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Subject[tip:locking/core] locking/rwsem: Move rwsem internal function declarations to rwsem-xadd.h
Commit-ID:  12a30a7fc142a123c61da9623bd824d95d36c12e
Gitweb: https://git.kernel.org/tip/12a30a7fc142a123c61da9623bd824d95d36c12e
Author: Waiman Long <longman@redhat.com>
AuthorDate: Thu, 4 Apr 2019 13:43:12 -0400
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 10 Apr 2019 10:56:00 +0200

locking/rwsem: Move rwsem internal function declarations to rwsem-xadd.h

We don't need to expose rwsem internal functions which are not supposed
to be called directly from other kernel code.

Signed-off-by: Waiman Long <longman@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Link: http://lkml.kernel.org/r/20190404174320.22416-4-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
include/linux/rwsem.h | 7 -------
kernel/locking/rwsem.h | 7 +++++++
2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 0fc41062c649..b44e533235c7 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -46,13 +46,6 @@ struct rw_semaphore {
*/
#define RWSEM_OWNER_UNKNOWN ((struct task_struct *)-2L)

-extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
-extern struct rw_semaphore *rwsem_down_read_failed_killable(struct rw_semaphore *sem);
-extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
-extern struct rw_semaphore *rwsem_down_write_failed_killable(struct rw_semaphore *sem);
-extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *);
-extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
-
/* In all implementations count != 0 means locked */
static inline int rwsem_is_locked(struct rw_semaphore *sem)
{
diff --git a/kernel/locking/rwsem.h b/kernel/locking/rwsem.h
index ee24c4f257a5..19997c82270b 100644
--- a/kernel/locking/rwsem.h
+++ b/kernel/locking/rwsem.h
@@ -153,6 +153,13 @@ static inline void rwsem_clear_reader_owned(struct rw_semaphore *sem)
}
#endif

+extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
+extern struct rw_semaphore *rwsem_down_read_failed_killable(struct rw_semaphore *sem);
+extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
+extern struct rw_semaphore *rwsem_down_write_failed_killable(struct rw_semaphore *sem);
+extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem);
+extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
+
/*
* lock for reading
*/
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