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| author | Matt Helsley <matthltc@us.ibm.com> | 2008-10-18 20:27:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-20 08:52:33 -0700 |
| commit | 8174f1503f4bf7e9a14b3fbbfdb30c6be6e29f77 (patch) | |
| tree | a8df1ebd62255dd231452b3f72782604e8919991 /include/linux/freezer.h | |
| parent | 83224b08372be48d5fcefedc4886457da29130c8 (diff) | |
| download | lwn-8174f1503f4bf7e9a14b3fbbfdb30c6be6e29f77.tar.gz lwn-8174f1503f4bf7e9a14b3fbbfdb30c6be6e29f77.zip | |
container freezer: make refrigerator always available
Now that the TIF_FREEZE flag is available in all architectures, extract
the refrigerator() and freeze_task() from kernel/power/process.c and make
it available to all.
The refrigerator() can now be used in a control group subsystem
implementing a control group freezer.
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Tested-by: Matt Helsley <matthltc@us.ibm.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/freezer.h')
| -rw-r--r-- | include/linux/freezer.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/include/linux/freezer.h b/include/linux/freezer.h index deddeedf3257..17e3bb42dd3c 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -6,7 +6,7 @@ #include <linux/sched.h> #include <linux/wait.h> -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_FREEZER /* * Check if a process has been frozen */ @@ -39,6 +39,11 @@ static inline void clear_freeze_flag(struct task_struct *p) clear_tsk_thread_flag(p, TIF_FREEZE); } +static inline bool should_send_signal(struct task_struct *p) +{ + return !(p->flags & PF_FREEZER_NOSIG); +} + /* * Wake up a frozen process * @@ -75,6 +80,9 @@ static inline int try_to_freeze(void) return 0; } +extern bool freeze_task(struct task_struct *p, bool sig_only); +extern void cancel_freezing(struct task_struct *p); + /* * The PF_FREEZER_SKIP flag should be set by a vfork parent right before it * calls wait_for_completion(&vfork) and reset right after it returns from this @@ -166,7 +174,7 @@ static inline void set_freezable_with_signal(void) } while (try_to_freeze()); \ __retval; \ }) -#else /* !CONFIG_PM_SLEEP */ +#else /* !CONFIG_FREEZER */ static inline int frozen(struct task_struct *p) { return 0; } static inline int freezing(struct task_struct *p) { return 0; } static inline void set_freeze_flag(struct task_struct *p) {} @@ -191,6 +199,6 @@ static inline void set_freezable_with_signal(void) {} #define wait_event_freezable_timeout(wq, condition, timeout) \ wait_event_interruptible_timeout(wq, condition, timeout) -#endif /* !CONFIG_PM_SLEEP */ +#endif /* !CONFIG_FREEZER */ #endif /* FREEZER_H_INCLUDED */ |