perf: Factorize callchain context handling

Store the kernel and user contexts from the generic layer instead
of archs, this gathers some 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, 1 deletions

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 02efde6c879..615d024894c 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -2969,6 +2969,7 @@ static struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
         entry->nr = 0;
 
         if (!user_mode(regs)) {
+                perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
                 perf_callchain_kernel(entry, regs);
                 if (current->mm)
                         regs = task_pt_regs(current);
@@ -2976,8 +2977,10 @@ static struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
                         regs = NULL;
         }
 
-        if (regs)
+        if (regs) {
+                perf_callchain_store(entry, PERF_CONTEXT_USER);
                 perf_callchain_user(entry, regs);
+        }
 
         return entry;
 }