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| author | Jiri Olsa <jolsa@kernel.org> | 2018-01-07 17:03:49 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-01-08 12:33:01 -0300 |
| commit | 8cf7e0e22414f5acf85ecb7cd0d4482e6c9696ae (patch) | |
| tree | 1fd72714d9a85843238105fafc6b0439f4f327f1 /kernel/events/core.c | |
| parent | 81df978c49379481716aef591de77313c286d747 (diff) | |
| download | linux-8cf7e0e22414f5acf85ecb7cd0d4482e6c9696ae.tar.bz2 | |
perf: Make perf_callchain function static
And move it to core.c, because there's no caller of this function other
than the one in core.c
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180107160356.28203-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel/events/core.c')
| -rw-r--r-- | kernel/events/core.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 55fb648a32b0..5fc1ded4b450 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -5980,6 +5980,22 @@ static u64 perf_virt_to_phys(u64 virt) return phys_addr; } +static struct perf_callchain_entry * +perf_callchain(struct perf_event *event, struct pt_regs *regs) +{ + bool kernel = !event->attr.exclude_callchain_kernel; + bool user = !event->attr.exclude_callchain_user; + /* Disallow cross-task user callchains. */ + bool crosstask = event->ctx->task && event->ctx->task != current; + const u32 max_stack = event->attr.sample_max_stack; + + if (!kernel && !user) + return NULL; + + return get_perf_callchain(regs, 0, kernel, user, + max_stack, crosstask, true); +} + void perf_prepare_sample(struct perf_event_header *header, struct perf_sample_data *data, struct perf_event *event, |