From 641bd53a615b35d7a2e9a3de764e7c4953948679 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Tue, 22 May 2012 17:58:41 +0000 Subject: powerpc: Enable jump label support When looking through some instruction traces I noticed our tracepoint checks were inline. It turns out we don't have CONFIG_JUMP_LABEL enabled. By enabling CONFIG_JUMP_LABEL we replace a load/compare/branch with a nop at every tracepoint call. For example in do_IRQ: CONFIG_JUMP_LABEL disabled: stdx 3,11,9 lwz 0,8(29) cmpwi 7,0,0 bne- 7,.L124 bl .irq_enter CONFIG_JUMP_LABEL enabled: stdx 3,11,9 nop bl .irq_enter Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/configs/ppc64_defconfig | 1 + arch/powerpc/configs/pseries_defconfig | 1 + 2 files changed, 2 insertions(+) (limited to 'arch/powerpc') diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig index c1442a3758ae..273e2bd38d06 100644 --- a/arch/powerpc/configs/ppc64_defconfig +++ b/arch/powerpc/configs/ppc64_defconfig @@ -16,6 +16,7 @@ CONFIG_BLK_DEV_INITRD=y CONFIG_PROFILING=y CONFIG_OPROFILE=y CONFIG_KPROBES=y +CONFIG_JUMP_LABEL=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y CONFIG_MODVERSIONS=y diff --git a/arch/powerpc/configs/pseries_defconfig b/arch/powerpc/configs/pseries_defconfig index 6608232663cb..187fb8d53605 100644 --- a/arch/powerpc/configs/pseries_defconfig +++ b/arch/powerpc/configs/pseries_defconfig @@ -24,6 +24,7 @@ CONFIG_BLK_DEV_INITRD=y CONFIG_PROFILING=y CONFIG_OPROFILE=y CONFIG_KPROBES=y +CONFIG_JUMP_LABEL=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y CONFIG_MODVERSIONS=y -- cgit v1.2.3