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(parent: 67b8d5c) | patch
x86/asm/64: Micro-optimize __clear_user() - Use immediate constants
authorAlexey Dobriyan <adobriyan@gmail.com>
Mon, 7 May 2018 21:39:37 +0000 (00:39 +0300)
committerIngo Molnar <mingo@kernel.org>
Mon, 14 May 2018 09:38:51 +0000 (11:38 +0200)
commit1153933703d927b3d4874c0bc801de32b1b58be9
treee2ace18c80c137e9feb056c4c6e5e4bb7a47e7a2tree | snapshot
parent67b8d5c7081221efa252e111cd52532ec6d4266fcommit | diff
x86/asm/64: Micro-optimize __clear_user() - Use immediate constants

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>
arch/x86/lib/usercopy_64.c diff | blob | history
Domain: System / Kernel;