Commit ba00ce1d authored May 08, 2011 by Anton Blanchard Committed by Benjamin Herrenschmidt May 19, 2011

powerpc: Remove static branch hint in giveup_altivec



A static branch hint will override dynamic branch prediction on
recent POWER CPUs. Since we are about to use more altivec in the
kernel remove the static hint in giveup_altivec that assumes
a userspace task is using altivec.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent d988f0e3

arch/powerpc/kernel/vector.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -102,7 +102,7 @@ _GLOBAL(giveup_altivec)
		MTMSRD(r5) /* enable use of VMX now */
		isync
		PPC_LCMPI 0,r3,0
		beqlr- /* if no previous owner, done */
		beqlr /* if no previous owner, done */
		addi r3,r3,THREAD /* want THREAD of task */
		PPC_LL r5,PT_REGS(r3)
		PPC_LCMPI 0,r5,0