[PATCH] arch/x86/kernel/cpu/umwait.c - remove unused variable

[Valdis Klētnieks]

We get a warning when building with W=1:

  CC      arch/x86/kernel/cpu/umwait.o
arch/x86/kernel/cpu/umwait.c: In function 'umwait_init':
arch/x86/kernel/cpu/umwait.c:183:6: warning: variable 'ret' set but not used 
[-Wunused-but-set-variable]
  183 |  int ret;
      |      ^~~

And indeed, we don't do anything with it, so clean it  up.

Signed-off-by: Valdis Kletnieks <valdis.kletni...@vt.edu>

diff --git a/arch/x86/kernel/cpu/umwait.c b/arch/x86/kernel/cpu/umwait.c
index 6a204e7336c1..3d1d3952774a 100644
--- a/arch/x86/kernel/cpu/umwait.c
+++ b/arch/x86/kernel/cpu/umwait.c
@@ -180,12 +180,11 @@ static struct attribute_group umwait_attr_group = {
 static int __init umwait_init(void)
 {
        struct device *dev;
-       int ret;
 
        if (!boot_cpu_has(X86_FEATURE_WAITPKG))
                return -ENODEV;
 
-       ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "umwait:online",
+       cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "umwait:online",
                                umwait_cpu_online, NULL);
 
        register_syscore_ops(&umwait_syscore_ops);