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x86/perf: Use static_call for x86_pmu.guest_get_msrs

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Clean up that CONFIG_RETPOLINE crud and replace the
indirect call x86_pmu.guest_get_msrs with static_call().

Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210125121458.181635-1-like.xu@linux.intel.com
This commit is contained in:
Like Xu
2021-01-25 20:14:58 +08:00
committed by Peter Zijlstra
parent 9a7832ce3d
commit abd562df94
3 changed files with 21 additions and 25 deletions
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6
arch/x86/include/asm/perf_event.h
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@@ -483,11 +483,7 @@ static inline void perf_check_microcode(void) { }
extern struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
extern int x86_perf_get_lbr(struct x86_pmu_lbr *lbr);
#else
static inline struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr)
{
*nr = 0;
return NULL;
}
struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
static inline int x86_perf_get_lbr(struct x86_pmu_lbr *lbr)
{
return -1;