diff options
| author |   Oleg Nesterov <oleg@redhat.com> | 2010-06-03 21:32:39 +0200 |
|---|---|---|
| committer |   Frederic Weisbecker <fweisbec@gmail.com> | 2010-06-09 17:32:15 +0200 |
| commit | 147ec4d2361e355ab32499f739cc24845ceb89da (patch) | |
| tree | f4e686eb7aea74903ca06b93aa305ba54ad8c17e /arch/x86/kernel/stacktrace.c | |
| parent | tracing: Remove kmemtrace ftrace plugin (diff) | |
| download | linux-dev-147ec4d2361e355ab32499f739cc24845ceb89da.tar.xz linux-dev-147ec4d2361e355ab32499f739cc24845ceb89da.zip | |
x86: Make save_stack_address() !CONFIG_FRAME_POINTER friendly
If CONFIG_FRAME_POINTER=n, print_context_stack() shouldn't neglect the
non-reliable addresses on stack, this is all we have if dump_trace(bp)
is called with the wrong or zero bp.
For example, /proc/pid/stack doesn't work if CONFIG_FRAME_POINTER=n.
This patch obviously has no effect if CONFIG_FRAME_POINTER=y, otherwise
it reverts 1650743c "x86: don't save unreliable stack trace entries".
Also, remove the unnecessary type-cast.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20100603193239.GA31530@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/x86/kernel/stacktrace.c')
| -rw-r--r-- | arch/x86/kernel/stacktrace.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kernel/stacktrace.c b/arch/x86/kernel/stacktrace.c index ea54d029fe27..abc321d55870 100644 --- a/arch/x86/kernel/stacktrace.c +++ b/arch/x86/kernel/stacktrace.c @@ -26,8 +26,10 @@ static int save_stack_stack(void *data, char *name) static void save_stack_address(void *data, unsigned long addr, int reliable) { struct stack_trace *trace = data; +#ifdef CONFIG_FRAME_POINTER if (!reliable) return; +#endif if (trace->skip > 0) { trace->skip--; return; @@ -39,9 +41,11 @@ static void save_stack_address(void *data, unsigned long addr, int reliable) static void save_stack_address_nosched(void *data, unsigned long addr, int reliable) { - struct stack_trace *trace = (struct stack_trace *)data; + struct stack_trace *trace = data; +#ifdef CONFIG_FRAME_POINTER if (!reliable) return; +#endif if (in_sched_functions(addr)) return; if (trace->skip > 0) { |