perf: Use hot regs with software sched switch/migrate events
[linux-2.6.git] / include / linux / perf_event.h
index 9547703..c8e3754 100644 (file)
@@ -842,13 +842,6 @@ extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
 
 extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
 
-static inline void
-perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
-{
-       if (atomic_read(&perf_swevent_enabled[event_id]))
-               __perf_sw_event(event_id, nr, nmi, regs, addr);
-}
-
 extern void
 perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
 
@@ -887,6 +880,20 @@ static inline void perf_fetch_caller_regs(struct pt_regs *regs, int skip)
        return perf_arch_fetch_caller_regs(regs, ip, skip);
 }
 
+static inline void
+perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
+{
+       if (atomic_read(&perf_swevent_enabled[event_id])) {
+               struct pt_regs hot_regs;
+
+               if (!regs) {
+                       perf_fetch_caller_regs(&hot_regs, 1);
+                       regs = &hot_regs;
+               }
+               __perf_sw_event(event_id, nr, nmi, regs, addr);
+       }
+}
+
 extern void __perf_event_mmap(struct vm_area_struct *vma);
 
 static inline void perf_event_mmap(struct vm_area_struct *vma)