Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski...

[linux-2.6-block.git] / include / linux / lockdep.h

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index fb7d87e45fbe6cae331df4fb34276f6c7510374c..eabe0138eb063c22bb5618a10f23d6950ff9711f 100644 (file)
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -457,6 +457,18 @@ do {                                                               \
        lock_acquired(&(_lock)->dep_map, _RET_IP_);                     \
 } while (0)
 
+#define LOCK_CONTENDED_RETURN(_lock, try, lock)                        \
+({                                                             \
+       int ____err = 0;                                        \
+       if (!try(_lock)) {                                      \
+               lock_contended(&(_lock)->dep_map, _RET_IP_);    \
+               ____err = lock(_lock);                          \
+       }                                                       \
+       if (!____err)                                           \
+               lock_acquired(&(_lock)->dep_map, _RET_IP_);     \
+       ____err;                                                \
+})
+
 #else /* CONFIG_LOCK_STAT */
 
 #define lock_contended(lockdep_map, ip) do {} while (0)
@@ -465,6 +477,9 @@ do {                                                                \
 #define LOCK_CONTENDED(_lock, try, lock) \
        lock(_lock)
 
+#define LOCK_CONTENDED_RETURN(_lock, try, lock) \
+       lock(_lock)
+
 #endif /* CONFIG_LOCK_STAT */
 
 #ifdef CONFIG_LOCKDEP