powerpc/64: Remove static branch hints from memset()

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

Static branch hints override dynamic branch prediction on recent
POWER CPUs. We should only use them when we are overwhelmingly
sure of the direction.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

authored by

Anton Blanchard and committed by

Michael Ellerman 7 years ago be54c121 ba2dd8a2

+2 -2

1 changed file

expand all

arch

powerpc

lib

mem_64.S

+2 -2

arch/powerpc/lib/mem_64.S

··· 40 40 .Lms: PPC_MTOCRF(1,r0) 41 41 mr r6,r3 42 42 blt cr1,8f 43 - beq+ 3f /* if already 8-byte aligned */ 43 + beq 3f /* if already 8-byte aligned */ 44 44 subf r5,r0,r5 45 45 bf 31,1f 46 46 stb r4,0(r6) ··· 85 85 addi r6,r6,8 86 86 8: cmpwi r5,0 87 87 PPC_MTOCRF(1,r5) 88 - beqlr+ 88 + beqlr 89 89 bf 29,9f 90 90 stw r4,0(r6) 91 91 addi r6,r6,4