tracing/kprobes: Remove '$ra' special variable

Remove '$ra' (return address) because it is already shown at the head of
each entry.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Frank Ch. Eigler <fche@redhat.com>
LKML-Reference: <20091007222748.1684.12711.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

1 files changed, 0 insertions, 11 deletions

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index f63ead0cc5cf..ba6d3bd48889 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -85,11 +85,6 @@ static __kprobes unsigned long fetch_retvalue(struct pt_regs *regs,
         return regs_return_value(regs);
 }
 
-static __kprobes unsigned long fetch_ip(struct pt_regs *regs, void *dummy)
-{
-        return instruction_pointer(regs);
-}
-
 static __kprobes unsigned long fetch_stack_address(struct pt_regs *regs,
                                                    void *dummy)
 {
@@ -234,8 +229,6 @@ static int probe_arg_string(char *buf, size_t n, struct fetch_func *ff)
                 ret = snprintf(buf, n, "@%s%+ld", sc->symbol, sc->offset);
         } else if (ff->func == fetch_retvalue)
                 ret = snprintf(buf, n, "$rv");
-        else if (ff->func == fetch_ip)
-                ret = snprintf(buf, n, "$ra");
         else if (ff->func == fetch_stack_address)
                 ret = snprintf(buf, n, "$sa");
         else if (ff->func == fetch_indirect) {
@@ -448,9 +441,6 @@ static int parse_probe_vars(char *arg, struct fetch_func *ff, int is_return)
                 if (is_return && arg[1] == 'v') {
                         ff->func = fetch_retvalue;
                         ff->data = NULL;
-                } else if (is_return && arg[1] == 'a') {
-                        ff->func = fetch_ip;
-                        ff->data = NULL;
                 } else
                         ret = -EINVAL;
                 break;
@@ -560,7 +550,6 @@ static int create_trace_probe(int argc, char **argv)
          * Fetch args:
          *  $aN : fetch Nth of function argument. (N:0-)
          *  $rv : fetch return value
-         *  $ra : fetch return address
          *  $sa : fetch stack address
          *  $sN : fetch Nth of stack (N:0-)
          *  @ADDR       : fetch memory at ADDR (ADDR should be in kernel)