[PATCH 03/11] sched/wait,media: Replace wait_on_atomic_t usage

From: Peter Zijlstra
Date: Thu Mar 15 2018 - 08:37:45 EST


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@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
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);