x86/asm/64: Micro-optimize __clear_user() - Use immediate constants

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Save two registers. Adding constants should be just as fast as adding registers.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180507213937.GB32406@avx2
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Alexey Dobriyan 2018-05-08 00:39:37 +03:00 • committed by Ingo Molnar

parent 67b8d5c708

commit 1153933703

1 changed files with 4 additions and 5 deletions

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arch/x86/lib/usercopy_64.c

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