linux-kernel - [PATCH 2/4] uprobes/tracing: Kill the pointless seq_print_ip

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Date:	Fri, 29 Mar 2013 19:15:43 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Steven Rostedt <rostedt@...dmis.org>
Cc:	Anton Arapov <anton@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] uprobes/tracing: Kill the pointless seq_print_ip_sym()
	call

seq_print_ip_sym(ip) in print_uprobe_event() is pointless,
kallsyms_lookup(ip) can not resolve a user-space address.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
 kernel/trace/trace_uprobe.c |    8 +-------
 1 files changed, 1 insertions(+), 7 deletions(-)

diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index af5b773..8e00901 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -531,13 +531,7 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e
 	field = (struct uprobe_trace_entry_head *)iter->ent;
 	tu = container_of(event, struct trace_uprobe, call.event);
 
-	if (!trace_seq_printf(s, "%s: (", tu->call.name))
-		goto partial;
-
-	if (!seq_print_ip_sym(s, field->ip, flags | TRACE_ITER_SYM_OFFSET))
-		goto partial;
-
-	if (!trace_seq_puts(s, ")"))
+	if (!trace_seq_printf(s, "%s: (0x%lx)", tu->call.name, field->ip))
 		goto partial;
 
 	data = (u8 *)&field[1];
-- 
1.5.5.1

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