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| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2016-09-06 15:23:53 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-09-10 11:15:38 +0200 |
| commit | ef9ef3befa0d76008e988a9ed9fe439e803351b9 (patch) | |
| tree | fdd5c4c63792e747a707bb950162676e193f0bfd /arch/x86 | |
| parent | perf/x86/intel/bts: Fix BTS PMI detection (diff) | |
| download | linux-ef9ef3befa0d76008e988a9ed9fe439e803351b9.tar.xz linux-ef9ef3befa0d76008e988a9ed9fe439e803351b9.zip | |
perf/x86/intel/bts: Kill a silly warning
At the moment, intel_bts will WARN() out if there is more than one
event writing to the same ring buffer, via SET_OUTPUT, and will only
send data from one event to a buffer.
There is no reason to have this warning in, so kill it.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
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@deater.net
Link: http://lkml.kernel.org/r/20160906132353.19887-6-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/events/intel/bts.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/events/intel/bts.c b/arch/x86/events/intel/bts.c index 9233edf993e1..bdcd6510992c 100644 --- a/arch/x86/events/intel/bts.c +++ b/arch/x86/events/intel/bts.c @@ -378,8 +378,6 @@ bts_buffer_reset(struct bts_buffer *buf, struct perf_output_handle *handle) return 0; head = handle->head & ((buf->nr_pages << PAGE_SHIFT) - 1); - if (WARN_ON_ONCE(head != local_read(&buf->head))) - return -EINVAL; phys = &buf->buf[buf->cur_buf]; space = phys->offset + phys->displacement + phys->size - head; |