watch-queue: remove spurious double semicolon

stable inclusion
from stable-v5.10.134
commit bb1990a3005e3655e84f9a57b3f30ce96d597dee
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5X57Q
CVE: CVE-2022-1882

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bb1990a3005e3655e84f9a57b3f30ce96d597dee

--------------------------------

commit 44e29e64 upstream.

Sedat Dilek noticed that I had an extraneous semicolon at the end of a
line in the previous patch.

It's harmless, but unintentional, and while compilers just treat it as
an extra empty statement, for all I know some other tooling might warn
about it. So clean it up before other people notice too ;)

Fixes: 353f7988 ("watchqueue: make sure to serialize 'wqueue->defunct' properly")
Reported-by: NSedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Reported-by: NSedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYu Kuai <yukuai3@huawei.com>
Reviewed-by: NZhang Yi <yi.zhang@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

kernel/watch_queue.c

@@ -227,7 +227,7 @@ void __post_watch_notification(struct watch_list *wlist,
 
 		if (lock_wqueue(wqueue)) {
 			post_one_notification(wqueue, n);
-			unlock_wqueue(wqueue);;
+			unlock_wqueue(wqueue);
 		}
 	}