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| author | Davidlohr Bueso <davidlohr@hp.com> | 2014-05-19 17:27:57 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-06-05 10:38:45 +0200 |
| commit | dbb5eafa23fdb7a00d64b04e23a3efc59d6474cb (patch) | |
| tree | 9b6fb18c62d1cb2ea2b047ac1b87da62477f4656 /include/linux/rwsem.h | |
| parent | 4fc828e24cd9c385d3a44e1b499ec7fc70239d8a (diff) | |
| download | lwn-dbb5eafa23fdb7a00d64b04e23a3efc59d6474cb.tar.gz lwn-dbb5eafa23fdb7a00d64b04e23a3efc59d6474cb.zip | |
locking/rwsem: Fix warnings for CONFIG_RWSEM_GENERIC_SPINLOCK
Optimistic spinning is only used by the xadd variant
of rw-semaphores. Make sure that we use the old version
of the __RWSEM_INITIALIZER macro for systems that rely
on the spinlock one, otherwise warnings can be triggered,
such as the following reported on an arm box:
ipc/ipcns_notifier.c:22:8: warning: excess elements in struct initializer [enabled by default]
ipc/ipcns_notifier.c:22:8: warning: (near initialization for 'ipcns_chain.rwsem') [enabled by default]
ipc/ipcns_notifier.c:22:8: warning: excess elements in struct initializer [enabled by default]
ipc/ipcns_notifier.c:22:8: warning: (near initialization for 'ipcns_chain.rwsem') [enabled by default]
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Alex Shi <alex.shi@linaro.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Jason Low <jason.low2@hp.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <jbacik@fusionio.com>
Link: http://lkml.kernel.org/r/1400545677.6399.10.camel@buesod1.americas.hpqcorp.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/rwsem.h')
| -rw-r--r-- | include/linux/rwsem.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h index 3e108f154cb6..8d79708146aa 100644 --- a/include/linux/rwsem.h +++ b/include/linux/rwsem.h @@ -64,7 +64,7 @@ static inline int rwsem_is_locked(struct rw_semaphore *sem) # define __RWSEM_DEP_MAP_INIT(lockname) #endif -#ifdef CONFIG_SMP +#if defined(CONFIG_SMP) && !defined(CONFIG_RWSEM_GENERIC_SPINLOCK) #define __RWSEM_INITIALIZER(name) \ { RWSEM_UNLOCKED_VALUE, \ __RAW_SPIN_LOCK_UNLOCKED(name.wait_lock), \ |