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Message-ID: <20170330154927.o6qmgfp4bdhrajbm@hirez.programming.kicks-ass.net>
Date: Thu, 30 Mar 2017 17:49:27 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: kbuild test robot <fengguang.wu@...el.com>
Cc: kbuild-all@...org, linux-kernel@...r.kernel.org,
tipbuild@...or.com, Ingo Molnar <mingo@...nel.org>
Subject: Re: [tip:x86/asm 3/3] lib/bug.c:135: undefined reference to
`__start___bug_table'
On Thu, Mar 30, 2017 at 09:02:31PM +0800, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/asm
> head: 19d436268dde95389c616bb3819da73f0a8b28a8
> commit: 19d436268dde95389c616bb3819da73f0a8b28a8 [3/3] debug: Add _ONCE() logic to report_bug()
> config: arm-efm32_defconfig (attached as .config)
> compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
> wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> git checkout 19d436268dde95389c616bb3819da73f0a8b28a8
> # save the attached .config to linux build tree
> make.cross ARCH=arm
>
> All errors (new ones prefixed by >>):
>
> lib/lib.a(bug.o): In function `find_bug':
> >> lib/bug.c:135: undefined reference to `__start___bug_table'
> >> lib/bug.c:135: undefined reference to `__stop___bug_table'
Blergh.. this cures it for me.
Ideally all those would use RW_DATA_SECTION, but alas.
---
arch/arm/kernel/vmlinux-xip.lds.S | 2 ++
arch/arm/kernel/vmlinux.lds.S | 2 ++
arch/avr32/kernel/vmlinux.lds.S | 1 +
arch/blackfin/kernel/vmlinux.lds.S | 2 ++
arch/c6x/kernel/vmlinux.lds.S | 2 ++
arch/cris/kernel/vmlinux.lds.S | 2 ++
arch/frv/kernel/vmlinux.lds.S | 2 ++
arch/ia64/kernel/vmlinux.lds.S | 2 ++
arch/mips/kernel/vmlinux.lds.S | 1 +
arch/powerpc/kernel/vmlinux.lds.S | 2 ++
arch/x86/kernel/vmlinux.lds.S | 1 +
11 files changed, 19 insertions(+)
diff --git a/arch/arm/kernel/vmlinux-xip.lds.S b/arch/arm/kernel/vmlinux-xip.lds.S
index 37b2a11..8265b11 100644
--- a/arch/arm/kernel/vmlinux-xip.lds.S
+++ b/arch/arm/kernel/vmlinux-xip.lds.S
@@ -242,6 +242,8 @@ SECTIONS
}
_edata_loc = __data_loc + SIZEOF(.data);
+ BUG_TABLE
+
#ifdef CONFIG_HAVE_TCM
/*
* We align everything to a page boundary so we can
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index ce18007..c83a7ba 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -262,6 +262,8 @@ SECTIONS
}
_edata_loc = __data_loc + SIZEOF(.data);
+ BUG_TABLE
+
#ifdef CONFIG_HAVE_TCM
/*
* We align everything to a page boundary so we can
diff --git a/arch/avr32/kernel/vmlinux.lds.S b/arch/avr32/kernel/vmlinux.lds.S
index 17f2730..623d18d 100644
--- a/arch/avr32/kernel/vmlinux.lds.S
+++ b/arch/avr32/kernel/vmlinux.lds.S
@@ -75,6 +75,7 @@ SECTIONS
_edata = .;
}
+ BUG_TABLE
BSS_SECTION(0, 8, 8)
_end = .;
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
index 68069a1..334ef81 100644
--- a/arch/blackfin/kernel/vmlinux.lds.S
+++ b/arch/blackfin/kernel/vmlinux.lds.S
@@ -115,6 +115,8 @@ SECTIONS
__data_lma = LOADADDR(.data);
__data_len = SIZEOF(.data);
+ BUG_TABLE
+
/* The init section should be last, so when we free it, it goes into
* the general memory pool, and (hopefully) will decrease fragmentation
* a tiny bit. The init section has a _requirement_ that it be
diff --git a/arch/c6x/kernel/vmlinux.lds.S b/arch/c6x/kernel/vmlinux.lds.S
index a1a5c16..29ebea4 100644
--- a/arch/c6x/kernel/vmlinux.lds.S
+++ b/arch/c6x/kernel/vmlinux.lds.S
@@ -128,6 +128,8 @@ SECTIONS
. = ALIGN(8);
}
+ BUG_TABLE
+
_edata = .;
__bss_start = .;
diff --git a/arch/cris/kernel/vmlinux.lds.S b/arch/cris/kernel/vmlinux.lds.S
index 9795862..867f237 100644
--- a/arch/cris/kernel/vmlinux.lds.S
+++ b/arch/cris/kernel/vmlinux.lds.S
@@ -68,6 +68,8 @@ SECTIONS
__edata = . ; /* End of data section. */
_edata = . ;
+ BUG_TABLE
+
INIT_TASK_DATA_SECTION(PAGE_SIZE)
. = ALIGN(PAGE_SIZE); /* Init code and data. */
diff --git a/arch/frv/kernel/vmlinux.lds.S b/arch/frv/kernel/vmlinux.lds.S
index aa6e573..3f44dcb 100644
--- a/arch/frv/kernel/vmlinux.lds.S
+++ b/arch/frv/kernel/vmlinux.lds.S
@@ -102,6 +102,8 @@ SECTIONS
_edata = .; /* End of data section */
+ BUG_TABLE
+
/* GP section */
. = ALIGN(L1_CACHE_BYTES);
_gp = . + 2048;
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index f89d20c..798026d 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -192,6 +192,8 @@ SECTIONS {
CONSTRUCTORS
}
+ BUG_TABLE
+
. = ALIGN(16); /* gp must be 16-byte aligned for exc. table */
.got : AT(ADDR(.got) - LOAD_OFFSET) {
*(.got.plt)
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index f0a0e6d..8ca2371 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -97,6 +97,7 @@ SECTIONS
DATA_DATA
CONSTRUCTORS
}
+ BUG_TABLE
_gp = . + 0x8000;
.lit8 : {
*(.lit8)
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 7394b77..1c24c89 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -312,6 +312,8 @@ SECTIONS
NOSAVE_DATA
}
+ BUG_TABLE
+
. = ALIGN(PAGE_SIZE);
_edata = .;
PROVIDE32 (edata = .);
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index c74ae9c..c8a3b61 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -146,6 +146,7 @@ SECTIONS
_edata = .;
} :data
+ BUG_TABLE
. = ALIGN(PAGE_SIZE);
__vvar_page = .;
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