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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>
This commit is contained in:
Jiri Olsa 2018-01-07 17:03:49 +01:00 committed by Arnaldo Carvalho de Melo
parent 81df978c49
commit 8cf7e0e224
3 changed files with 16 additions and 19 deletions
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15
kernel/events/callchain.c
View File

@ -178,21 +178,6 @@ put_callchain_entry(int rctx)
put_recursion_context(this_cpu_ptr(callchain_recursion), rctx);
}
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);
}
struct perf_callchain_entry *
get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
u32 max_stack, bool crosstask, bool add_mark)

16
kernel/events/core.c
View File

@ -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,

4
kernel/events/internal.h
View File

@ -201,10 +201,6 @@ arch_perf_out_copy_user(void *dst, const void *src, unsigned long n)
DEFINE_OUTPUT_COPY(__output_copy_user, arch_perf_out_copy_user)
/* Callchain handling */
extern struct perf_callchain_entry *
perf_callchain(struct perf_event *event, struct pt_regs *regs);
static inline int get_recursion_context(int *recursion)
{
int rctx;