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perf/x86/intel/lbr: Mark the {rd,wr}lbr_{to,from} wrappers __always_inline

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The {rd,wr}lbr_{to,from} wrappers are invoked in hot paths, e.g. context
switch and NMI handler. They should be always inline to achieve better
performance. However, the CONFIG_OPTIMIZE_INLINING allows the compiler
to uninline functions marked 'inline'.

Mark the {rd,wr}lbr_{to,from} wrappers as __always_inline to force
inline the wrappers.

Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1593780569-62993-12-git-send-email-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang
2020-07-03 05:49:17 -07:00
committed by Peter Zijlstra
parent 5624986dc6
commit 020d91e5f3
1 changed files with 4 additions and 4 deletions
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8
arch/x86/events/intel/lbr.c
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@@ -332,18 +332,18 @@ static u64 lbr_from_signext_quirk_rd(u64 val)
return val;
}
static inline void wrlbr_from(unsigned int idx, u64 val)
static __always_inline void wrlbr_from(unsigned int idx, u64 val)
{
val = lbr_from_signext_quirk_wr(val);
wrmsrl(x86_pmu.lbr_from + idx, val);
}
static inline void wrlbr_to(unsigned int idx, u64 val)
static __always_inline void wrlbr_to(unsigned int idx, u64 val)
{
wrmsrl(x86_pmu.lbr_to + idx, val);
}
static inline u64 rdlbr_from(unsigned int idx)
static __always_inline u64 rdlbr_from(unsigned int idx)
{
u64 val;
@@ -352,7 +352,7 @@ static inline u64 rdlbr_from(unsigned int idx)
return lbr_from_signext_quirk_rd(val);
}
static inline u64 rdlbr_to(unsigned int idx)
static __always_inline u64 rdlbr_to(unsigned int idx)
{
u64 val;