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perf/x86: Fix fall-through warnings for Clang

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In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a fallthrough pseudo-keyword as a replacement for
a /* fall through */ comment, instead of letting the code fall through
to the next case.

Notice that Clang doesn't recognize /* fall through */ comments as
implicit fall-through markings.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://github.com/KSPP/linux/issues/115
This commit is contained in:
Gustavo A. R. Silva 2020-11-20 12:31:36 -06:00 committed by Peter Zijlstra
parent e689b300c9
commit b645957545
1 changed files with 1 additions and 1 deletions
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2
arch/x86/events/core.c
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@ -1174,7 +1174,7 @@ static inline void x86_assign_hw_event(struct perf_event *event,
case INTEL_PMC_IDX_METRIC_BASE ... INTEL_PMC_IDX_METRIC_END:
/* All the metric events are mapped onto the fixed counter 3. */
idx = INTEL_PMC_IDX_FIXED_SLOTS;
/* fall through */
fallthrough;
case INTEL_PMC_IDX_FIXED ... INTEL_PMC_IDX_FIXED_BTS-1:
hwc->config_base = MSR_ARCH_PERFMON_FIXED_CTR_CTRL;
hwc->event_base = MSR_ARCH_PERFMON_FIXED_CTR0 +