From: Arnd Bergmann <arnd@arndb.de>
To: Russell Currey <ruscur@russell.cc>,
Sam Bobroff <sbobroff@linux.ibm.com>,
"Oliver O'Halloran" <oohall@gmail.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: Arnd Bergmann <arnd@arndb.de>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH] powerpc: eeh_event: convert semaphore to completion
Date: Mon, 10 Dec 2018 22:51:57 +0100 [thread overview]
Message-ID: <20181210215203.1936171-1-arnd@arndb.de> (raw)
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 <arnd@arndb.de>
---
arch/powerpc/kernel/eeh_event.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
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;
}
--
2.20.0
next reply other threads:[~2018-12-10 21:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 21:51 Arnd Bergmann [this message]
2018-12-10 23:18 ` [PATCH] powerpc: eeh_event: convert semaphore to completion Oliver
2018-12-10 23:33 ` Sam Bobroff
2018-12-22 9:54 ` Michael Ellerman
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