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>

diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index 3855096..d640a86 100644 (file)
--- 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);