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| author | Anton Blanchard <anton@samba.org> | 2012-05-22 19:58:41 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-07-03 06:14:40 +0200 |
| commit | 641bd53a615b35d7a2e9a3de764e7c4953948679 (patch) | |
| tree | 3d7b21aa7864e4fe86f80ddbfabfadb5c619b6cf /arch/powerpc/configs/mgcoge_defconfig | |
| parent | powerpc/pseries/cpuidle: Replace pseries_notify_cpuidle_add call with notifier (diff) | |
| download | linux-641bd53a615b35d7a2e9a3de764e7c4953948679.tar.xz linux-641bd53a615b35d7a2e9a3de764e7c4953948679.zip | |
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 <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/configs/mgcoge_defconfig')
0 files changed, 0 insertions, 0 deletions