summaryrefslogtreecommitdiff
path: root/include/linux/rwsem.h
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2011-01-26 20:06:03 +0000
committerThomas Gleixner <tglx@linutronix.de>2011-01-27 12:30:39 +0100
commit41e5887fa39ab272d9266a09cbefdef270e28b93 (patch)
tree0f2be78896e551ded6cda768524de43a4eab900b /include/linux/rwsem.h
parent12249b34414dba7f386aadcf6be7ca36c6878300 (diff)
downloadlinux-3.10-41e5887fa39ab272d9266a09cbefdef270e28b93.tar.gz
linux-3.10-41e5887fa39ab272d9266a09cbefdef270e28b93.tar.bz2
linux-3.10-41e5887fa39ab272d9266a09cbefdef270e28b93.zip
rwsem: Unify the duplicate rwsem_is_locked() inlines
Instead of having the same implementation in each architecture, move it to linux/rwsem.h and remove the duplicates. It's unlikely that an arch will ever implement something different, but we can deal with that when it happens. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Howells <dhowells@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Matt Turner <mattst88@gmail.com> Acked-by: Tony Luck <tony.luck@intel.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Acked-by: David Miller <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> LKML-Reference: <20110126195833.876773757@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/rwsem.h')
-rw-r--r--include/linux/rwsem.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 8970c3e802e..8b9c7e9f691 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -34,6 +34,13 @@ struct rw_semaphore {
/* Include the arch specific part */
#include <asm/rwsem.h>
+
+/* In all implementations count != 0 means locked */
+static inline int rwsem_is_locked(struct rw_semaphore *sem)
+{
+ return sem->count != 0;
+}
+
#endif
/* Common initializer macros and functions */