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authorDavid Daney <ddaney@caviumnetworks.com>2009-12-04 17:44:51 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-05 09:10:12 -0800
commita5fc5eba4dfcc284e6adcd7fdcd5b43182230d2b (patch)
tree2771bcf886ea10c88759445c0c4599bfca20b5e8
parent38938c879eb0c39edf85d5164aa0cffe2874304c (diff)
downloadblackbird-op-linux-a5fc5eba4dfcc284e6adcd7fdcd5b43182230d2b.tar.gz
blackbird-op-linux-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>
-rw-r--r--arch/x86/include/asm/bug.h4
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
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