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authorTejun Heo <tj@kernel.org>2010-02-16 20:50:50 -0500
committerFrederic Weisbecker <fweisbec@gmail.com>2010-02-27 10:23:39 -0500
commit44ee63587dce85593c22497140db16f4e5027860 (patch)
tree0b3d45f9755080f1c7362a8a2eb69e326b0e2f85 /include/linux/hw_breakpoint.h
parent018cbffe6819f6f8db20a0a3acd9bab9bfd667e4 (diff)
percpu: Add __percpu sparse annotations to hw_breakpoint
Add __percpu sparse annotations to hw_breakpoint. These annotations are to make sparse consider percpu variables to be in a different address space and warn if accessed without going through percpu accessors. This patch doesn't affect normal builds. In kernel/hw_breakpoint.c, per_cpu(nr_task_bp_pinned, cpu)'s will trigger spurious noderef related warnings from sparse. Changing it to &per_cpu(nr_task_bp_pinned[0], cpu) will work around the problem but deemed to ugly by the maintainer. Leave it alone until better solution can be found. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: K.Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <4B7B4B7A.9050902@kernel.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'include/linux/hw_breakpoint.h')
-rw-r--r--include/linux/hw_breakpoint.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h
index 5977b724f7c..c70d27af03f 100644
--- a/include/linux/hw_breakpoint.h
+++ b/include/linux/hw_breakpoint.h
@@ -66,14 +66,14 @@ register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
66 perf_overflow_handler_t triggered, 66 perf_overflow_handler_t triggered,
67 int cpu); 67 int cpu);
68 68
69extern struct perf_event ** 69extern struct perf_event * __percpu *
70register_wide_hw_breakpoint(struct perf_event_attr *attr, 70register_wide_hw_breakpoint(struct perf_event_attr *attr,
71 perf_overflow_handler_t triggered); 71 perf_overflow_handler_t triggered);
72 72
73extern int register_perf_hw_breakpoint(struct perf_event *bp); 73extern int register_perf_hw_breakpoint(struct perf_event *bp);
74extern int __register_perf_hw_breakpoint(struct perf_event *bp); 74extern int __register_perf_hw_breakpoint(struct perf_event *bp);
75extern void unregister_hw_breakpoint(struct perf_event *bp); 75extern void unregister_hw_breakpoint(struct perf_event *bp);
76extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events); 76extern void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events);
77 77
78extern int dbg_reserve_bp_slot(struct perf_event *bp); 78extern int dbg_reserve_bp_slot(struct perf_event *bp);
79extern int dbg_release_bp_slot(struct perf_event *bp); 79extern int dbg_release_bp_slot(struct perf_event *bp);
@@ -100,7 +100,7 @@ static inline struct perf_event *
100register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, 100register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
101 perf_overflow_handler_t triggered, 101 perf_overflow_handler_t triggered,
102 int cpu) { return NULL; } 102 int cpu) { return NULL; }
103static inline struct perf_event ** 103static inline struct perf_event * __percpu *
104register_wide_hw_breakpoint(struct perf_event_attr *attr, 104register_wide_hw_breakpoint(struct perf_event_attr *attr,
105 perf_overflow_handler_t triggered) { return NULL; } 105 perf_overflow_handler_t triggered) { return NULL; }
106static inline int 106static inline int
@@ -109,7 +109,7 @@ static inline int
109__register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } 109__register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
110static inline void unregister_hw_breakpoint(struct perf_event *bp) { } 110static inline void unregister_hw_breakpoint(struct perf_event *bp) { }
111static inline void 111static inline void
112unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { } 112unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events) { }
113static inline int 113static inline int
114reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } 114reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; }
115static inline void release_bp_slot(struct perf_event *bp) { } 115static inline void release_bp_slot(struct perf_event *bp) { }