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Merge remote branch 'tip/x86/entry' into kvm-updates/2.6.33

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Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2009-12-03 09:30:06 +02:00
commit 58988b07cf
9 changed files with 119 additions and 2 deletions
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49
include/linux/user-return-notifier.h Normal file
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#ifndef _LINUX_USER_RETURN_NOTIFIER_H
#define _LINUX_USER_RETURN_NOTIFIER_H
#ifdef CONFIG_USER_RETURN_NOTIFIER
#include <linux/list.h>
#include <linux/sched.h>
struct user_return_notifier {
void (*on_user_return)(struct user_return_notifier *urn);
struct hlist_node link;
};
void user_return_notifier_register(struct user_return_notifier *urn);
void user_return_notifier_unregister(struct user_return_notifier *urn);
static inline void propagate_user_return_notify(struct task_struct *prev,
struct task_struct *next)
{
if (test_tsk_thread_flag(prev, TIF_USER_RETURN_NOTIFY)) {
clear_tsk_thread_flag(prev, TIF_USER_RETURN_NOTIFY);
set_tsk_thread_flag(next, TIF_USER_RETURN_NOTIFY);
}
}
void fire_user_return_notifiers(void);
static inline void clear_user_return_notifier(struct task_struct *p)
{
clear_tsk_thread_flag(p, TIF_USER_RETURN_NOTIFY);
}
#else
struct user_return_notifier {};
static inline void propagate_user_return_notify(struct task_struct *prev,
struct task_struct *next)
{
}
static inline void fire_user_return_notifiers(void) {}
static inline void clear_user_return_notifier(struct task_struct *p) {}
#endif
#endif