x86/64: Adjust types of temporaries used by ffs()/fls()/fls64()

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The 64-bit special cases of the former two (the thrird one is
64-bit only anyway) don't need to use "long" temporaries, as the
result will always fit in a 32-bit variable, and the functions
return plain "int". This avoids a few REX prefixes, i.e.
minimally reduces code size.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/504DE550020000780009A258@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Jan Beulich 2012-09-10 12:04:16 +01:00 • committed by Ingo Molnar

parent 6eebdda35e

commit 1edfbb4153

1 changed files with 4 additions and 6 deletions

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arch/x86/include/asm/bitops.h

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