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authorByungchul Park <byungchul.park@lge.com>2017-10-25 17:56:03 +0900
committerIngo Molnar <mingo@kernel.org>2017-10-25 12:19:03 +0200
commita7967bc31584bd282682981295861e7bcba19e65 (patch)
tree3d774e0f1ddd13a85407e6e7dee0dcd10aa70c3e /include/linux/completion.h
parente121d64e16484d4a5eba94cd2fa9eb3848b7c9c2 (diff)
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sched/completions: Add support for initializing completions with lockdep_map
Sometimes we want to initialize completions with sparate lockdep maps to assign lock classes as desired. For example, the workqueue code needs to directly manage lockdep maps, since only the code is aware of how to classify lockdep maps properly. Provide additional macros initializing completions in that way. Signed-off-by: Byungchul Park <byungchul.park@lge.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: amir73il@gmail.com Cc: axboe@kernel.dk Cc: darrick.wong@oracle.com Cc: david@fromorbit.com Cc: hch@infradead.org Cc: idryomov@gmail.com Cc: johan@kernel.org Cc: johannes.berg@intel.com Cc: kernel-team@lge.com Cc: linux-block@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: linux-mm@kvack.org Cc: linux-xfs@vger.kernel.org Cc: oleg@redhat.com Cc: tj@kernel.org Link: http://lkml.kernel.org/r/1508921765-15396-8-git-send-email-byungchul.park@lge.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/completion.h')
-rw-r--r--include/linux/completion.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/completion.h b/include/linux/completion.h
index 91218036b1c8..4da49916ef3f 100644
--- a/include/linux/completion.h
+++ b/include/linux/completion.h
@@ -49,6 +49,13 @@ static inline void complete_release_commit(struct completion *x)
lock_commit_crosslock((struct lockdep_map *)&x->map);
}
+#define init_completion_map(x, m) \
+do { \
+ lockdep_init_map_crosslock((struct lockdep_map *)&(x)->map, \
+ (m)->name, (m)->key, 0); \
+ __init_completion(x); \
+} while (0)
+
#define init_completion(x) \
do { \
static struct lock_class_key __key; \
@@ -58,6 +65,7 @@ do { \
__init_completion(x); \
} while (0)
#else
+#define init_completion_map(x, m) __init_completion(x)
#define init_completion(x) __init_completion(x)
static inline void complete_acquire(struct completion *x) {}
static inline void complete_release(struct completion *x) {}
@@ -73,6 +81,9 @@ static inline void complete_release_commit(struct completion *x) {}
{ 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
#endif
+#define COMPLETION_INITIALIZER_ONSTACK_MAP(work, map) \
+ (*({ init_completion_map(&(work), &(map)); &(work); }))
+
#define COMPLETION_INITIALIZER_ONSTACK(work) \
(*({ init_completion(&work); &work; }))
@@ -102,8 +113,11 @@ static inline void complete_release_commit(struct completion *x) {}
#ifdef CONFIG_LOCKDEP
# define DECLARE_COMPLETION_ONSTACK(work) \
struct completion work = COMPLETION_INITIALIZER_ONSTACK(work)
+# define DECLARE_COMPLETION_ONSTACK_MAP(work, map) \
+ struct completion work = COMPLETION_INITIALIZER_ONSTACK_MAP(work, map)
#else
# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
+# define DECLARE_COMPLETION_ONSTACK_MAP(work, map) DECLARE_COMPLETION(work)
#endif
/**