From 99329c44f28a1b7ac83beebfb4319e612042e319 Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Wed, 7 Oct 2009 18:27:48 -0400
Subject: 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>
---
 kernel/trace/trace_kprobe.c | 11 -----------
 1 file changed, 11 deletions(-)

(limited to 'kernel/trace')

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index f63ead0cc5c..ba6d3bd4888 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)
-- 
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