.org>");
MODULE_LICENSE("GPL v2");
@@ -32,6 +29,9 @@ struct sha1_ce_state {
asmlinkage void sha1_ce_transform(struct sha1_ce_state *sst, u8 const *src,
int blocks);
+const u32 sha1_ce_offsetof_count = offsetof(struct sha1_ce_state, sst.count);
+const u32 sha1_ce_offsetof_finalize = offsetof(struct sha1_ce_state, finalize);
+
static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
@@ -52,11 +52,6 @@ static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
struct sha1_ce_state *sctx = shash_desc_ctx(desc);
bool finalize = !sctx->sst.count && !(len % SHA1_BLOCK_SIZE);
- ASM_EXPORT(sha1_ce_offsetof_count,
- offsetof(struct sha1_ce_state, sst.count));
- ASM_EXPORT(sha1_ce_offsetof_finalize,
- offsetof(struct sha1_ce_state, finalize));
-
/*
* Allow the asm code to perform the finalization if there is no
* partial data and the input is a round multiple of the block size.
diff --git a/arch/arm64/crypto/sha2-ce-core.S b/arch/arm64/crypto/sha2-ce-core.S
index 01cfee066837..679c6c002f4f 100644
--- a/arch/arm64/crypto/sha2-ce-core.S
+++ b/arch/arm64/crypto/sha2-ce-core.S
@@ -88,7 +88,8 @@ ENTRY(sha2_ce_transform)
ld1 {dgav.4s, dgbv.4s}, [x0]
/* load sha256_ce_state::finalize */
- ldr w4, [x0, #:lo12:sha256_ce_offsetof_finalize]
+ ldr_l w4, sha256_ce_offsetof_finalize, x4
+ ldr w4, [x0, x4]
/* load input */
0: ld1 {v16.4s-v19.4s}, [x1], #64
@@ -136,7 +137,8 @@ CPU_LE( rev32 v19.16b, v19.16b )
* the padding is handled by the C code in that case.
*/
cbz x4, 3f
- ldr x4, [x0, #:lo12:sha256_ce_offsetof_count]
+ ldr_l w4, sha256_ce_offsetof_count, x4
+ ldr x4, [x0, x4]
movi v17.2d, #0
mov x8, #0x80000000
movi v18.2d, #0
diff --git a/arch/arm64/crypto/sha2-ce-glue.c b/arch/arm64/crypto/sha2-ce-glue.c
index 7cd587564a41..0ed9486f75dd 100644
--- a/arch/arm64/crypto/sha2-ce-glue.c
+++ b/arch/arm64/crypto/sha2-ce-glue.c
@@ -17,9 +17,6 @@
#include <linux/crypto.h>
#include <linux/module.h>
-#define ASM_EXPORT(sym, val) \
- asm(".globl " #sym "; .set " #sym ", %0" :: "I"(val));
-
MODULE_DESCRIPTION("SHA-224/SHA-256 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@...aro.org>");
MODULE_LICENSE("GPL v2");
@@ -32,6 +29,11 @@ struct sha256_ce_state {
asmlinkage void sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src,
int blocks);
+const u32 sha256_ce_offsetof_count = offsetof(struct sha256_ce_state,
+ sst.count);
+const u32 sha256_ce_offsetof_finalize = offsetof(struct sha256_ce_state,
+ finalize);
+
static int sha256_ce_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
@@ -52,11 +54,6 @@ static int sha256_ce_finup(struct shash_desc *desc, const u8 *data,
struct sha256_ce_state *sctx = shash_desc_ctx(desc);
bool finalize = !sctx->sst.count && !(len % SHA256_BLOCK_SIZE);
- ASM_EXPORT(sha256_ce_offsetof_count,
- offsetof(struct sha256_ce_state, sst.count));
- ASM_EXPORT(sha256_ce_offsetof_finalize,
- offsetof(struct sha256_ce_state, finalize));
-
/*
* Allow the asm code to perform the finalization if there is no
* partial data and the input is a round multiple of the block size.
diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h
index 8a336852eeba..aea904713d0f 100644
--- a/arch/arm64/include/asm/percpu.h
+++ b/arch/arm64/include/asm/percpu.h
@@ -84,6 +84,7 @@ static inline unsigned long __percpu_##op(void *ptr, \
: [val] "Ir" (val)); \
break; \
default: \
+ ret = 0; \
BUILD_BUG(); \
} \
\
@@ -113,6 +114,7 @@ static inline unsigned long __percpu_read(void *ptr, int size)
ret = ACCESS_ONCE(*(u64 *)ptr);
break;
default:
+ ret = 0;
BUILD_BUG();
}
@@ -182,6 +184,7 @@ static inline unsigned long __percpu_xchg(void *ptr, unsigned long val,
: [val] "r" (val));
break;
default:
+ ret = 0;
BUILD_BUG();
}
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index 3686d6abafde..9edda5466020 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -50,32 +50,10 @@ CFLAGS_traps.o += -mfixed-range=f2-f5,f16-f31
# The gate DSO image is built using a special linker script.
include $(src)/Makefile.gate
-# Calculate NR_IRQ = max(IA64_NATIVE_NR_IRQS, XEN_NR_IRQS, ...) based on config
-define sed-y
- "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
-endef
-quiet_cmd_nr_irqs = GEN $@
-define cmd_nr_irqs
- (set -e; \
- echo "#ifndef __ASM_NR_IRQS_H__"; \
- echo "#define __ASM_NR_IRQS_H__"; \
- echo "/*"; \
- echo " * DO NOT MODIFY."; \
- echo " *"; \
- echo " * This file was generated by Kbuild"; \
- echo " *"; \
- echo " */"; \
- echo ""; \
- sed -ne $(sed-y) $<; \
- echo ""; \
- echo "#endif" ) > $@
-endef
-
# We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/kernel/nr-irqs.s: arch/$(SRCARCH)/kernel/nr-irqs.c
$(Q)mkdir -p $(dir $@)
$(call if_changed_dep,cc_s_c)
-include/generated/nr-irqs.h: arch/$(SRCARCH)/kernel/nr-irqs.s
- $(Q)mkdir -p $(dir $@)
- $(call cmd,nr_irqs)
+include/generated/nr-irqs.h: arch/$(SRCARCH)/kernel/nr-irqs.s FORCE
+ $(call filechk,offsets,__ASM_NR_IRQS_H__)
diff --git a/arch/s390/kernel/vdso32/Makefile b/arch/s390/kernel/vdso32/Makefile
index ee8a18e50a25..29b72c46284d 100644
--- a/arch/s390/kernel/vdso32/Makefile
+++ b/arch/s390/kernel/vdso32/Makefile
@@ -29,7 +29,7 @@ GCOV_PROFILE := n
$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
# link rule for the .so file, .lds has to be first
-$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32)
+$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE
$(call if_changed,vdso32ld)
# strip rule for the .so file
@@ -38,12 +38,12 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
$(call if_changed,objcopy)
# assembly rules for the .S files
-$(obj-vdso32): %.o: %.S
+$(obj-vdso32): %.o: %.S FORCE
$(call if_changed_dep,vdso32as)
# actual build commands
quiet_cmd_vdso32ld = VDSO32L $@
- cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
+ cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@
quiet_cmd_vdso32as = VDSO32A $@
cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
index c4b03f9ed228..1b083d80de50 100644
--- a/arch/s390/kernel/vdso64/Makefile
+++ b/arch/s390/kernel/vdso64/Makefile
@@ -29,7 +29,7 @@ GCOV_PROFILE := n
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
# link rule for the .so file, .lds has to be first
-$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
+$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
$(call if_changed,vdso64ld)
# strip rule for the .so file
@@ -38,12 +38,12 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
$(call if_changed,objcopy)
# assembly rules for the .S files
-$(obj-vdso64): %.o: %.S
+$(obj-vdso64): %.o: %.S FORCE
$(call if_changed_dep,vdso64as)
# actual build commands
quiet_cmd_vdso64ld = VDSO64L $@
- cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
+ cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@
quiet_cmd_vdso64as = VDSO64A $@
cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
diff --git a/arch/s390/numa/numa.c b/arch/s390/numa/numa.c
index 43f32ce60aa3..734f56d774bb 100644
--- a/arch/s390/numa/numa.c
+++ b/arch/s390/numa/numa.c
@@ -47,6 +47,7 @@ int __node_distance(int a, int b)
{
return mode->distance ? mode->distance(a, b) : 0;
}
+EXPORT_SYMBOL(__node_distance);
int numa_debug_enabled;
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index b856c66ebd3a..6dbf27ffafc8 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -585,6 +585,11 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
fatal_sigsegv();
}
longjmp(*switch_buf, 1);
+
+ /* unreachable */
+ printk(UM_KERN_ERR "impossible long jump!");
+ fatal_sigsegv();
+ return 0;
}
void initial_thread_cb_skas(void (*proc)(void *), void *arg)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index d2c663aeccba..e26560cd1844 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -11,6 +11,16 @@ else
KBUILD_DEFCONFIG := $(ARCH)_defconfig
endif
+# For gcc stack alignment is specified with -mpreferred-stack-boundary,
+# clang has the option -mstack-alignment for that purpose.
+ifneq ($(call cc-option, -mpreferred-stack-boundary=4),)
+ cc_stack_align4 := -mpreferred-stack-boundary=2
+ cc_stack_align8 := -mpreferred-stack-boundary=3
+else ifneq ($(call cc-option, -mstack-alignment=16),)
+ cc_stack_align4 := -mstack-alignment=4
+ cc_stack_align8 := -mstack-alignment=8
+endif
+
# How to compile the 16-bit code. Note we always compile for -march=i386;
# that way we can complain to the user if the CPU is insufficient.
#
@@ -24,10 +34,11 @@ REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \
-DDISABLE_BRANCH_PROFILING \
-Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
-fno-strict-aliasing -fomit-frame-pointer -fno-pic \
- -mno-mmx -mno-sse \
- $(call cc-option, -ffreestanding) \
- $(call cc-option, -fno-stack-protector) \
- $(call cc-option, -mpreferred-stack-boundary=2)
+ -mno-mmx -mno-sse
+
+REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -ffreestanding)
+REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -fno-stack-protector)
+REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), $(cc_stack_align4))
export REALMODE_CFLAGS
# BITS is used as extension for files which are available in a 32 bit
@@ -64,8 +75,10 @@ ifeq ($(CONFIG_X86_32),y)
# with nonstandard options
KBUILD_CFLAGS += -fno-pic
- # prevent gcc from keeping the stack 16 byte aligned
- KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
+ # Align the stack to the register width instead of using the default
+ # alignment of 16 bytes. This reduces stack usage and the number of
+ # alignment instructions.
+ KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align4))
# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
# a lot more stack due to the lack of sharing of stacklots:
@@ -88,17 +101,23 @@ else
KBUILD_CFLAGS += -m64
# Align jump targets to 1 byte, not the default 16 bytes:
- KBUILD_CFLAGS += -falign-jumps=1
+ KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)
# Pack loops tightly as well:
- KBUILD_CFLAGS += -falign-loops=1
+ KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)
# Don't autogenerate traditional x87 instructions
KBUILD_CFLAGS += $(call cc-option,-mno-80387)
KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
- # Use -mpreferred-stack-boundary=3 if supported.
- KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)
+ # By default gcc and clang use a stack alignment of 16 bytes for x86.
+ # However the standard kernel entry on x86-64 leaves the stack on an
+ # 8-byte boundary. If the compiler isn't informed about the actual
+ # alignment it will generate extra alignment instructions for the
+ # default alignment which keep the stack *mis*aligned.
+ # Furthermore an alignment to the register width reduces stack usage
+ # and the number of alignment instructions.
+ KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align8))
# Use -mskip-rax-setup if supported.
KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
diff --git a/arch/x86/boot/compressed/aslr.c b/arch/x86/boot/compressed/aslr.c
index 6a9b96b4624d..31dab2135188 100644
--- a/arch/x86/boot/compressed/aslr.c
+++ b/arch/x86/boot/compressed/aslr.c
@@ -1,5 +1,6 @@
#include "misc.h"
+#include <asm/asm.h>
#include <asm/msr.h>
#include <asm/archrandom.h>
#include <asm/e820.h>
@@ -94,7 +95,7 @@ static unsigned long get_random_long(void)
}
/* Circular multiply for better bit diffusion */
- asm("mul %3"
+ asm(_ASM_MUL "%3"
: "=a" (random), "=d" (raw)
: "a" (random), "rm" (mix_const));
random += raw;
diff --git a/arch/x86/boot/string.c b/arch/x86/boot/string.c
index 06ceddb3a22e..1d56adea8a7c 100644
--- a/arch/x86/boot/string.c
+++ b/arch/x86/boot/string.c
@@ -16,6 +16,15 @@
#include "ctype.h"
#include "string.h"
+/*
+ * Undef these macros so that the functions that we provide
+ * here will have the correct names regardless of how string.h
+ * may have chosen to #define them.
+ */
+#undef memcpy
+#undef memset
+#undef memcmp
+
int memcmp(const void *s1, const void *s2, size_t len)
{
u8 diff;
diff --git a/arch/x86/crypto/aes_ctrby8_avx-x86_64.S b/arch/x86/crypto/aes_ctrby8_avx-x86_64.S
index a916c4a61165..5f6a5af9c489 100644
--- a/arch/x86/crypto/aes_ctrby8_avx-x86_64.S
+++ b/arch/x86/crypto/aes_ctrby8_avx-x86_64.S
@@ -65,7 +65,6 @@
#include <linux/linkage.h>
#include <asm/inst.h>
-#define CONCAT(a,b) a##b
#define VMOVDQ vmovdqu
#define xdata0 %xmm0
@@ -92,8 +91,6 @@
#define num_bytes %r8
#define tmp %r10
-#define DDQ(i) CONCAT(ddq_add_,i)
-#define XMM(i) CONCAT(%xmm, i)
#define DDQ_DATA 0
#define XDATA 1
#define KEY_128 1
@@ -131,12 +128,12 @@ ddq_add_8:
/* generate a unique variable for ddq_add_x */
.macro setddq n
- var_ddq_add = DDQ(\n)
+ var_ddq_add = ddq_add_\n
.endm
/* generate a unique variable for xmm register */
.macro setxdata n
- var_xdata = XMM(\n)
+ var_xdata = %xmm\n
.endm
/* club the numeric 'id' to the symbol 'name' */
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 21e84a31d211..f3d4f1edc947 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -34,6 +34,7 @@
#define _ASM_ADD __ASM_SIZE(add)
#define _ASM_SUB __ASM_SIZE(sub)
#define _ASM_XADD __ASM_SIZE(xadd)
+#define _ASM_MUL __ASM_SIZE(mul)
#define _ASM_AX __ASM_REG(ax)
#define _ASM_BX __ASM_REG(bx)
diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index 5365ff6e69c1..ee565b23795b 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -29,6 +29,7 @@ static const struct acpi_device_id forbidden_id_list[] = {
{"PNP0200", 0}, /* AT DMA Controller */
{"ACPI0009", 0}, /* IOxAPIC */
{"ACPI000A", 0}, /* IOAPIC */
+ {"SMB0001", 0}, /* ACPI SMBUS virtual device */
{"", 0},
};
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 502406c9e6e1..616ee4f9c233 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1184,6 +1184,11 @@ static struct attribute_group zram_disk_attr_group = {
.attrs = zram_disk_attrs,
};
+static const struct attribute_group *zram_disk_attr_groups[] = {
+ &zram_disk_attr_group,
+ NULL,
+};
+
/*
* Allocate and initialize new zram device. the function returns
* '>= 0' device_id upon success, and negative value otherwise.
@@ -1264,15 +1269,9 @@ static int zram_add(void)
zram->disk->queue->limits.discard_zeroes_data = 0;
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, zram->disk->queue);
+ disk_to_dev(zram->disk)->groups = zram_disk_attr_groups;
add_disk(zram->disk);
- ret = sysfs_create_group(&disk_to_dev(zram->disk)->kobj,
- &zram_disk_attr_group);
- if (ret < 0) {
- pr_err("Error creating sysfs group for device %d\n",
- device_id);
- goto out_free_disk;
- }
strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor));
zram->meta = NULL;
zram->max_comp_streams = 1;
@@ -1280,9 +1279,6 @@ static int zram_add(void)
pr_info("Added device: %s\n", zram->disk->disk_name);
return device_id;
-out_free_disk:
- del_gendisk(zram->disk);
- put_disk(zram->disk);
out_free_queue:
blk_cleanup_queue(queue);
out_free_idr:
@@ -1310,16 +1306,6 @@ static int zram_remove(struct zram *zram)
zram->claim = true;
mutex_unlock(&bdev->bd_mutex);
- /*
- * Remove sysfs first, so no one will perform a disksize
- * store while we destroy the devices. This also helps during
- * hot_remove -- zram_reset_device() is the last holder of
- * ->init_lock, no later/concurrent disksize_store() or any
- * other sysfs handlers are possible.
- */
- sysfs_remove_group(&disk_to_dev(zram->disk)->kobj,
- &zram_disk_attr_group);
-
/* Make sure all the pending I/O are finished */
fsync_bdev(bdev);
zram_reset_device(zram);
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 4685bd10c473..ec6af1595062 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -125,7 +125,6 @@ config BT_HCIUART_LL
config BT_HCIUART_3WIRE
bool "Three-wire UART (H5) protocol support"
depends on BT_HCIUART
- depends on BT_HCIUART_SERDEV
help
The HCI Three-wire UART Transport Layer makes it possible to
user the Bluetooth HCI over a serial port interface. The HCI
diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 389af3c15ec4..bde71b07f15e 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -273,6 +273,7 @@ static const struct samsung_clk_reg_dump exynos5420_set_clksrc[] = {
{ .offset = GATE_BUS_TOP, .value = 0xffffffff, },
{ .offset = GATE_BUS_DISP1, .value = 0xffffffff, },
{ .offset = GATE_IP_PERIC, .value = 0xffffffff, },
+ { .offset = GATE_IP_PERIS, .value = 0xffffffff, },
};
static int exynos5420_clk_suspend(void)
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index 3c0467d3688c..88bd6829a358 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -10,7 +10,7 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2 \
-fPIC -fno-strict-aliasing -mno-red-zone \
-mno-mmx -mno-sse -DDISABLE_BRANCH_PROFILING
-cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS))
+cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS)) -fpie
cflags-$(CONFIG_ARM) := $(subst -pg,,$(KBUILD_CFLAGS)) \
-fno-builtin -fpic -mno-single-pic-base
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
index 78dfbd34b6bf..044efb779ed1 100644
--- a/drivers/firmware/efi/libstub/arm64-stub.c
+++ b/drivers/firmware/efi/libstub/arm64-stub.c
@@ -9,9 +9,17 @@
* published by the Free Software Foundation.
*
*/
+
+/*
+ * To prevent the compiler from emitting GOT-indirected (and thus absolute)
+ * references to the section markers, override their visibility as 'hidden'
+ */
+#pragma GCC visibility push(hidden)
+#include <asm/sections.h>
+#pragma GCC visibility pop
+
#include <linux/efi.h>
#include <asm/efi.h>
-#include <asm/sections.h>
efi_status_t __init handle_kernel_image(efi_system_table_t *sys_table_arg,
unsigned long *image_addr,
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 1a2032c2c1fb..f6863adc15ad 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -12,6 +12,7 @@
#include <linux/atomic.h>
#include <linux/compat.h>
+#include <linux/cred.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/hid.h>
@@ -24,6 +25,7 @@
#include <linux/spinlock.h>
#include <linux/uhid.h>
#include <linux/wait.h>
+#include <linux/uaccess.h>
#define UHID_NAME "uhid"
#define UHID_BUFSIZE 32
@@ -721,6 +723,17 @@ static ssize_t uhid_char_write(struct file *file, const char __user *buffer,
switch (uhid->input_buf.type) {
case UHID_CREATE:
+ /*
+ * 'struct uhid_create_req' contains a __user pointer which is
+ * copied from, so it's unsafe to allow this with elevated
+ * privileges (e.g. from a setuid binary) or via kernel_write().
+ */
+ if (file->f_cred != current_cred() || uaccess_kernel()) {
+ pr_err_once("UHID_CREATE from different security context by process %d (%s), this is not allowed.\n",
+ task_tgid_vnr(current), current->comm);
+ ret = -EACCES;
+ goto unlock;
+ }
ret = uhid_dev_create(uhid, &uhid->input_buf);
break;
case UHID_CREATE2:
diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c
index 55b5a8ff1cfe..ca3aa28977bc 100644
--- a/drivers/hwmon/ibmpowernv.c
+++ b/drivers/hwmon/ibmpowernv.c
@@ -114,7 +114,7 @@ static ssize_t show_label(struct device *dev, struct device_attribute *devattr,
return sprintf(buf, "%s\n", sdata->label);
}
-static int __init get_logical_cpu(int hwcpu)
+static int get_logical_cpu(int hwcpu)
{
int cpu;
@@ -125,9 +125,8 @@ static int __init get_logical_cpu(int hwcpu)
return -ENOENT;
}
-static void __init make_sensor_label(struct device_node *np,
- struct sensor_data *sdata,
- const char *label)
+static void make_sensor_label(struct device_node *np,
+ struct sensor_data *sdata, const char *label)
{
u32 id;
size_t n;
diff --git a/drivers/media/v4l2-core/v4l2-event.c b/drivers/media/v4l2-core/v4l2-event.c
index b47ac4e053d0..f5c8a952f0aa 100644
--- a/drivers/media/v4l2-core/v4l2-event.c
+++ b/drivers/media/v4l2-core/v4l2-event.c
@@ -197,6 +197,22 @@ int v4l2_event_pending(struct v4l2_fh *fh)
}
EXPORT_SYMBOL_GPL(v4l2_event_pending);
+static void __v4l2_event_unsubscribe(struct v4l2_subscribed_event *sev)
+{
+ struct v4l2_fh *fh = sev->fh;
+ unsigned int i;
+
+ lockdep_assert_held(&fh->subscribe_lock);
+ assert_spin_locked(&fh->vdev->fh_lock);
+
+ /* Remove any pending events for this subscription */
+ for (i = 0; i < sev->in_use; i++) {
+ list_del(&sev->events[sev_pos(sev, i)].list);
+ fh->navailable--;
+ }
+ list_del(&sev->list);
+}
+
int v4l2_event_subscribe(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub, unsigned elems,
const struct v4l2_subscribed_event_ops *ops)
@@ -228,27 +244,23 @@ int v4l2_event_subscribe(struct v4l2_fh *fh,
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
found_ev = v4l2_event_subscribed(fh, sub->type, sub->id);
+ if (!found_ev)
+ list_add(&sev->list, &fh->subscribed);
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
if (found_ev) {
/* Already listening */
kfree(sev);
- goto out_unlock;
- }
-
- if (sev->ops && sev->ops->add) {
+ } else if (sev->ops && sev->ops->add) {
ret = sev->ops->add(sev, elems);
if (ret) {
+ spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+ __v4l2_event_unsubscribe(sev);
+ spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
kfree(sev);
- goto out_unlock;
}
}
- spin_lock_irqsave(&fh->vdev->fh_lock, flags);
- list_add(&sev->list, &fh->subscribed);
- spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
-
-out_unlock:
mutex_unlock(&fh->subscribe_lock);
return ret;
@@ -283,7 +295,6 @@ int v4l2_event_unsubscribe(struct v4l2_fh *fh,
{
struct v4l2_subscribed_event *sev;
unsigned long flags;
- int i;
if (sub->type == V4L2_EVENT_ALL) {
v4l2_event_unsubscribe_all(fh);
@@ -295,14 +306,8 @@ int v4l2_event_unsubscribe(struct v4l2_fh *fh,
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
sev = v4l2_event_subscribed(fh, sub->type, sub->id);
- if (sev != NULL) {
- /* Remove any pending events for this subscription */
- for (i = 0; i < sev->in_use; i++) {
- list_del(&sev->events[sev_pos(sev, i)].list);
- fh->navailable--;
- }
- list_del(&sev->list);
- }
+ if (sev != NULL)
+ __v4l2_event_unsubscribe(sev);
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 1c37d5a78822..8ce9c63dfc59 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -870,12 +870,9 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
dprintk(4, "done processing on buffer %d, state: %d\n",
vb->index, state);
- if (state != VB2_BUF_STATE_QUEUED &&
- state != VB2_BUF_STATE_REQUEUEING) {
- /* sync buffers */
- for (plane = 0; plane < vb->num_planes; ++plane)
- call_void_memop(vb, finish, vb->planes[plane].mem_priv);
- }
+ /* sync buffers */
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ call_void_memop(vb, finish, vb->planes[plane].mem_priv);
spin_lock_irqsave(&q->done_lock, flags);
if (state == VB2_BUF_STATE_QUEUED ||
diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index e11a0bd6c66e..e2474af7386a 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -129,7 +129,7 @@ static const struct of_device_id atmel_ssc_dt_ids[] = {
MODULE_DEVICE_TABLE(of, atmel_ssc_dt_ids);
#endif
-static inline const struct atmel_ssc_platform_data * __init
+static inline const struct atmel_ssc_platform_data *
atmel_ssc_get_driver_data(struct platform_device *pdev)
{
if (pdev->dev.of_node) {
diff --git a/drivers/misc/sgi-gru/grukdump.c b/drivers/misc/sgi-gru/grukdump.c
index 313da3150262..1540a7785e14 100644
--- a/drivers/misc/sgi-gru/grukdump.c
+++ b/drivers/misc/sgi-gru/grukdump.c
@@ -27,6 +27,9 @@
#include <linux/delay.h>
#include <linux/bitops.h>
#include <asm/uv/uv_hub.h>
+
+#include <linux/nospec.h>
+
#include "gru.h"
#include "grutables.h"
#include "gruhandles.h"
@@ -196,6 +199,7 @@ int gru_dump_chiplet_request(unsigned long arg)
/* Currently, only dump by gid is implemented */
if (req.gid >= gru_max_gids)
return -EINVAL;
+ req.gid = array_index_nospec(req.gid, gru_max_gids);
gru = GID_TO_GRU(req.gid);
ubuf = req.buf;
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index ce3a56bea6e6..58102e96ac5c 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -12379,6 +12379,7 @@ static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *e
{
struct tg3 *tp = netdev_priv(dev);
int i, irq_sync = 0, err = 0;
+ bool reset_phy = false;
if ((ering->rx_pending > tp->rx_std_ring_mask) ||
(ering->rx_jumbo_pending > tp->rx_jmb_ring_mask) ||
@@ -12410,7 +12411,13 @@ static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *e
if (netif_running(dev)) {
tg3_halt(tp, RESET_KIND_SHUTDOWN, 1);
- err = tg3_restart_hw(tp, false);
+ /* Reset PHY to avoid PHY lock up */
+ if (tg3_asic_rev(tp) == ASIC_REV_5717 ||
+ tg3_asic_rev(tp) == ASIC_REV_5719 ||
+ tg3_asic_rev(tp) == ASIC_REV_5720)
+ reset_phy = true;
+
+ err = tg3_restart_hw(tp, reset_phy);
if (!err)
tg3_netif_start(tp);
}
@@ -12444,6 +12451,7 @@ static int tg3_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam
{
struct tg3 *tp = netdev_priv(dev);
int err = 0;
+ bool reset_phy = false;
if (tp->link_config.autoneg == AUTONEG_ENABLE)
tg3_warn_mgmt_link_flap(tp);
@@ -12534,7 +12542,13 @@ static int tg3_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam
if (netif_running(dev)) {
tg3_halt(tp, RESET_KIND_SHUTDOWN, 1);
- err = tg3_restart_hw(tp, false);
+ /* Reset PHY to avoid PHY lock up */
+ if (tg3_asic_rev(tp) == ASIC_REV_5717 ||
+ tg3_asic_rev(tp) == ASIC_REV_5719 ||
+ tg3_asic_rev(tp) == ASIC_REV_5720)
+ reset_phy = true;
+
+ err = tg3_restart_hw(tp, reset_phy);
if (!err)
tg3_netif_start(tp);
}
diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
index 460fa6708bfc..3c4b107aba78 100644
--- a/drivers/platform/x86/acerhdf.c
+++ b/drivers/platform/x86/acerhdf.c
@@ -233,6 +233,7 @@ static const struct bios_settings bios_tbl[] = {
{"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},
{"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},
{"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},
+ {"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0},
/* Packard Bell */
{"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0},
{"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 0ab15d833d1b..50fe1f76ea42 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -842,6 +842,8 @@ int __uio_register_device(struct module *owner,
if (ret)
goto err_uio_dev_add_attributes;
+ info->uio_dev = idev;
+
if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
/*
* Note that we deliberately don't use devm_request_irq
@@ -853,11 +855,12 @@ int __uio_register_device(struct module *owner,
*/
ret = request_irq(info->irq, uio_interrupt,
info->irq_flags, info->name, idev);
- if (ret)
+ if (ret) {
+ info->uio_dev = NULL;
goto err_request_irq;
+ }
}
- info->uio_dev = idev;
return 0;
err_request_irq:
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 3cbf6aa10f2c..0a8e5ac891d4 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1716,6 +1716,9 @@ static const struct usb_device_id acm_ids[] = {
{ USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
},
+ { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
{ USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
.driver_info = QUIRK_CONTROL_LINE_STATE, },
{ USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 37a5e07b3488..1e8f68960014 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -243,6 +243,9 @@ static const struct usb_device_id usb_quirk_list[] = {
{ USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT |
USB_QUIRK_DELAY_CTRL_MSG },
+ /* Corsair K70 LUX RGB */
+ { USB_DEVICE(0x1b1c, 0x1b33), .driver_info = USB_QUIRK_DELAY_INIT },
+
/* Corsair K70 LUX */
{ USB_DEVICE(0x1b1c, 0x1b36), .driver_info = USB_QUIRK_DELAY_INIT },
@@ -263,6 +266,11 @@ static const struct usb_device_id usb_quirk_list[] = {
{ USB_DEVICE(0x2040, 0x7200), .driver_info =
USB_QUIRK_CONFIG_INTF_STRINGS },
+ /* Raydium Touchscreen */
+ { USB_DEVICE(0x2386, 0x3114), .driver_info = USB_QUIRK_NO_LPM },
+
+ { USB_DEVICE(0x2386, 0x3119), .driver_info = USB_QUIRK_NO_LPM },
+
/* DJI CineSSD */
{ USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM },
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index f788f80fe1aa..aee29604bd79 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -348,7 +348,7 @@ int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
slot_id = 0;
for (i = 0; i < MAX_HC_SLOTS; i++) {
- if (!xhci->devs[i])
+ if (!xhci->devs[i] || !xhci->devs[i]->udev)
continue;
speed = xhci->devs[i]->udev->speed;
if (((speed >= USB_SPEED_SUPER) == (hcd->speed >= HCD_USB3))
diff --git a/drivers/usb/misc/appledisplay.c b/drivers/usb/misc/appledisplay.c
index a0a3827b4aff..b15842c6f916 100644
--- a/drivers/usb/misc/appledisplay.c
+++ b/drivers/usb/misc/appledisplay.c
@@ -63,6 +63,7 @@ static const struct usb_device_id appledisplay_table[] = {
{ APPLEDISPLAY_DEVICE(0x9219) },
{ APPLEDISPLAY_DEVICE(0x921c) },
{ APPLEDISPLAY_DEVICE(0x921d) },
+ { APPLEDISPLAY_DEVICE(0x9222) },
{ APPLEDISPLAY_DEVICE(0x9236) },
/* Terminating entry */
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8dbb00fbb00b..b0875ef48522 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -4333,6 +4333,7 @@ static int btrfs_destroy_marked_extents(struct btrfs_root *root,
static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
struct extent_io_tree *pinned_extents)
{
+ struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_io_tree *unpin;
u64 start;
u64 end;
@@ -4342,21 +4343,31 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
unpin = pinned_extents;
again:
while (1) {
+ /*
+ * The btrfs_finish_extent_commit() may get the same range as
+ * ours between find_first_extent_bit and clear_extent_dirty.
+ * Hence, hold the unused_bg_unpin_mutex to avoid double unpin
+ * the same extent range.
+ */
+ mutex_lock(&fs_info->unused_bg_unpin_mutex);
ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY, NULL);
- if (ret)
+ if (ret) {
+ mutex_unlock(&fs_info->unused_bg_unpin_mutex);
break;
+ }
clear_extent_dirty(unpin, start, end, GFP_NOFS);
btrfs_error_unpin_extent_range(root, start, end);
+ mutex_unlock(&fs_info->unused_bg_unpin_mutex);
cond_resched();
}
if (loop) {
- if (unpin == &root->fs_info->freed_extents[0])
- unpin = &root->fs_info->freed_extents[1];
+ if (unpin == &fs_info->freed_extents[0])
+ unpin = &fs_info->freed_extents[1];
else
- unpin = &root->fs_info->freed_extents[0];
+ unpin = &fs_info->freed_extents[0];
loop = false;
goto again;
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index b795c567b5e1..360ba74e04e6 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -100,6 +100,7 @@ static int parse_options(char *options, struct exofs_mountopt *opts)
token = match_token(p, tokens, args);
switch (token) {
case Opt_name:
+ kfree(opts->dev_name);
opts->dev_name = match_strdup(&args[0]);
if (unlikely(!opts->dev_name)) {
EXOFS_ERR("Error allocating dev_name");
@@ -868,8 +869,10 @@ static struct dentry *exofs_mount(struct file_system_type *type,
int ret;
ret = parse_options(data, &opts);
- if (ret)
+ if (ret) {
+ kfree(opts.dev_name);
return ERR_PTR(ret);
+ }
if (!opts.dev_name)
opts.dev_name = dev_name;
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index c134c0462cee..ef24894edecc 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -732,6 +732,7 @@ void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
spin_lock(&gl->gl_lockref.lock);
gl->gl_object = NULL;
spin_unlock(&gl->gl_lockref.lock);
+ gfs2_rgrp_brelse(rgd);
gfs2_glock_add_to_lru(gl);
gfs2_glock_put(gl);
}
@@ -1139,7 +1140,7 @@ static u32 count_unlinked(struct gfs2_rgrpd *rgd)
* @rgd: the struct gfs2_rgrpd describing the RG to read in
*
* Read in all of a Resource Group's header and bitmap blocks.
- * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps.
+ * Caller must eventually call gfs2_rgrp_brelse() to free the bitmaps.
*
* Returns: errno
*/
diff --git a/fs/hfs/brec.c b/fs/hfs/brec.c
index 2a6f3c67cb3f..2e713673df42 100644
--- a/fs/hfs/brec.c
+++ b/fs/hfs/brec.c
@@ -424,6 +424,10 @@ skip:
if (new_node) {
__be32 cnid;
+ if (!new_node->parent) {
+ hfs_btree_inc_height(tree);
+ new_node->parent = tree->root;
+ }
fd->bnode = hfs_bnode_find(tree, new_node->parent);
/* create index key and entry */
hfs_bnode_read_key(new_node, fd->search_key, 14);
diff --git a/fs/hfsplus/brec.c b/fs/hfsplus/brec.c
index 754fdf8c6356..1002a0c08319 100644
--- a/fs/hfsplus/brec.c
+++ b/fs/hfsplus/brec.c
@@ -427,6 +427,10 @@ skip:
if (new_node) {
__be32 cnid;
+ if (!new_node->parent) {
+ hfs_btree_inc_height(tree);
+ new_node->parent = tree->root;
+ }
fd->bnode = hfs_bnode_find(tree, new_node->parent);
/* create index key and entry */
hfs_bnode_read_key(new_node, fd->search_key, 14);
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 8b32fdaad468..d424b3d4bf3b 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -184,6 +184,7 @@ struct reiserfs_dentry_buf {
struct dir_context ctx;
struct dentry *xadir;
int count;
+ int err;
struct dentry *dentries[8];
};
@@ -206,6 +207,7 @@ fill_with_dentries(struct dir_context *ctx, const char *name, int namelen,
dentry = lookup_one_len(name, dbuf->xadir, namelen);
if (IS_ERR(dentry)) {
+ dbuf->err = PTR_ERR(dentry);
return PTR_ERR(dentry);
} else if (d_really_is_negative(dentry)) {
/* A directory entry exists, but no file? */
@@ -214,6 +216,7 @@ fill_with_dentries(struct dir_context *ctx, const char *name, int namelen,
"not found for file %pd.\n",
dentry, dbuf->xadir);
dput(dentry);
+ dbuf->err = -EIO;
return -EIO;
}
@@ -261,6 +264,10 @@ static int reiserfs_for_each_xattr(struct inode *inode,
err = reiserfs_readdir_inode(d_inode(dir), &buf.ctx);
if (err)
break;
+ if (buf.err) {
+ err = buf.err;
+ break;
+ }
if (!buf.count)
break;
for (i = 0; !err && i < buf.count && buf.dentries[i]; i++) {
diff --git a/include/linux/kbuild.h b/include/linux/kbuild.h
index 22a72198c14b..4e80f3a9ad58 100644
--- a/include/linux/kbuild.h
+++ b/include/linux/kbuild.h
@@ -2,14 +2,14 @@
#define __LINUX_KBUILD_H
#define DEFINE(sym, val) \
- asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+ asm volatile("\n.ascii \"->" #sym " %0 " #val "\"" : : "i" (val))
-#define BLANK() asm volatile("\n->" : : )
+#define BLANK() asm volatile("\n.ascii \"->\"" : : )
#define OFFSET(sym, str, mem) \
DEFINE(sym, offsetof(struct str, mem))
#define COMMENT(x) \
- asm volatile("\n->#" x)
+ asm volatile("\n.ascii \"->#" x "\"")
#endif
diff --git a/include/linux/module.h b/include/linux/module.h
index c9f2f85017ad..dfe5c2e25ba1 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -125,13 +125,13 @@ extern void cleanup_module(void);
/* Each module must use one module_init(). */
#define module_init(initfn) \
- static inline initcall_t __inittest(void) \
+ static inline initcall_t __maybe_unused __inittest(void) \
{ return initfn; } \
int init_module(void) __attribute__((alias(#initfn)));
/* This is only required if you want to be unloadable. */
#define module_exit(exitfn) \
- static inline exitcall_t __exittest(void) \
+ static inline exitcall_t __maybe_unused __exittest(void) \
{ return exitfn; } \
void cleanup_module(void) __attribute__((alias(#exitfn)));
diff --git a/include/linux/netfilter/ipset/ip_set_comment.h b/include/linux/netfilter/ipset/ip_set_comment.h
index 8d0248525957..9f34204978e4 100644
--- a/include/linux/netfilter/ipset/ip_set_comment.h
+++ b/include/linux/netfilter/ipset/ip_set_comment.h
@@ -41,11 +41,11 @@ ip_set_init_comment(struct ip_set_comment *comment,
rcu_assign_pointer(comment->c, c);
}
-/* Used only when dumping a set, protected by rcu_read_lock_bh() */
+/* Used only when dumping a set, protected by rcu_read_lock() */
static inline int
ip_set_put_comment(struct sk_buff *skb, struct ip_set_comment *comment)
{
- struct ip_set_comment_rcu *c = rcu_dereference_bh(comment->c);
+ struct ip_set_comment_rcu *c = rcu_dereference(comment->c);
if (!c)
return 0;
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 558129af828a..15c7b5420d8a 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -2,6 +2,9 @@
#define __LINUX_UACCESS_H__
#include <linux/sched.h>
+
+#define uaccess_kernel() segment_eq(get_fs(), KERNEL_DS)
+
#include <asm/uaccess.h>
static __always_inline void pagefault_disabled_inc(void)
diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile
index 29090f3db677..28c089cb13f1 100644
--- a/lib/raid6/test/Makefile
+++ b/lib/raid6/test/Makefile
@@ -26,7 +26,7 @@ ifeq ($(ARCH),arm)
CFLAGS += -I../../../arch/arm/include -mfpu=neon
HAS_NEON = yes
endif
-ifeq ($(ARCH),arm64)
+ifeq ($(ARCH),aarch64)
CFLAGS += -I../../../arch/arm64/include
HAS_NEON = yes
endif
@@ -37,7 +37,7 @@ ifeq ($(IS_X86),yes)
gcc -c -x assembler - >&/dev/null && \
rm ./-.o && echo -DCONFIG_AS_AVX2=1)
else ifeq ($(HAS_NEON),yes)
- OBJS += neon.o neon1.o neon2.o neon4.o neon8.o
+ OBJS += neon.o neon1.o neon2.o neon4.o neon8.o recov_neon.o recov_neon_inner.o
CFLAGS += -DCONFIG_KERNEL_MODE_NEON=1
else
HAS_ALTIVEC := $(shell printf '\#include <altivec.h>\nvector int a;\n' |\
diff --git a/net/core/dev.c b/net/core/dev.c
index 7366feb8b5b3..e03c1d2f6707 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4481,6 +4481,10 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
skb->vlan_tci = 0;
skb->dev = napi->dev;
skb->skb_iif = 0;
+
+ /* eth_type_trans() assumes pkt_type is PACKET_HOST */
+ skb->pkt_type = PACKET_HOST;
+
skb->encapsulation = 0;
skb_shinfo(skb)->gso_type = 0;
skb->truesize = SKB_TRUESIZE(skb_end_offset(skb));
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 4d14908afaec..697c4212129a 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -480,8 +480,8 @@ ip_proto_again:
break;
}
- if (dissector_uses_key(flow_dissector,
- FLOW_DISSECTOR_KEY_PORTS)) {
+ if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_PORTS) &&
+ !(key_control->flags & FLOW_DIS_IS_FRAGMENT)) {
key_ports = skb_flow_dissector_target(flow_dissector,
FLOW_DISSECTOR_KEY_PORTS,
target_container);
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index dbda0565781c..4916d1857b75 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -71,7 +71,7 @@ int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
iph->version = 4;
iph->ihl = sizeof(struct iphdr) >> 2;
- iph->frag_off = df;
+ iph->frag_off = ip_mtu_locked(&rt->dst) ? 0 : df;
iph->protocol = proto;
iph->tos = tos;
iph->daddr = dst;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 2f6d8f57fdd4..1cb8954885ec 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1420,8 +1420,12 @@ EXPORT_SYMBOL_GPL(ip6_update_pmtu);
void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu)
{
- ip6_update_pmtu(skb, sock_net(sk), mtu,
- sk->sk_bound_dev_if, sk->sk_mark);
+ int oif = sk->sk_bound_dev_if;
+
+ if (!oif && skb->dev)
+ oif = l3mdev_master_ifindex(skb->dev);
+
+ ip6_update_pmtu(skb, sock_net(sk), mtu, oif, sk->sk_mark);
}
EXPORT_SYMBOL_GPL(ip6_sk_update_pmtu);
diff --git a/net/netfilter/ipset/ip_set_hash_netportnet.c b/net/netfilter/ipset/ip_set_hash_netportnet.c
index 9a14c237830f..b259a5814965 100644
--- a/net/netfilter/ipset/ip_set_hash_netportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_netportnet.c
@@ -213,13 +213,13 @@ hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
if (tb[IPSET_ATTR_CIDR]) {
e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
- if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
+ if (e.cidr[0] > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
}
if (tb[IPSET_ATTR_CIDR2]) {
e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
- if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
+ if (e.cidr[1] > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
}
@@ -492,13 +492,13 @@ hash_netportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
if (tb[IPSET_ATTR_CIDR]) {
e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
- if (!e.cidr[0] || e.cidr[0] > HOST_MASK)
+ if (e.cidr[0] > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
}
if (tb[IPSET_ATTR_CIDR2]) {
e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
- if (!e.cidr[1] || e.cidr[1] > HOST_MASK)
+ if (e.cidr[1] > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
}
diff --git a/net/netfilter/xt_IDLETIMER.c b/net/netfilter/xt_IDLETIMER.c
index 1718f536689f..8a1d2af3eed0 100644
--- a/net/netfilter/xt_IDLETIMER.c
+++ b/net/netfilter/xt_IDLETIMER.c
@@ -116,6 +116,22 @@ static void idletimer_tg_expired(unsigned long data)
schedule_work(&timer->work);
}
+static int idletimer_check_sysfs_name(const char *name, unsigned int size)
+{
+ int ret;
+
+ ret = xt_check_proc_name(name, size);
+ if (ret < 0)
+ return ret;
+
+ if (!strcmp(name, "power") ||
+ !strcmp(name, "subsystem") ||
+ !strcmp(name, "uevent"))
+ return -EINVAL;
+
+ return 0;
+}
+
static int idletimer_tg_create(struct idletimer_tg_info *info)
{
int ret;
@@ -126,6 +142,10 @@ static int idletimer_tg_create(struct idletimer_tg_info *info)
goto out;
}
+ ret = idletimer_check_sysfs_name(info->label, sizeof(info->label));
+ if (ret < 0)
+ goto out_free_timer;
+
sysfs_attr_init(&info->timer->attr.attr);
info->timer->attr.attr.name = kstrdup(info->label, GFP_KERNEL);
if (!info->timer->attr.attr.name) {
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 9b8d855e4a87..ed9bbd383f7d 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -512,7 +512,7 @@ EXPORT_SYMBOL_GPL(xdr_commit_encode);
static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr,
size_t nbytes)
{
- static __be32 *p;
+ __be32 *p;
int space_left;
int frag1bytes, frag2bytes;
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 5897fc3857a0..5e9cf7d146f0 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -108,16 +108,21 @@ as-option = $(call try-run,\
as-instr = $(call try-run,\
printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
+# __cc-option
+# Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586)
+__cc-option = $(call try-run,\
+ $(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
+
# cc-option
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
-cc-option = $(call try-run,\
- $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
+cc-option = $(call __cc-option, $(CC),\
+ $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2))
# cc-option-yn
# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
cc-option-yn = $(call try-run,\
- $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
+ $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
# cc-option-align
# Prefix align with either -falign or -malign
@@ -127,7 +132,7 @@ cc-option-align = $(subst -functions=0,,\
# cc-disable-warning
# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
cc-disable-warning = $(call try-run,\
- $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
+ $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
# cc-name
# Expands to either gcc or clang
@@ -147,12 +152,13 @@ cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4))
# cc-ldoption
# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
cc-ldoption = $(call try-run,\
- $(CC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
+ $(CC) $(1) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
# ld-option
# Usage: LDFLAGS += $(call ld-option, -X)
ld-option = $(call try-run,\
- $(CC) -x c /dev/null -c -o "$$TMPO" ; $(LD) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
+ $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -x c /dev/null -c -o "$$TMPO"; \
+ $(LD) $(LDFLAGS) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
# ar-option
# Usage: KBUILD_ARFLAGS := $(call ar-option,D)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 18209917e379..42aef001dfdd 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -175,6 +175,14 @@ cmd_cc_symtypes_c = \
$(obj)/%.symtypes : $(src)/%.c FORCE
$(call cmd,cc_symtypes_c)
+# LLVM assembly
+# Generate .ll files from .c
+quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@
+ cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $<
+
+$(obj)/%.ll: $(src)/%.c FORCE
+ $(call if_changed_dep,cc_ll_c)
+
# C (.c) files
# The C file is compiled and updated dependency information is generated.
# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index da3386a9d244..abe5f47b1ab0 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -61,7 +61,6 @@ ifeq ($(cc-name),clang)
KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-value)
KBUILD_CFLAGS += $(call cc-disable-warning, format)
-KBUILD_CFLAGS += $(call cc-disable-warning, unknown-warning-option)
KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare)
KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length)
KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index a2d0e6d32659..27c56b5874f8 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -388,3 +388,34 @@ quiet_cmd_xzmisc = XZMISC $@
cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
(rm -f $@ ; false)
+
+# ASM offsets
+# ---------------------------------------------------------------------------
+
+# Default sed regexp - multiline due to syntax constraints
+#
+# Use [:space:] because LLVM's integrated assembler inserts <tab> around
+# the .ascii directive whereas GCC keeps the <space> as-is.
+define sed-offsets
+ 's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \
+ /^->/{s:->#\(.*\):/* \1 */:; \
+ s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
+ s:->::; p;}'
+endef
+
+# Use filechk to avoid rebuilds when a header changes, but the resulting file
+# does not
+define filechk_offsets
+ (set -e; \
+ echo "#ifndef $2"; \
+ echo "#define $2"; \
+ echo "/*"; \
+ echo " * DO NOT MODIFY."; \
+ echo " *"; \
+ echo " * This file was generated by Kbuild"; \
+ echo " */"; \
+ echo ""; \
+ sed -ne $(sed-offsets); \
+ echo ""; \
+ echo "#endif" )
+endef
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
index c11212ff3510..e0cb2e4a3b15 100644
--- a/scripts/mod/Makefile
+++ b/scripts/mod/Makefile
@@ -5,32 +5,8 @@ modpost-objs := modpost.o file2alias.o sumversion.o
devicetable-offsets-file := devicetable-offsets.h
-define sed-y
- "/^->/{s:->#\(.*\):/* \1 */:; \
- s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
- s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
- s:->::; p;}"
-endef
-
-quiet_cmd_offsets = GEN $@
-define cmd_offsets
- (set -e; \
- echo "#ifndef __DEVICETABLE_OFFSETS_H__"; \
- echo "#define __DEVICETABLE_OFFSETS_H__"; \
- echo "/*"; \
- echo " * DO NOT MODIFY."; \
- echo " *"; \
- echo " * This file was generated by Kbuild"; \
- echo " *"; \
- echo " */"; \
- echo ""; \
- sed -ne $(sed-y) $<; \
- echo ""; \
- echo "#endif" ) > $@
-endef
-
-$(obj)/$(devicetable-offsets-file): $(obj)/devicetable-offsets.s
- $(call if_changed,offsets)
+$(obj)/$(devicetable-offsets-file): $(obj)/devicetable-offsets.s FORCE
+ $(call filechk,offsets,__DEVICETABLE_OFFSETS_H__)
targets += $(devicetable-offsets-file) devicetable-offsets.s
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