From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Mon, 9 May 2011 17:20:19 +1000 From: Anton Blanchard To: benh@kernel.crashing.org, linuxppc-dev@ozlabs.org Subject: [PATCH] powerpc: Remove static branch hint in giveup_altivec Message-ID: <20110509172019.6733177e@kryten> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- Index: linux-powerpc/arch/powerpc/kernel/vector.S =================================================================== --- linux-powerpc.orig/arch/powerpc/kernel/vector.S 2011-04-24 12:38:26.329650611 +1000 +++ linux-powerpc/arch/powerpc/kernel/vector.S 2011-04-24 12:39:27.850785617 +1000 @@ -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