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perf/x86/msr: Clean up the code

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Recent changes made a bit of an inconsistent mess out of arch/x86/events/msr.c,
fix it:

 - re-align the initialization tables to be vertically aligned and readable again

 - harmonize comment style in terms of punctuation, capitalization and spelling

 - use curly braces for multi-condition branches

 - remove extra newlines

 - simplify the code a bit

Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: kan.liang@intel.com
Link: http://lkml.kernel.org/r/1515169132-3980-1-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2018-01-05 08:18:52 -08:00
parent 9ae21dd66b
commit 9128d3ed9d
1 changed files with 29 additions and 32 deletions
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15
arch/x86/events/msr.c
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@ -36,7 +36,6 @@ static bool test_therm_status(int idx)
return boot_cpu_has(X86_FEATURE_DTHERM);
}
static bool test_intel(int idx)
{
if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL ||
@ -198,7 +197,7 @@ static void msr_event_update(struct perf_event *event)
u64 prev, now;
s64 delta;
/* Careful, an NMI might modify the previous event value. */
/* Careful, an NMI might modify the previous event value: */
again:
prev = local64_read(&event->hw.prev_count);
now = msr_read_counter(event);
@ -211,18 +210,18 @@ static void msr_event_update(struct perf_event *event)
delta = sign_extend64(delta, 31);
local64_add(delta, &event->count);
} else if (unlikely(event->hw.event_base == MSR_IA32_THERM_STATUS)) {
/* if valid, extract digital readout, other set to -1 */
/* If valid, extract digital readout, otherwise set to -1: */
now = now & (1ULL << 31) ? (now >> 16) & 0x3f : -1;
local64_set(&event->count, now);
} else
} else {
local64_add(delta, &event->count);
}
}
static void msr_event_start(struct perf_event *event, int flags)
{
u64 now;
u64 now = msr_read_counter(event);
now = msr_read_counter(event);
local64_set(&event->hw.prev_count, now);
}
@ -269,9 +268,7 @@ static int __init msr_init(void)
for (i = PERF_MSR_TSC + 1; i < PERF_MSR_EVENT_MAX; i++) {
u64 val;
/*
* Virt sucks arse; you cannot tell if a R/O MSR is present :/
*/
/* Virt sucks; you cannot tell if a R/O MSR is present :/ */
if (!msr[i].test(i) || rdmsrl_safe(msr[i].msr, &val))
msr[i].attr = NULL;
}