From 970a8645ca051225a32401e4c80b50fc0a49c081 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Tue, 16 Oct 2007 23:30:09 -0700 Subject: user.c: #ifdef ->mq_bytes For those who deselect POSIX message queues. Reduces SLAB size of user_struct from 64 to 32 bytes here, SLUB size -- from 40 bytes to 32 bytes. [akpm@linux-foundation.org: fix build] Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sched.h | 2 ++ kernel/user.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index 57166582a3f..884699fa8c1 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -518,8 +518,10 @@ struct user_struct { atomic_t inotify_watches; /* How many inotify watches does this user have? */ atomic_t inotify_devs; /* How many inotify devs does this user have opened? */ #endif +#ifdef CONFIG_POSIX_MQUEUE /* protected by mq_lock */ unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */ +#endif unsigned long locked_shm; /* How many pages of mlocked shm ? */ #ifdef CONFIG_KEYS diff --git a/kernel/user.c b/kernel/user.c index f42a68e008f..9cb6f640356 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -44,7 +44,6 @@ struct user_struct root_user = { .processes = ATOMIC_INIT(1), .files = ATOMIC_INIT(0), .sigpending = ATOMIC_INIT(0), - .mq_bytes = 0, .locked_shm = 0, #ifdef CONFIG_KEYS .uid_keyring = &root_user_keyring, @@ -341,8 +340,9 @@ struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid) atomic_set(&new->inotify_watches, 0); atomic_set(&new->inotify_devs, 0); #endif - +#ifdef CONFIG_POSIX_MQUEUE new->mq_bytes = 0; +#endif new->locked_shm = 0; if (alloc_uid_keyring(new, current) < 0) { -- cgit v1.2.3