Commit a5fc5eba authored Dec 04, 2009 by David Daney Committed by Linus Torvalds Dec 05, 2009

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>

parent 38938c87

arch/x86/include/asm/bug.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -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