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oprofile, x86: Using struct stack_frame for 64bit processes dump

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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>
This commit is contained in:
Jiri Olsa 2010-09-29 10:46:46 -04:00 committed by Robert Richter
parent ef70fcc0cd
commit 40c6b3cb64
1 changed files with 7 additions and 12 deletions
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19
arch/x86/oprofile/backtrace.c
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@ -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);