Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1401833

[RFC][PATCH 7/7] locking,asm-generic: Remove generic rwsem add and rwsem update definitions

Show all headers | View raw

The rwsem count has been converted to an atomic variable and we
now directly use atomic_long_add() and atomic_long_add_return()
on the count, so we can remove the asm-generic implementation of
rwsem_atomic_add() and rwsem_atomic_update().

Signed-off-by: Jason Low <jason.low2@hpe.com>
---
 include/asm-generic/rwsem.h | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/include/asm-generic/rwsem.h b/include/asm-generic/rwsem.h
index 3fc94a0..dd9db88 100644
--- a/include/asm-generic/rwsem.h
+++ b/include/asm-generic/rwsem.h
@@ -107,14 +107,6 @@ static inline void __up_write(struct rw_semaphore *sem)
 }
 
 /*
- * implement atomic add functionality
- */
-static inline void rwsem_atomic_add(long delta, struct rw_semaphore *sem)
-{
-	atomic_long_add(delta, (atomic_long_t *)&sem->count);
-}
-
-/*
  * downgrade write lock to read lock
  */
 static inline void __downgrade_write(struct rw_semaphore *sem)
@@ -134,13 +126,5 @@ static inline void __downgrade_write(struct rw_semaphore *sem)
 		rwsem_downgrade_wake(sem);
 }
 
-/*
- * implement exchange and add functionality
- */
-static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem)
-{
-	return atomic_long_add_return(delta, (atomic_long_t *)&sem->count);
-}
-
 #endif	/* __KERNEL__ */
 #endif	/* _ASM_GENERIC_RWSEM_H */
-- 
2.1.4

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
  [RFC][PATCH 6/7] locking,s390: Remove s390 rwsem add and rwsem update Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
  [RFC][PATCH 7/7] locking,asm-generic: Remove generic rwsem add and rwsem update definitions Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
  [RFC][PATCH 5/7] locking,ia64: Remove ia64 rwsem add and rwsem update Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
  [RFC][PATCH 1/7] locking/rwsem: Optimize write lock by reducing operations in slowpath Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
  [RFC][PATCH 3/7] locking,x86: Remove x86 rwsem add and rwsem update Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
  [RFC][PATCH 2/7] locking/rwsem: Convert sem->count to atomic_long_t Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
  Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t Linus Torvalds <torvalds@linux-foundation.org> - 2016-05-17 03:20 +0200
    Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to  atomic_long_t Peter Zijlstra <peterz@infradead.org> - 2016-05-17 13:20 +0200
      Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to  atomic_long_t Jason Low <jason.low2@hpe.com> - 2016-05-17 19:10 +0200
      Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to  atomic_long_t Davidlohr Bueso <dave@stgolabs.net> - 2016-05-20 08:30 +0200

csiph-web