[PATCH] kthread: Fix build warning variable 'ret' set but not used

[Dhruva Gole]

Fix the following build time warning in kthread:

   kernel/kthread.c: In function 'kthread_affine_preferred':
>> kernel/kthread.c:861:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
     861 |         int ret;
         |             ^~~

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202501301528.t0cZVbnq-lkp@xxxxxxxxx/
Signed-off-by: Dhruva Gole <d-gole@xxxxxx>
---
 kernel/kthread.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 4005b13ebd7f..f730b1413d13 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -859,7 +859,6 @@ int kthread_affine_preferred(struct task_struct *p, const struct cpumask *mask)
 	struct kthread *kthread = to_kthread(p);
 	cpumask_var_t affinity;
 	unsigned long flags;
-	int ret;
 
 	if (!wait_task_inactive(p, TASK_UNINTERRUPTIBLE) || kthread->started) {
 		WARN_ON(1);
@@ -873,7 +872,6 @@ int kthread_affine_preferred(struct task_struct *p, const struct cpumask *mask)
 
 	kthread->preferred_affinity = kzalloc(sizeof(struct cpumask), GFP_KERNEL);
 	if (!kthread->preferred_affinity) {
-		ret = -ENOMEM;
 		goto out;
 	}
 
-- 
2.34.1