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sched: fix !SYSFS build breakage

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When CONFIG_SYSFS is not set, CONFIG_FAIR_USER_SCHED fails to build
with

kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1488): undefined reference to `kernel_subsys'
kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1490): undefined reference to `kernel_subsys'
kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1480): undefined reference to `kernel_subsys'
kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1494): undefined reference to `kernel_subsys'

This patch fixes this build error.

Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Dhaval Giani 2007-10-17 16:55:11 +02:00 • committed by Ingo Molnar
parent 908a7c1b9b
commit b1a8c172c3
2 changed files with 17 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/linux/sched.h
View file

@ -530,10 +530,12 @@ struct user_struct {
#ifdef CONFIG_FAIR_USER_SCHED #ifdef CONFIG_FAIR_USER_SCHED
struct task_group *tg; struct task_group *tg;
#ifdef CONFIG_SYSFS
struct kset kset; struct kset kset;
struct subsys_attribute user_attr; struct subsys_attribute user_attr;
struct work_struct work; struct work_struct work;
#endif #endif
#endif
}; };
#ifdef CONFIG_FAIR_USER_SCHED #ifdef CONFIG_FAIR_USER_SCHED

23
kernel/user.c
View file

@ -87,9 +87,6 @@ static inline struct user_struct *uid_hash_find(uid_t uid,
#ifdef CONFIG_FAIR_USER_SCHED #ifdef CONFIG_FAIR_USER_SCHED
static struct kobject uids_kobject; /* represents /sys/kernel/uids directory */
static DEFINE_MUTEX(uids_mutex);
static void sched_destroy_user(struct user_struct *up) static void sched_destroy_user(struct user_struct *up)
{ {
sched_destroy_group(up->tg); sched_destroy_group(up->tg);
@ -111,6 +108,19 @@ static void sched_switch_user(struct task_struct *p)
sched_move_task(p); sched_move_task(p);
} }
#else /* CONFIG_FAIR_USER_SCHED */
static void sched_destroy_user(struct user_struct *up) { }
static int sched_create_user(struct user_struct *up) { return 0; }
static void sched_switch_user(struct task_struct *p) { }
#endif /* CONFIG_FAIR_USER_SCHED */
#if defined(CONFIG_FAIR_USER_SCHED) && defined(CONFIG_SYSFS)
static struct kobject uids_kobject; /* represents /sys/kernel/uids directory */
static DEFINE_MUTEX(uids_mutex);
static inline void uids_mutex_lock(void) static inline void uids_mutex_lock(void)
{ {
mutex_lock(&uids_mutex); mutex_lock(&uids_mutex);
@ -257,11 +267,8 @@ static inline void free_user(struct user_struct *up, unsigned long flags)
schedule_work(&up->work); schedule_work(&up->work);
} }
#else /* CONFIG_FAIR_USER_SCHED */ #else /* CONFIG_FAIR_USER_SCHED && CONFIG_SYSFS */
static void sched_destroy_user(struct user_struct *up) { }
static int sched_create_user(struct user_struct *up) { return 0; }
static void sched_switch_user(struct task_struct *p) { }
static inline int user_kobject_create(struct user_struct *up) { return 0; } static inline int user_kobject_create(struct user_struct *up) { return 0; }
static inline void uids_mutex_lock(void) { } static inline void uids_mutex_lock(void) { }
static inline void uids_mutex_unlock(void) { } static inline void uids_mutex_unlock(void) { }
@ -280,7 +287,7 @@ static inline void free_user(struct user_struct *up, unsigned long flags)
kmem_cache_free(uid_cachep, up); kmem_cache_free(uid_cachep, up);
} }
#endif /* CONFIG_FAIR_USER_SCHED */ #endif
/* /*
* Locate the user_struct for the passed UID. If found, take a ref on it. The * Locate the user_struct for the passed UID. If found, take a ref on it. The