kernel/user.c: clean up some leftover code
The out_unlock label is misleading; no unlocking happens after it, so just return NULL directly. Also, nothing between the kmem_cache_zalloc() that creates new and the two key_put() can initialize new->uid_keyring or new->session_keyring, so those calls are no-ops. Link: http://lkml.kernel.org/r/20190424200404.9114-1-linux@rasmusvillemoes.dk Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -185,7 +185,7 @@ struct user_struct *alloc_uid(kuid_t uid)
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if (!up) {
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new = kmem_cache_zalloc(uid_cachep, GFP_KERNEL);
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if (!new)
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goto out_unlock;
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return NULL;
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new->uid = uid;
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refcount_set(&new->__count, 1);
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@ -199,8 +199,6 @@ struct user_struct *alloc_uid(kuid_t uid)
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spin_lock_irq(&uidhash_lock);
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up = uid_hash_find(uid, hashent);
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if (up) {
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key_put(new->uid_keyring);
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key_put(new->session_keyring);
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kmem_cache_free(uid_cachep, new);
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} else {
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uid_hash_insert(new, hashent);
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@ -210,9 +208,6 @@ struct user_struct *alloc_uid(kuid_t uid)
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}
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return up;
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out_unlock:
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return NULL;
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}
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static int __init uid_cache_init(void)
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