Christophe Leroy cd99ddbea2 powerpc/8xx: Only perform perf counting when perf is in use. ... In TLB miss handlers, updating the perf counter is only useful when performing a perf analysis. As it has a noticeable overhead, let's only do it when needed. In order to do so, the exit of the miss handlers will be patched when starting/stopping 'perf': the first register restore instruction of each exit point will be replaced by a jump to the counting code. Once this is done, CONFIG_PPC_8xx_PERF_EVENT becomes useless as this feature doesn't add any overhead. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-01-16 23:47:12 +11:00
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asm	powerpc/8xx: Only perform perf counting when perf is in use.	2018-01-16 23:47:12 +11:00
uapi/asm	powerpc updates for 4.15	2017-11-16 12:47:46 -08:00