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fix "ftrace: store mcount address in rec->ip"

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Alexander Beregalov reported this build failure:

$ make CROSS_COMPILE=sparc64-unknown-linux-gnu- image modules && sudo
make modules_install
  CHK     include/linux/version.h
  CHK     include/linux/utsrelease.h
  CALL    scripts/checksyscalls.sh
  CHK     include/linux/compile.h
dnsdomainname: Unknown host
  CC      arch/sparc64/kernel/sparc64_ksyms.o
arch/sparc64/kernel/sparc64_ksyms.c:116: error: '_mcount' undeclared
here (not in a function)
cc1: warnings being treated as errors
arch/sparc64/kernel/sparc64_ksyms.c:116: error: type defaults to 'int'
in declaration of '_mcount'

And bisected it back to:

| commit 395a59d0f8
| Author: Abhishek Sagar <sagar.abhishek@gmail.com>
| Date:   Sat Jun 21 23:47:27 2008 +0530
|
|     ftrace: store mcount address in rec->ip

the mcount prototype is only available under CONFIG_FTRACE,
extend it to CONFIG_MCOUNT as well.

Reported-and-bisected-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-07-01 17:35:06 +02:00
parent 3e61e0c976
commit 760378e149
2 changed files with 2 additions and 2 deletions
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2
arch/sparc64/kernel/sparc64_ksyms.c
View file

@ -112,7 +112,7 @@ EXPORT_SYMBOL(__write_trylock);
EXPORT_SYMBOL(smp_call_function);
#endif /* CONFIG_SMP */
#if defined(CONFIG_MCOUNT)
#ifdef CONFIG_MCOUNT
EXPORT_SYMBOL(_mcount);
#endif

2
include/asm-sparc64/ftrace.h
View file

@ -1,7 +1,7 @@
#ifndef _ASM_SPARC64_FTRACE
#define _ASM_SPARC64_FTRACE
#ifdef CONFIG_FTRACE
#ifdef CONFIG_MCOUNT
#define MCOUNT_ADDR ((long)(_mcount))
#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */