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Date: Thu, 1 Jul 2010 17:36:00 +0200
From: Frederic Weisbecker <fweisbec@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...e.hu>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Paul Mackerras <paulus@...ba.org>,
Stephane Eranian <eranian@...gle.com>,
David Miller <davem@...emloft.net>,
Paul Mundt <lethal@...ux-sh.org>,
Will Deacon <will.deacon@....com>,
Borislav Petkov <bp@...64.org>
Subject: [RFC PATCH 4/6] 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@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: David Miller <davem@...emloft.net>
Cc: Paul Mundt <lethal@...ux-sh.org>
Cc: Will Deacon <will.deacon@....com>
Cc: Borislav Petkov <bp@...64.org>
---
arch/arm/kernel/perf_event.c | 2 --
arch/powerpc/kernel/perf_callchain.c | 3 ---
arch/sh/kernel/perf_callchain.c | 1 -
arch/sparc/kernel/perf_event.c | 3 ---
arch/x86/kernel/cpu/perf_event.c | 2 --
kernel/perf_event.c | 5 ++++-
6 files changed, 4 insertions(+), 12 deletions(-)
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index ddb5134..8df0f8c 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -3049,7 +3049,6 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
struct frame_tail *tail;
- perf_callchain_store(entry, PERF_CONTEXT_USER);
tail = (struct frame_tail *)regs->ARM_fp - 1;
@@ -3076,7 +3075,6 @@ perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
struct stackframe fr;
- perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
fr.fp = regs->ARM_fp;
fr.sp = regs->ARM_sp;
fr.lr = regs->ARM_lr;
diff --git a/arch/powerpc/kernel/perf_callchain.c b/arch/powerpc/kernel/perf_callchain.c
index f7a85ed..d05ae42 100644
--- a/arch/powerpc/kernel/perf_callchain.c
+++ b/arch/powerpc/kernel/perf_callchain.c
@@ -57,7 +57,6 @@ perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
lr = regs->link;
sp = regs->gpr[1];
- perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
perf_callchain_store(entry, regs->nip);
if (!validate_sp(sp, current, STACK_FRAME_OVERHEAD))
@@ -234,7 +233,6 @@ static void perf_callchain_user_64(struct perf_callchain_entry *entry,
next_ip = regs->nip;
lr = regs->link;
sp = regs->gpr[1];
- perf_callchain_store(entry, PERF_CONTEXT_USER);
perf_callchain_store(entry, next_ip);
for (;;) {
@@ -435,7 +433,6 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry,
next_ip = regs->nip;
lr = regs->link;
sp = regs->gpr[1];
- perf_callchain_store(entry, PERF_CONTEXT_USER);
perf_callchain_store(entry, next_ip);
while (entry->nr < PERF_MAX_STACK_DEPTH) {
diff --git a/arch/sh/kernel/perf_callchain.c b/arch/sh/kernel/perf_callchain.c
index ef076a9..d5ca1ef 100644
--- a/arch/sh/kernel/perf_callchain.c
+++ b/arch/sh/kernel/perf_callchain.c
@@ -47,7 +47,6 @@ static const struct stacktrace_ops callchain_ops = {
void
perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
- perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
perf_callchain_store(entry, regs->pc);
unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 7f0e44e..c93bcac 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1292,7 +1292,6 @@ void perf_callchain_kernel(struct perf_callchain_entry *entry,
stack_trace_flush();
- perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
perf_callchain_store(entry, regs->tpc);
ksp = regs->u_regs[UREG_I6];
@@ -1336,7 +1335,6 @@ static void perf_callchain_user_64(struct perf_callchain_entry *entry,
{
unsigned long ufp;
- perf_callchain_store(entry, PERF_CONTEXT_USER);
perf_callchain_store(entry, regs->tpc);
ufp = regs->u_regs[UREG_I6] + STACK_BIAS;
@@ -1359,7 +1357,6 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry,
{
unsigned long ufp;
- perf_callchain_store(entry, PERF_CONTEXT_USER);
perf_callchain_store(entry, regs->tpc);
ufp = regs->u_regs[UREG_I6] & 0xffffffffUL;
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 39f8421..a3c9222 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1608,7 +1608,6 @@ static const struct stacktrace_ops backtrace_ops = {
void
perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
- perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
perf_callchain_store(entry, regs->ip);
dump_trace(NULL, regs, NULL, regs->bp, &backtrace_ops, entry);
@@ -1660,7 +1659,6 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
fp = (void __user *)regs->bp;
- perf_callchain_store(entry, PERF_CONTEXT_USER);
perf_callchain_store(entry, regs->ip);
if (perf_callchain_user32(regs, entry))
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 02efde6..615d024 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;
}
--
1.6.2.3
--
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