Commit f0baa040 authored Mar 15, 2018 by Peter Zijlstra Committed by Ingo Molnar Mar 20, 2018

sched/wait, drivers/media: Convert wait_on_atomic_t() usage to the new wait_var_event() API



The old wait_on_atomic_t() is going to get removed, use the more
flexible wait_var_event() API instead.

Unlike wake_up_atomic_t(), wake_up_var() will issue the wakeup
even if the variable is not 0.

No change in functionality.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent d224985a

drivers/media/platform/qcom/venus/hfi.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -106,8 +106,8 @@ int hfi_core_deinit(struct venus_core *core, bool blocking)

		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_inst *inst)

		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);