linux-kernel - [PATCH] hw-breakpoints: fix undeclared ksym_tracer

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Date:	Wed,  3 Jun 2009 01:54:29 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>
Subject: [PATCH] hw-breakpoints: fix undeclared ksym_tracer_mutex

Ingo,

Here is a patch for a build error on hardware breakpoints.

Thanks.

Frederic Weisbecker (1):
  hw-breakpoints: fix undeclared ksym_tracer_mutex

 kernel/trace/trace_ksym.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

The following changes since commit 62edab9056a6cf0c9207339c8892c923a5217e45:
  K.Prasad (1):
        hw-breakpoints: reset bits in dr6 after the corresponding exception is handled

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git hw-breakpoints-2

Frederic Weisbecker (1):
      hw-breakpoints: fix undeclared ksym_tracer_mutex

 kernel/trace/trace_ksym.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
>From 73874005cd8800440be4299bd095387fff4b90ac Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@...il.com>
Date: Wed, 3 Jun 2009 01:43:38 +0200
Subject: [PATCH] hw-breakpoints: fix undeclared ksym_tracer_mutex
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

ksym_tracer_mutex is declared inside an #ifdef CONFIG_PROFILE_KSYM_TRACER
section. This makes it unavailable for the hardware breakpoint tracer if it is
configured without the breakpoint profiler.

This patch fixes the following build error:

kernel/trace/trace_ksym.c: In function ‘ksym_trace_filter_read’:
kernel/trace/trace_ksym.c:226: erreur: ‘ksym_tracer_mutex’ undeclared (first use in this function)
kernel/trace/trace_ksym.c:226: erreur: (Each undeclared identifier is reported only once
kernel/trace/trace_ksym.c:226: erreur: for each function it appears in.)
kernel/trace/trace_ksym.c: In function ‘ksym_trace_filter_write’:
kernel/trace/trace_ksym.c:273: erreur: ‘ksym_tracer_mutex’ undeclared (first use in this function)
kernel/trace/trace_ksym.c: In function ‘ksym_trace_reset’:
kernel/trace/trace_ksym.c:335: erreur: ‘ksym_tracer_mutex’ undeclared (first use in this function)
make[1]: *** [kernel/trace/trace_ksym.o] Erreur 1

[ Impact: fix a build error ]

Reported-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 kernel/trace/trace_ksym.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_ksym.c b/kernel/trace/trace_ksym.c
index 11c74f6..eef97e7 100644
--- a/kernel/trace/trace_ksym.c
+++ b/kernel/trace/trace_ksym.c
@@ -44,12 +44,12 @@ static unsigned int ksym_tracing_enabled;
 
 static HLIST_HEAD(ksym_filter_head);
 
+static DEFINE_MUTEX(ksym_tracer_mutex);
+
 #ifdef CONFIG_PROFILE_KSYM_TRACER
 
 #define MAX_UL_INT 0xffffffff
 
-static DEFINE_MUTEX(ksym_tracer_mutex);
-
 void ksym_collect_stats(unsigned long hbp_hit_addr)
 {
 	struct hlist_node *node;
-- 
1.6.2.3

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