From: Michel Lespinasse <walken@google.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
David Howells <dhowells@redhat.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Ingo Molnar <mingo@kernel.org>, Rik van Riel <riel@redhat.com>,
Davidlohr Bueso <davidlohr.bueso@hp.com>,
Peter Hurley <peter@hurleysoftware.com>
Cc: Alex Shi <alex.shi@intel.com>,
Yuanhan Liu <yuanhan.liu@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 14/14] rwsem: no need for explicit signed longs
Date: Tue, 7 May 2013 06:46:02 -0700 [thread overview]
Message-ID: <1367934362-10433-15-git-send-email-walken@google.com> (raw)
In-Reply-To: <1367934362-10433-1-git-send-email-walken@google.com>
From: Davidlohr Bueso <davidlohr.bueso@hp.com>
Change explicit "signed long" declarations into plain "long" as suggested
by Peter Hurley.
Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Reviewed-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Michel Lespinasse <walken@google.com>
---
lib/rwsem.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/lib/rwsem.c b/lib/rwsem.c
index 61f91ca75e40..cf0ad2ad19f5 100644
--- a/lib/rwsem.c
+++ b/lib/rwsem.c
@@ -64,7 +64,7 @@ __rwsem_do_wake(struct rw_semaphore *sem, enum rwsem_wake_type wake_type)
struct rwsem_waiter *waiter;
struct task_struct *tsk;
struct list_head *next;
- signed long oldcount, woken, loop, adjustment;
+ long oldcount, woken, loop, adjustment;
waiter = list_entry(sem->wait_list.next, struct rwsem_waiter, list);
if (waiter->type == RWSEM_WAITING_FOR_WRITE) {
@@ -145,10 +145,9 @@ __rwsem_do_wake(struct rw_semaphore *sem, enum rwsem_wake_type wake_type)
*/
struct rw_semaphore __sched *rwsem_down_read_failed(struct rw_semaphore *sem)
{
- signed long adjustment = -RWSEM_ACTIVE_READ_BIAS;
+ long count, adjustment = -RWSEM_ACTIVE_READ_BIAS;
struct rwsem_waiter waiter;
struct task_struct *tsk = current;
- signed long count;
/* set up my own style of waitqueue */
waiter.task = tsk;
@@ -193,10 +192,9 @@ struct rw_semaphore __sched *rwsem_down_read_failed(struct rw_semaphore *sem)
*/
struct rw_semaphore __sched *rwsem_down_write_failed(struct rw_semaphore *sem)
{
- signed long adjustment = -RWSEM_ACTIVE_WRITE_BIAS;
+ long count, adjustment = -RWSEM_ACTIVE_WRITE_BIAS;
struct rwsem_waiter waiter;
struct task_struct *tsk = current;
- signed long count;
/* set up my own style of waitqueue */
waiter.task = tsk;
--
1.8.2.1
next prev parent reply other threads:[~2013-05-07 13:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-07 13:45 [PATCH v3 00/14] rwsem fast-path write lock stealing Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 01/14] rwsem: make the waiter type an enumeration rather than a bitmask Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 02/14] rwsem: shorter spinlocked section in rwsem_down_failed_common() Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 03/14] rwsem: move rwsem_down_failed_common code into rwsem_down_{read,write}_failed Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 04/14] rwsem: simplify rwsem_down_read_failed Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 05/14] rwsem: simplify rwsem_down_write_failed Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 06/14] rwsem: more agressive lock stealing in rwsem_down_write_failed Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 07/14] rwsem: use cmpxchg for trying to steal write lock Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 08/14] rwsem: avoid taking wait_lock in rwsem_down_write_failed Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 09/14] rwsem: skip initial trylock " Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 10/14] rwsem: simplify __rwsem_do_wake Michel Lespinasse
2013-05-07 13:45 ` [PATCH v3 11/14] rwsem: implement support for write lock stealing on the fastpath Michel Lespinasse
2013-05-07 13:46 ` [PATCH v3 12/14] rwsem: do not block readers at head of queue if other readers are active Michel Lespinasse
2013-05-07 13:46 ` [PATCH v3 13/14] x86 rwsem: avoid taking slow path when stealing write lock Michel Lespinasse
2013-05-07 13:46 ` Michel Lespinasse [this message]
2013-05-07 22:39 ` [PATCH v3 15/14] rwsem: check counter to avoid cmpxchg calls Davidlohr Bueso
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