From 8cf7e0e22414f5acf85ecb7cd0d4482e6c9696ae Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Sun, 7 Jan 2018 17:03:49 +0100 Subject: 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 Cc: Alexander Shishkin Cc: Andi Kleen Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20180107160356.28203-6-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- kernel/events/callchain.c | 15 --------------- kernel/events/core.c | 16 ++++++++++++++++ kernel/events/internal.h | 4 ---- 3 files changed, 16 insertions(+), 19 deletions(-) diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c index 1b2be63c8528..772a43fea825 100644 --- a/kernel/events/callchain.c +++ b/kernel/events/callchain.c @@ -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) 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, diff --git a/kernel/events/internal.h b/kernel/events/internal.h index 09b1537ae06c..6dc725a7e7bc 100644 --- a/kernel/events/internal.h +++ b/kernel/events/internal.h @@ -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; -- cgit v1.2.3