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authorIngo Molnar <mingo@elte.hu>2006-06-27 02:54:53 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-27 17:32:47 -0700
commit23f78d4a03c53cbd75d87a795378ea540aa08c86 (patch)
tree27dfe06337990911380fe8c5949ae9acd8e9568a /kernel/fork.c
parentb29739f902ee76a05493fb7d2303490fc75364f4 (diff)
[PATCH] pi-futex: rt mutex core
Core functions for the rt-mutex subsystem. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 9b4e54ef022..b664a081fff 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -104,6 +104,7 @@ static kmem_cache_t *mm_cachep;
void free_task(struct task_struct *tsk)
{
free_thread_info(tsk->thread_info);
+ rt_mutex_debug_task_free(tsk);
free_task_struct(tsk);
}
EXPORT_SYMBOL(free_task);
@@ -913,6 +914,19 @@ asmlinkage long sys_set_tid_address(int __user *tidptr)
return current->pid;
}
+static inline void rt_mutex_init_task(struct task_struct *p)
+{
+#ifdef CONFIG_RT_MUTEXES
+ spin_lock_init(&p->pi_lock);
+ plist_head_init(&p->pi_waiters, &p->pi_lock);
+ p->pi_blocked_on = NULL;
+# ifdef CONFIG_DEBUG_RT_MUTEXES
+ spin_lock_init(&p->held_list_lock);
+ INIT_LIST_HEAD(&p->held_list_head);
+# endif
+#endif
+}
+
/*
* This creates a new process as a copy of the old one,
* but does not actually start it yet.
@@ -1034,6 +1048,8 @@ static task_t *copy_process(unsigned long clone_flags,
mpol_fix_fork_child_flag(p);
#endif
+ rt_mutex_init_task(p);
+
#ifdef CONFIG_DEBUG_MUTEXES
p->blocked_on = NULL; /* not blocked yet */
#endif