+ fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix.patch added to -mm tree

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The patch titled
     Subject: fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix
has been added to the -mm tree.  Its filename is
     fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix.patch

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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix

fix build, fix printk typo

Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Anton Blanchard <anton@xxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 kernel/user.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/kernel/user.c~fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix
+++ a/kernel/user.c
@@ -138,7 +138,9 @@ static void free_user(struct user_struct
 {
 	uid_hash_remove(up);
 	spin_unlock_irqrestore(&uidhash_lock, flags);
+#ifdef CONFIG_EPOLL
 	percpu_counter_destroy(&up->epoll_watches);
+#endif
 	kmem_cache_free(uid_cachep, up);
 }
 
@@ -186,10 +188,12 @@ struct user_struct *alloc_uid(kuid_t uid
 
 		new->uid = uid;
 		refcount_set(&new->__count, 1);
+#ifdef CONFIG_EPOLL
 		if (percpu_counter_init(&new->epoll_watches, 0, GFP_KERNEL)) {
 			kmem_cache_free(uid_cachep, new);
 			return NULL;
 		}
+#endif
 		ratelimit_state_init(&new->ratelimit, HZ, 100);
 		ratelimit_set_flags(&new->ratelimit, RATELIMIT_MSG_ON_RELEASE);
 
@@ -200,7 +204,9 @@ struct user_struct *alloc_uid(kuid_t uid
 		spin_lock_irq(&uidhash_lock);
 		up = uid_hash_find(uid, hashent);
 		if (up) {
+#ifdef CONFIG_EPOLL
 			percpu_counter_destroy(&new->epoll_watches);
+#endif
 			kmem_cache_free(uid_cachep, new);
 		} else {
 			uid_hash_insert(new, hashent);
@@ -222,8 +228,10 @@ static int __init uid_cache_init(void)
 	for(n = 0; n < UIDHASH_SZ; ++n)
 		INIT_HLIST_HEAD(uidhash_table + n);
 
+#ifdef CONFIG_EPOLL
 	if (percpu_counter_init(&root_user.epoll_watches, 0, GFP_KERNEL))
-		panic("percpu cpunter alloc failed");
+		panic("percpu counter alloc failed");
+#endif
 
 	/* Insert the root user immediately (init already runs as root) */
 	spin_lock_irq(&uidhash_lock);
_

Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are

mm.patch
lazy-tlb-allow-lazy-tlb-mm-refcounting-to-be-configurable-fix.patch
mm-compaction-optimize-proactive-compaction-deferrals-fix.patch
mm-compaction-support-triggering-of-proactive-compaction-by-user-fix.patch
mm-mempolicy-convert-from-atomic_t-to-refcount_t-on-mempolicy-refcnt-fix.patch
fs-epoll-use-a-per-cpu-counter-for-users-watches-count-fix.patch
log-if-a-core-dump-is-aborted-due-to-changed-file-permissions-fix.patch
linux-next-rejects.patch
kernel-forkc-export-kernel_thread-to-modules.patch




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