perf: Generalize callchain_store()

callchain_store() is the same on every archs, inline it in
perf_event.h and rename it to perf_callchain_store() to avoid
any collision.

This removes repetitive code.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Tested-by: Will Deacon <will.deacon@arm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Borislav Petkov <bp@amd64.org>

1 files changed, 4 insertions, 11 deletions

diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index fdcb0be47df1..a07c3b1955f0 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -3001,13 +3001,6 @@ arch_initcall(init_hw_perf_events);
 /*
  * Callchain handling code.
  */
-static inline void
-callchain_store(struct perf_callchain_entry *entry,
-                u64 ip)
-{
-        if (entry->nr < PERF_MAX_STACK_DEPTH)
-                entry->ip[entry->nr++] = ip;
-}
 
 /*
  * The registers we're interested in are at the end of the variable
@@ -3039,7 +3032,7 @@ user_backtrace(struct frame_tail *tail,
         if (__copy_from_user_inatomic(&buftail, tail, sizeof(buftail)))
                 return NULL;
 
-        callchain_store(entry, buftail.lr);
+        perf_callchain_store(entry, buftail.lr);
 
         /*
          * Frame pointers should strictly progress back up the stack
@@ -3057,7 +3050,7 @@ perf_callchain_user(struct pt_regs *regs,
 {
         struct frame_tail *tail;
 
-        callchain_store(entry, PERF_CONTEXT_USER);
+        perf_callchain_store(entry, PERF_CONTEXT_USER);
 
         if (!user_mode(regs))
                 regs = task_pt_regs(current);
@@ -3078,7 +3071,7 @@ callchain_trace(struct stackframe *fr,
                 void *data)
 {
         struct perf_callchain_entry *entry = data;
-        callchain_store(entry, fr->pc);
+        perf_callchain_store(entry, fr->pc);
         return 0;
 }
 
@@ -3088,7 +3081,7 @@ perf_callchain_kernel(struct pt_regs *regs,
 {
         struct stackframe fr;
 
-        callchain_store(entry, PERF_CONTEXT_KERNEL);
+        perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
         fr.fp = regs->ARM_fp;
         fr.sp = regs->ARM_sp;
         fr.lr = regs->ARM_lr;