perf,x86: fix link failure for non-Intel configs
authorDavid Rientjes <rientjes@google.com>
Sun, 17 Mar 2013 22:49:10 +0000 (15:49 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sun, 17 Mar 2013 22:59:15 +0000 (15:59 -0700)
Commit 1d9d8639c063 ("perf,x86: fix kernel crash with PEBS/BTS after
suspend/resume") introduces a link failure since
perf_restore_debug_store() is only defined for CONFIG_CPU_SUP_INTEL:

arch/x86/power/built-in.o: In function `restore_processor_state':
(.text+0x45c): undefined reference to `perf_restore_debug_store'

Fix it by defining the dummy function appropriately.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/perf_event.h

index 71caed8626be9950c003cbd50590c1ca68421326..1d795df6f4cfdb53575efe2fd756015c0ad363de 100644 (file)
@@ -758,7 +758,6 @@ extern void perf_event_enable(struct perf_event *event);
 extern void perf_event_disable(struct perf_event *event);
 extern int __perf_event_disable(void *info);
 extern void perf_event_task_tick(void);
-extern void perf_restore_debug_store(void);
 #else
 static inline void
 perf_event_task_sched_in(struct task_struct *prev,
@@ -798,6 +797,11 @@ static inline void perf_event_enable(struct perf_event *event)             { }
 static inline void perf_event_disable(struct perf_event *event)                { }
 static inline int __perf_event_disable(void *info)                     { return -1; }
 static inline void perf_event_task_tick(void)                          { }
+#endif
+
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
+extern void perf_restore_debug_store(void);
+#else
 static inline void perf_restore_debug_store(void)                      { }
 #endif