android/android_kernel_xiaomi_sm8450
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perf: Drop useless check for ignored frame

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The check that ignores the debug and nmi stack frames is useless
now that we have a frame pointer that makes us start at the
right place. We don't anymore have to deal with these.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1262235183-5320-2-git-send-regression-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker
2009-12-31 05:53:03 +01:00
committed by Ingo Molnar
parent 61405fea92
commit 0fb8ee48d9
4 changed files with 0 additions and 20 deletions
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2
arch/x86/include/asm/stacktrace.h
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@ -3,8 +3,6 @@
extern int kstack_depth_to_print;
int x86_is_stack_id(int id, char *name);
struct thread_info;
struct stacktrace_ops;

8
arch/x86/kernel/cpu/perf_event.c
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@ -2297,7 +2297,6 @@ void callchain_store(struct perf_callchain_entry *entry, u64 ip)
static DEFINE_PER_CPU(struct perf_callchain_entry, pmc_irq_entry);
static DEFINE_PER_CPU(struct perf_callchain_entry, pmc_nmi_entry);
static DEFINE_PER_CPU(int, in_ignored_frame);
static void
@ -2313,10 +2312,6 @@ static void backtrace_warning(void *data, char *msg)
static int backtrace_stack(void *data, char *name)
{
per_cpu(in_ignored_frame, smp_processor_id()) =
x86_is_stack_id(NMI_STACK, name) ||
x86_is_stack_id(DEBUG_STACK, name);
return 0;
}
@ -2324,9 +2319,6 @@ static void backtrace_address(void *data, unsigned long addr, int reliable)
{
struct perf_callchain_entry *entry = data;
if (per_cpu(in_ignored_frame, smp_processor_id()))
return;
if (reliable)
callchain_store(entry, addr);
}

5
arch/x86/kernel/dumpstack_32.c
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@ -18,11 +18,6 @@
#include "dumpstack.h"
/* Just a stub for now */
int x86_is_stack_id(int id, char *name)
{
return 0;
}
void dump_trace(struct task_struct *task, struct pt_regs *regs,
unsigned long *stack, unsigned long bp,

5
arch/x86/kernel/dumpstack_64.c
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@ -33,11 +33,6 @@ static char x86_stack_ids[][8] = {
#endif
};
int x86_is_stack_id(int id, char *name)
{
return x86_stack_ids[id - 1] == name;
}
static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
unsigned *usedp, char **idp)
{