Cleanup of unnecessary do while 0 in api mappings

With the migration pushdonw a few of the do{ }while(0)
loops became obsolete but got left over - this patch 
only removes this fallout.

Patch applies on top of 3.12.9-rt13

Signed-off-by: Nicholas Mc Guire <der.h...@hofr.at>
---
 include/linux/rwlock_rt.h |   20 ++++----------------
 1 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/include/linux/rwlock_rt.h b/include/linux/rwlock_rt.h
index e85a5df..4c729ce 100644
--- a/include/linux/rwlock_rt.h
+++ b/include/linux/rwlock_rt.h
@@ -42,10 +42,7 @@ extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, 
struct lock_class_key
                flags = rt_write_lock_irqsave(lock);    \
        } while (0)
 
-#define read_lock(lock)                                        \
-       do {                                            \
-               rt_read_lock(lock);                     \
-       } while (0)
+#define read_lock(lock)                rt_read_lock(lock)
 
 #define read_lock_bh(lock)                             \
        do {                                            \
@@ -55,10 +52,7 @@ extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, 
struct lock_class_key
 
 #define read_lock_irq(lock)    read_lock(lock)
 
-#define write_lock(lock)                               \
-       do {                                            \
-               rt_write_lock(lock);                    \
-       } while (0)
+#define write_lock(lock)       rt_write_lock(lock)
 
 #define write_lock_bh(lock)                            \
        do {                                            \
@@ -68,10 +62,7 @@ extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, 
struct lock_class_key
 
 #define write_lock_irq(lock)   write_lock(lock)
 
-#define read_unlock(lock)                              \
-       do {                                            \
-               rt_read_unlock(lock);                   \
-       } while (0)
+#define read_unlock(lock)      rt_read_unlock(lock)
 
 #define read_unlock_bh(lock)                           \
        do {                                            \
@@ -81,10 +72,7 @@ extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, 
struct lock_class_key
 
 #define read_unlock_irq(lock)  read_unlock(lock)
 
-#define write_unlock(lock)                             \
-       do {                                            \
-               rt_write_unlock(lock);                  \
-       } while (0)
+#define write_unlock(lock)     rt_write_unlock(lock)
 
 #define write_unlock_bh(lock)                          \
        do {                                            \
-- 
1.7.2.5

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