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authorFrederic Weisbecker <fweisbec@gmail.com>2010-05-20 07:47:21 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-06-08 23:31:27 +0200
commitb0f82b81fe6bbcf78d478071f33e44554726bc81 (patch)
tree6305c095b927f956a791b9dce687cb94a21718e6 /arch/sparc
parentc9cf4dbb4d9ca715d8fedf13301a53296429abc6 (diff)
perf: Drop the skip argument from perf_arch_fetch_regs_caller
Drop this argument now that we always want to rewind only to the state of the first caller. It means frame pointers are not necessary anymore to reliably get the source of an event. But this also means we need this helper to be a macro now, as an inline function is not an option since we need to know when to provide a default implentation. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: David Miller <davem@davemloft.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/perf_event.h8
-rw-r--r--arch/sparc/kernel/helpers.S6
2 files changed, 11 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/perf_event.h b/arch/sparc/include/asm/perf_event.h
index 7e2669894ce..74c4e0cd889 100644
--- a/arch/sparc/include/asm/perf_event.h
+++ b/arch/sparc/include/asm/perf_event.h
@@ -6,7 +6,15 @@ extern void set_perf_event_pending(void);
#define PERF_EVENT_INDEX_OFFSET 0
#ifdef CONFIG_PERF_EVENTS
+#include <asm/ptrace.h>
+
extern void init_hw_perf_events(void);
+
+extern void
+__perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
+
+#define perf_arch_fetch_caller_regs(pt_regs, ip) \
+ __perf_arch_fetch_caller_regs(pt_regs, ip, 1);
#else
static inline void init_hw_perf_events(void) { }
#endif
diff --git a/arch/sparc/kernel/helpers.S b/arch/sparc/kernel/helpers.S
index 92090cc9e82..682fee06a16 100644
--- a/arch/sparc/kernel/helpers.S
+++ b/arch/sparc/kernel/helpers.S
@@ -47,9 +47,9 @@ stack_trace_flush:
.size stack_trace_flush,.-stack_trace_flush
#ifdef CONFIG_PERF_EVENTS
- .globl perf_arch_fetch_caller_regs
- .type perf_arch_fetch_caller_regs,#function
-perf_arch_fetch_caller_regs:
+ .globl __perf_arch_fetch_caller_regs
+ .type __perf_arch_fetch_caller_regs,#function
+__perf_arch_fetch_caller_regs:
/* We always read the %pstate into %o5 since we will use
* that to construct a fake %tstate to store into the regs.
*/