From: Arnd Bergmann Date: Mon, 10 Dec 2018 21:51:57 +0000 (+0100) Subject: powerpc: eeh_event: convert semaphore to completion X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2fea82db113e4422ef5c8e6209908806e5fb6b63;p=openwrt%2Fstaging%2Fblogic.git powerpc: eeh_event: convert semaphore to completion For this use case, completions and semaphores are equivalent, but semaphores are an awkward interface that should generally be avoided, so use the completion instead. Signed-off-by: Arnd Bergmann Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/kernel/eeh_event.c b/arch/powerpc/kernel/eeh_event.c index 61c9356bf9c9..227e57f980df 100644 --- a/arch/powerpc/kernel/eeh_event.c +++ b/arch/powerpc/kernel/eeh_event.c @@ -35,7 +35,7 @@ */ static DEFINE_SPINLOCK(eeh_eventlist_lock); -static struct semaphore eeh_eventlist_sem; +static DECLARE_COMPLETION(eeh_eventlist_event); static LIST_HEAD(eeh_eventlist); /** @@ -55,7 +55,7 @@ static int eeh_event_handler(void * dummy) struct eeh_pe *pe; while (!kthread_should_stop()) { - if (down_interruptible(&eeh_eventlist_sem)) + if (wait_for_completion_interruptible(&eeh_eventlist_event)) break; /* Fetch EEH event from the queue */ @@ -102,9 +102,6 @@ int eeh_event_init(void) struct task_struct *t; int ret = 0; - /* Initialize semaphore */ - sema_init(&eeh_eventlist_sem, 0); - t = kthread_run(eeh_event_handler, NULL, "eehd"); if (IS_ERR(t)) { ret = PTR_ERR(t); @@ -142,7 +139,7 @@ int eeh_send_failure_event(struct eeh_pe *pe) spin_unlock_irqrestore(&eeh_eventlist_lock, flags); /* For EEH deamon to knick in */ - up(&eeh_eventlist_sem); + complete(&eeh_eventlist_event); return 0; }