The patch titled
Document SPIN_LOCK_UNLOCKED/RW_LOCK_UNLOCKED deprecation
has been removed from the -mm tree. Its filename was
document-spin_lock_unlocked-rw_lock_unlocked-deprecation.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: Document SPIN_LOCK_UNLOCKED/RW_LOCK_UNLOCKED deprecation
From: Michael Ellerman <michael@xxxxxxxxxxxxxx>
Apparently it's not cool anymore to use SPIN/RW_LOCK_UNLOCKED. There's
some mention of this in Documentation/spinlocks.txt, but that only talks
about dynamic initialisation.
A comment in the code mentioning the preferred usage would be good IMHO.
[akpm@xxxxxxxxxxxxxxxxxxxx: add reason for deprecation]
Signed-off-by: Michael Ellerman <michael@xxxxxxxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/spinlock_types.h | 6 ++++++
1 file changed, 6 insertions(+)
diff -puN include/linux/spinlock_types.h~document-spin_lock_unlocked-rw_lock_unlocked-deprecation include/linux/spinlock_types.h
--- a/include/linux/spinlock_types.h~document-spin_lock_unlocked-rw_lock_unlocked-deprecation
+++ a/include/linux/spinlock_types.h
@@ -85,6 +85,12 @@ typedef struct {
RW_DEP_MAP_INIT(lockname) }
#endif
+/*
+ * SPIN_LOCK_UNLOCKED and RW_LOCK_UNLOCKED defeat lockdep state tracking and
+ * are hence deprecated.
+ * Please use DEFINE_SPINLOCK()/DEFINE_RWLOCK() or
+ * __SPIN_LOCK_UNLOCKED()/__RW_LOCK_UNLOCKED() as appropriate.
+ */
#define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)
#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
_
Patches currently in -mm which might be from michael@xxxxxxxxxxxxxx are
origin.patch
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