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Message-Id: <c0f6219e03cb399d166d518ab505095218a902dd.1656659357.git.naveen.n.rao@linux.vnet.ibm.com>
Date: Fri, 1 Jul 2022 13:04:05 +0530
From: "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
Eric Biederman <ebiederm@...ssion.com>
Cc: <linux-kernel@...r.kernel.org>, kexec@...ts.infradead.org
Subject: [PATCH 2/2] kexec: Drop weak attribute from functions
Drop __weak attribute from functions in kexec_core.c:
- machine_kexec_post_load()
- arch_kexec_protect_crashkres()
- arch_kexec_unprotect_crashkres()
- crash_free_reserved_phys_range()
Suggested-by: Eric Biederman <ebiederm@...ssion.com>
Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
---
arch/arm64/include/asm/kexec.h | 16 ++++++++++++++--
arch/powerpc/include/asm/kexec.h | 5 +++++
arch/s390/include/asm/kexec.h | 11 +++++++++++
arch/x86/include/asm/kexec.h | 6 ++++++
include/linux/kexec.h | 32 ++++++++++++++++++++++++++++----
kernel/kexec_core.c | 27 ---------------------------
6 files changed, 64 insertions(+), 33 deletions(-)
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
index 78d272b26ebd11..559bfae267153d 100644
--- a/arch/arm64/include/asm/kexec.h
+++ b/arch/arm64/include/asm/kexec.h
@@ -84,16 +84,30 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
extern bool crash_is_nosave(unsigned long pfn);
extern void crash_prepare_suspend(void);
extern void crash_post_resume(void);
+
+void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
+#define crash_free_reserved_phys_range crash_free_reserved_phys_range
#else
static inline bool crash_is_nosave(unsigned long pfn) {return false; }
static inline void crash_prepare_suspend(void) {}
static inline void crash_post_resume(void) {}
#endif
+struct kimage;
+
#if defined(CONFIG_KEXEC_CORE)
void cpu_soft_restart(unsigned long el2_switch, unsigned long entry,
unsigned long arg0, unsigned long arg1,
unsigned long arg2);
+
+int machine_kexec_post_load(struct kimage *image);
+#define machine_kexec_post_load machine_kexec_post_load
+
+void arch_kexec_protect_crashkres(void);
+#define arch_kexec_protect_crashkres arch_kexec_protect_crashkres
+
+void arch_kexec_unprotect_crashkres(void);
+#define arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres
#endif
#define ARCH_HAS_KIMAGE_ARCH
@@ -113,8 +127,6 @@ struct kimage_arch {
#ifdef CONFIG_KEXEC_FILE
extern const struct kexec_file_ops kexec_image_ops;
-struct kimage;
-
int arch_kimage_file_post_load_cleanup(struct kimage *image);
#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index 1e5e9b6ec78d9d..d6f4edfe4737ba 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -98,6 +98,11 @@ void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_co
void kexec_copy_flush(struct kimage *image);
+#if defined(CONFIG_CRASH_DUMP) && defined(CONFIG_PPC_RTAS)
+void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
+#define crash_free_reserved_phys_range crash_free_reserved_phys_range
+#endif
+
#ifdef CONFIG_KEXEC_FILE
extern const struct kexec_file_ops kexec_elf64_ops;
diff --git a/arch/s390/include/asm/kexec.h b/arch/s390/include/asm/kexec.h
index 8886aadc11a3a6..1bd08eb56d5fc7 100644
--- a/arch/s390/include/asm/kexec.h
+++ b/arch/s390/include/asm/kexec.h
@@ -85,6 +85,17 @@ struct kimage_arch {
extern const struct kexec_file_ops s390_kexec_image_ops;
extern const struct kexec_file_ops s390_kexec_elf_ops;
+#ifdef CONFIG_CRASH_DUMP
+void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
+#define crash_free_reserved_phys_range crash_free_reserved_phys_range
+
+void arch_kexec_protect_crashkres(void);
+#define arch_kexec_protect_crashkres arch_kexec_protect_crashkres
+
+void arch_kexec_unprotect_crashkres(void);
+#define arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres
+#endif
+
#ifdef CONFIG_KEXEC_FILE
struct purgatory_info;
int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
index 5ec359c1b50cb3..a3760ca796aa24 100644
--- a/arch/x86/include/asm/kexec.h
+++ b/arch/x86/include/asm/kexec.h
@@ -186,6 +186,12 @@ extern int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages,
extern void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages);
#define arch_kexec_pre_free_pages arch_kexec_pre_free_pages
+void arch_kexec_protect_crashkres(void);
+#define arch_kexec_protect_crashkres arch_kexec_protect_crashkres
+
+void arch_kexec_unprotect_crashkres(void);
+#define arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres
+
#ifdef CONFIG_KEXEC_FILE
struct purgatory_info;
int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 5e0bc3f9eac3e9..c358c51c10708d 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -390,7 +390,10 @@ extern void machine_kexec_cleanup(struct kimage *image);
extern int kernel_kexec(void);
extern struct page *kimage_alloc_control_pages(struct kimage *image,
unsigned int order);
-int machine_kexec_post_load(struct kimage *image);
+
+#ifndef machine_kexec_post_load
+static inline int machine_kexec_post_load(struct kimage *image) { return 0; }
+#endif
extern void __crash_kexec(struct pt_regs *);
extern void crash_kexec(struct pt_regs *);
@@ -423,10 +426,21 @@ extern bool kexec_in_progress;
int crash_shrink_memory(unsigned long new_size);
size_t crash_get_memory_size(void);
-void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
-void arch_kexec_protect_crashkres(void);
-void arch_kexec_unprotect_crashkres(void);
+#ifndef arch_kexec_protect_crashkres
+/*
+ * Protection mechanism for crashkernel reserved memory after
+ * the kdump kernel is loaded.
+ *
+ * Provide an empty default implementation here -- architecture
+ * code may override this
+ */
+static inline void arch_kexec_protect_crashkres(void) { }
+#endif
+
+#ifndef arch_kexec_unprotect_crashkres
+static inline void arch_kexec_unprotect_crashkres(void) { }
+#endif
#ifndef page_to_boot_pfn
static inline unsigned long page_to_boot_pfn(struct page *page)
@@ -456,6 +470,16 @@ static inline phys_addr_t boot_phys_to_phys(unsigned long boot_phys)
}
#endif
+#ifndef crash_free_reserved_phys_range
+static inline void crash_free_reserved_phys_range(unsigned long begin, unsigned long end)
+{
+ unsigned long addr;
+
+ for (addr = begin; addr < end; addr += PAGE_SIZE)
+ free_reserved_page(boot_pfn_to_page(addr >> PAGE_SHIFT));
+}
+#endif
+
static inline unsigned long virt_to_boot_phys(void *addr)
{
return phys_to_boot_phys(__pa((unsigned long)addr));
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 4d34c78334ce41..acd029b307e42d 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -591,11 +591,6 @@ static void kimage_free_extra_pages(struct kimage *image)
}
-int __weak machine_kexec_post_load(struct kimage *image)
-{
- return 0;
-}
-
void kimage_terminate(struct kimage *image)
{
if (*image->entry != 0)
@@ -1020,15 +1015,6 @@ size_t crash_get_memory_size(void)
return size;
}
-void __weak crash_free_reserved_phys_range(unsigned long begin,
- unsigned long end)
-{
- unsigned long addr;
-
- for (addr = begin; addr < end; addr += PAGE_SIZE)
- free_reserved_page(boot_pfn_to_page(addr >> PAGE_SHIFT));
-}
-
int crash_shrink_memory(unsigned long new_size)
{
int ret = 0;
@@ -1225,16 +1211,3 @@ int kernel_kexec(void)
mutex_unlock(&kexec_mutex);
return error;
}
-
-/*
- * Protection mechanism for crashkernel reserved memory after
- * the kdump kernel is loaded.
- *
- * Provide an empty default implementation here -- architecture
- * code may override this
- */
-void __weak arch_kexec_protect_crashkres(void)
-{}
-
-void __weak arch_kexec_unprotect_crashkres(void)
-{}
--
2.36.1
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