From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>, linux-kernel@vger.kernel.org
Cc: Dan Williams <dan.j.williams@intel.com>,
David Howells <dhowells@redhat.com>,
Daniel Vetter <daniel.vetter@intel.com>,
David Airlie <airlied@linux.ie>,
Stanimir Varbanov <stanimir.varbanov@linaro.org>,
Chris Mason <clm@fb.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
Joel Becker <jlbec@evilplan.org>, James Hogan <jhogan@kernel.org>,
Ralf Baechle <ralf@linux-mips.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
George Spelvin <linux@sciencehorizons.net>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>
Subject: [PATCH 03/11] sched/wait,media: Replace wait_on_atomic_t usage
Date: Thu, 15 Mar 2018 13:19:05 +0100 [thread overview]
Message-ID: <20180315123202.472689123@infradead.org> (raw)
In-Reply-To: 20180315121902.942902000@infradead.org
[-- Attachment #1: peterz-wait_var-3.patch --]
[-- Type: text/plain, Size: 1148 bytes --]
Convert the wait_on_atomic_t() usage to the new wait_var_event() API.
Unlike the wake_up_atomic_t(), wake_up_var() will issue the wakeup
even if the variable is not 0.
Cc: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
drivers/media/platform/qcom/venus/hfi.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/media/platform/qcom/venus/hfi.c
+++ b/drivers/media/platform/qcom/venus/hfi.c
@@ -106,8 +106,8 @@ int hfi_core_deinit(struct venus_core *c
if (!empty) {
mutex_unlock(&core->lock);
- wait_on_atomic_t(&core->insts_count, atomic_t_wait,
- TASK_UNINTERRUPTIBLE);
+ wait_var_event(&core->insts_count,
+ !atomic_read(&core->insts_count));
mutex_lock(&core->lock);
}
@@ -229,8 +229,8 @@ void hfi_session_destroy(struct venus_in
mutex_lock(&core->lock);
list_del_init(&inst->list);
- atomic_dec(&core->insts_count);
- wake_up_atomic_t(&core->insts_count);
+ if (atomic_dec_and_test(&core->insts_count))
+ wake_up_var(&core->insts_count);
mutex_unlock(&core->lock);
}
EXPORT_SYMBOL_GPL(hfi_session_destroy);
next prev parent reply other threads:[~2018-03-15 12:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-15 12:19 [PATCH 00/11] sched/wait: Replace wait_on_atomic_t() with wait_var_event() Peter Zijlstra
2018-03-15 12:19 ` [PATCH 01/11] sched/wait: Introduce wait_var_event() Peter Zijlstra
2018-03-19 16:45 ` Dan Williams
2018-03-15 12:19 ` [PATCH 02/11] sched/wait,drm: Replace wait_on_atomic_t usage Peter Zijlstra
2018-03-15 12:50 ` Chris Wilson
2018-03-15 12:19 ` Peter Zijlstra [this message]
2018-03-15 12:19 ` [PATCH 04/11] sched/wait,afs: " Peter Zijlstra
2018-03-15 12:19 ` [PATCH 05/11] sched/wait,btrfs: " Peter Zijlstra
2018-03-15 20:17 ` David Sterba
2018-03-15 12:19 ` [PATCH 06/11] sched/wait,fscache: " Peter Zijlstra
2018-03-15 12:19 ` [PATCH 07/11] sched/wait,nfs: " Peter Zijlstra
2018-03-15 12:19 ` [PATCH 08/11] sched/wait,ocfs2: " Peter Zijlstra
2018-03-15 12:19 ` [PATCH 09/11] sched/wait,mips: Fix and replace " Peter Zijlstra
2018-03-15 12:19 ` [PATCH 10/11] sched/wait: Remove wait_on_atomic_t() Peter Zijlstra
2018-03-15 12:19 ` [PATCH 11/11] sched/wait: Improve __var_waitqueue() Peter Zijlstra
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