[PATCH v2] workqueue: Use IS_ERR and PTR_ERR instead of PTR_ERR_OR_ZERO.

From: Sean Fu
Date: Wed Apr 29 2020 - 00:04:39 EST


Replace inline function PTR_ERR_OR_ZERO with IS_ERR and PTR_ERR to
remove redundant parameter definitions and checks.
Reduce code size.
Before:
text data bss dec hex filename
47510 5979 840 54329 d439 kernel/workqueue.o
After:
text data bss dec hex filename
47474 5979 840 54293 d415 kernel/workqueue.o

Signed-off-by: Sean Fu <fxinrong@xxxxxxxxx>
---
Changes in v2:
- make commit message more clear.

kernel/workqueue.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 891ccad5f271..ddf0537dce14 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4197,7 +4197,6 @@ static int wq_clamp_max_active(int max_active, unsigned int flags,
static int init_rescuer(struct workqueue_struct *wq)
{
struct worker *rescuer;
- int ret;

if (!(wq->flags & WQ_MEM_RECLAIM))
return 0;
@@ -4208,10 +4207,9 @@ static int init_rescuer(struct workqueue_struct *wq)

rescuer->rescue_wq = wq;
rescuer->task = kthread_create(rescuer_thread, rescuer, "%s", wq->name);
- ret = PTR_ERR_OR_ZERO(rescuer->task);
- if (ret) {
+ if (IS_ERR(rescuer->task)) {
kfree(rescuer);
- return ret;
+ return PTR_ERR(rescuer->task);
}

wq->rescuer = rescuer;
--
2.16.4