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perf: Fix typos in sample code in the perf_event.h header

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struct perf_event_mmap_page has members called "index" and
"cap_user_rdpmc".  Spell them correctly in the examples.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-api@vger.kernel.org
Link: http://lkml.kernel.org/r/320ba26391a8123cc16e5f02d24d34bd404332fd.1412313343.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andy Lutomirski 2014-10-02 22:16:36 -07:00 committed by Ingo Molnar
parent c719f56092
commit b438b1ab35
1 changed files with 7 additions and 7 deletions
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14
include/uapi/linux/perf_event.h
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@ -364,7 +364,7 @@ struct perf_event_mmap_page {
/*
* Bits needed to read the hw events in user-space.
*
* u32 seq, time_mult, time_shift, idx, width;
* u32 seq, time_mult, time_shift, index, width;
* u64 count, enabled, running;
* u64 cyc, time_offset;
* s64 pmc = 0;
@ -383,11 +383,11 @@ struct perf_event_mmap_page {
* time_shift = pc->time_shift;
* }
*
* idx = pc->index;
* index = pc->index;
* count = pc->offset;
* if (pc->cap_usr_rdpmc && idx) {
* if (pc->cap_user_rdpmc && index) {
* width = pc->pmc_width;
* pmc = rdpmc(idx - 1);
* pmc = rdpmc(index - 1);
* }
*
* barrier();
@ -415,7 +415,7 @@ struct perf_event_mmap_page {
};
/*
* If cap_usr_rdpmc this field provides the bit-width of the value
* If cap_user_rdpmc this field provides the bit-width of the value
* read using the rdpmc() or equivalent instruction. This can be used
* to sign extend the result like:
*
@ -439,10 +439,10 @@ struct perf_event_mmap_page {
*
* Where time_offset,time_mult,time_shift and cyc are read in the
* seqcount loop described above. This delta can then be added to
* enabled and possible running (if idx), improving the scaling:
* enabled and possible running (if index), improving the scaling:
*
* enabled += delta;
* if (idx)
* if (index)
* running += delta;
*
* quot = count / running;