diff options
| author |   David Daney <ddaney@caviumnetworks.com> | 2009-12-04 17:44:51 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-05 09:10:12 -0800 |
| commit | a5fc5eba4dfcc284e6adcd7fdcd5b43182230d2b (patch) | |
| tree | 2771bcf886ea10c88759445c0c4599bfca20b5e8 /arch/x86/include/asm/bug.h | |
| parent | Add support for GCC-4.5's __builtin_unreachable() to compiler.h (v2) (diff) | |
| download | linux-dev-a5fc5eba4dfcc284e6adcd7fdcd5b43182230d2b.tar.xz linux-dev-a5fc5eba4dfcc284e6adcd7fdcd5b43182230d2b.zip | |
x86: Convert BUG() to use unreachable()
Use the new unreachable() macro instead of for(;;);. When
allyesconfig is built with a GCC-4.5 snapshot on i686 the size of the
text segment is reduced by 3987 bytes (from 6827019 to 6823032).
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@redhat.com>
CC: x86@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/bug.h')
| -rw-r--r-- | arch/x86/include/asm/bug.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h index d9cf1cd156d2..f654d1bb17fb 100644 --- a/arch/x86/include/asm/bug.h +++ b/arch/x86/include/asm/bug.h @@ -22,14 +22,14 @@ do { \ ".popsection" \ : : "i" (__FILE__), "i" (__LINE__), \ "i" (sizeof(struct bug_entry))); \ - for (;;) ; \ + unreachable(); \ } while (0) #else #define BUG() \ do { \ asm volatile("ud2"); \ - for (;;) ; \ + unreachable(); \ } while (0) #endif |