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authorJiri Olsa <jolsa@redhat.com>2010-09-29 10:46:46 -0400
committerRobert Richter <robert.richter@amd.com>2010-10-01 16:07:09 +0200
commit40c6b3cb64cd1d02322df5f729cca25084580f40 (patch)
treedc34b9d321810f1a6931a453005afdfbea37f0e8 /arch/x86/oprofile
parentef70fcc0cd5d98f5e2df82c9e598b47f351d4f66 (diff)
downloadlinux-2.6.38-lt-ux500-40c6b3cb64cd1d02322df5f729cca25084580f40.tar.gz
oprofile, x86: Using struct stack_frame for 64bit processes dump
Removing unnecessary struct frame_head and replacing it with struct stack_frame. The struct stack_frame is already defined and used in other places in kernel, so there's no reason to define new structure. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'arch/x86/oprofile')
-rw-r--r--arch/x86/oprofile/backtrace.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index 3855096c59b..d640a86198b 100644
--- a/arch/x86/oprofile/backtrace.c
+++ b/arch/x86/oprofile/backtrace.c
@@ -48,35 +48,30 @@ static struct stacktrace_ops backtrace_ops = {
.walk_stack = print_context_stack,
};
-struct frame_head {
- struct frame_head *bp;
- unsigned long ret;
-} __attribute__((packed));
-
-static struct frame_head *dump_user_backtrace(struct frame_head *head)
+static struct stack_frame *dump_user_backtrace(struct stack_frame *head)
{
- struct frame_head bufhead[2];
+ struct stack_frame bufhead[2];
- /* Also check accessibility of one struct frame_head beyond */
+ /* Also check accessibility of one struct stack_frame beyond */
if (!access_ok(VERIFY_READ, head, sizeof(bufhead)))
return NULL;
if (__copy_from_user_inatomic(bufhead, head, sizeof(bufhead)))
return NULL;
- oprofile_add_trace(bufhead[0].ret);
+ oprofile_add_trace(bufhead[0].return_address);
/* frame pointers should strictly progress back up the stack
* (towards higher addresses) */
- if (head >= bufhead[0].bp)
+ if (head >= bufhead[0].next_frame)
return NULL;
- return bufhead[0].bp;
+ return bufhead[0].next_frame;
}
void
x86_backtrace(struct pt_regs * const regs, unsigned int depth)
{
- struct frame_head *head = (struct frame_head *)frame_pointer(regs);
+ struct stack_frame *head = (struct stack_frame *)frame_pointer(regs);
if (!user_mode_vm(regs)) {
unsigned long stack = kernel_stack_pointer(regs);