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authorMichal Nazarewicz <m.nazarewicz@samsung.com>2010-05-05 14:53:12 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-21 00:21:42 +0400
commit8120a8aadb2059e29982561658bc6675126f8105 (patch)
tree1e05b58df0397b76c7ad1543d2af21e746e44369
parent22c43c81a51e05f61e90445ceb59d486c12fd921 (diff)
downloadlinux-8120a8aadb2059e29982561658bc6675126f8105.tar.xz
fs/timerfd.c: make use of wait_event_interruptible_locked_irq()
This patch modifies the fs/timerfd.c to use the newly created wait_event_interruptible_locked_irq() macro. This replaces an open code implementation with a single macro call. Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Roland Dreier <rolandd@cisco.com> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Davide Libenzi <davidel@xmailserver.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--fs/timerfd.c25
1 files changed, 4 insertions, 21 deletions
diff --git a/fs/timerfd.c b/fs/timerfd.c
index 98158de91d24..b86ab8eff79a 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
@@ -110,31 +110,14 @@ static ssize_t timerfd_read(struct file *file, char __user *buf, size_t count,
struct timerfd_ctx *ctx = file->private_data;
ssize_t res;
u64 ticks = 0;
- DECLARE_WAITQUEUE(wait, current);
if (count < sizeof(ticks))
return -EINVAL;
spin_lock_irq(&ctx->wqh.lock);
- res = -EAGAIN;
- if (!ctx->ticks && !(file->f_flags & O_NONBLOCK)) {
- __add_wait_queue(&ctx->wqh, &wait);
- for (res = 0;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (ctx->ticks) {
- res = 0;
- break;
- }
- if (signal_pending(current)) {
- res = -ERESTARTSYS;
- break;
- }
- spin_unlock_irq(&ctx->wqh.lock);
- schedule();
- spin_lock_irq(&ctx->wqh.lock);
- }
- __remove_wait_queue(&ctx->wqh, &wait);
- __set_current_state(TASK_RUNNING);
- }
+ if (file->f_flags & O_NONBLOCK)
+ res = -EAGAIN;
+ else
+ res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks);
if (ctx->ticks) {
ticks = ctx->ticks;
if (ctx->expired && ctx->tintv.tv64) {