[PATCH] hw-breakpoints: fix undeclared ksym_tracer_mutex

[Frederic Weisbecker]

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 âksym_trace_filter_readâ:
kernel/trace/trace_ksym.c:226: erreur: âksym_tracer_mutexâ 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 âksym_trace_filter_writeâ:
kernel/trace/trace_ksym.c:273: erreur: âksym_tracer_mutexâ undeclared (first use in this function)
kernel/trace/trace_ksym.c: In function âksym_trace_resetâ:
kernel/trace/trace_ksym.c:335: erreur: âksym_tracer_mutexâ 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@xxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
 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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