Commit f567a185 authored by Manfred Spraul's avatar Manfred Spraul Committed by Linus Torvalds

include/linux/sem.h: make sysv_sem empty if SYSVIPC is disabled

For the sysvsem undo, each task struct contains a sysv_sem structure with
a pointer to the undo information.

This pointer is only necessary if sysvipc is enabled - thus the pointer
can be made conditional on CONFIG_SYSVIPC.
Signed-off-by: default avatarManfred Spraul <manfred@colorfullife.com>
Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e57940d7
...@@ -96,16 +96,21 @@ struct sem_array { ...@@ -96,16 +96,21 @@ struct sem_array {
int complex_count; /* pending complex operations */ int complex_count; /* pending complex operations */
}; };
#ifdef CONFIG_SYSVIPC
struct sysv_sem { struct sysv_sem {
struct sem_undo_list *undo_list; struct sem_undo_list *undo_list;
}; };
#ifdef CONFIG_SYSVIPC
extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk); extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk);
extern void exit_sem(struct task_struct *tsk); extern void exit_sem(struct task_struct *tsk);
#else #else
struct sysv_sem {
/* empty */
};
static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk) static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk)
{ {
return 0; return 0;
......
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