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epoll: convert max_user_watches to long

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On a 16TB machine, max_user_watches has an integer overflow.  Convert it
to use a long and handle the associated fallout.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Robin Holt
2011-01-12 17:00:01 -08:00
committed by Linus Torvalds
parent 65329bf46b
commit 52bd19f769
2 changed files with 13 additions and 9 deletions
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include/linux/sched.h
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@@ -683,7 +683,7 @@ struct user_struct {
atomic_t fanotify_listeners;
#endif
#ifdef CONFIG_EPOLL
atomic_t epoll_watches; /* The number of file descriptors currently watched */
atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
#endif
#ifdef CONFIG_POSIX_MQUEUE
/* protected by mq_lock */