diff options
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/Kconfig | 9 | ||||
| -rw-r--r-- | kernel/power/process.c | 21 |
2 files changed, 17 insertions, 13 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index 710ed084e7c5..ed296225dcd4 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -20,13 +20,14 @@ config PM sending the processor to sleep and saving power. config PM_LEGACY - bool "Legacy Power Management API" + bool "Legacy Power Management API (DEPRECATED)" depends on PM - default y + default n ---help--- - Support for pm_register() and friends. + Support for pm_register() and friends. This old API is obsoleted + by the driver model. - If unsure, say Y. + If unsure, say N. config PM_DEBUG bool "Power Management Debug Support" diff --git a/kernel/power/process.c b/kernel/power/process.c index 99eeb119b06d..6d566bf7085c 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -28,8 +28,7 @@ static inline int freezeable(struct task_struct * p) if ((p == current) || (p->flags & PF_NOFREEZE) || (p->exit_state == EXIT_ZOMBIE) || - (p->exit_state == EXIT_DEAD) || - (p->state == TASK_STOPPED)) + (p->exit_state == EXIT_DEAD)) return 0; return 1; } @@ -61,10 +60,16 @@ static inline void freeze_process(struct task_struct *p) unsigned long flags; if (!freezing(p)) { - freeze(p); - spin_lock_irqsave(&p->sighand->siglock, flags); - signal_wake_up(p, 0); - spin_unlock_irqrestore(&p->sighand->siglock, flags); + rmb(); + if (!frozen(p)) { + if (p->state == TASK_STOPPED) + force_sig_specific(SIGSTOP, p); + + freeze(p); + spin_lock_irqsave(&p->sighand->siglock, flags); + signal_wake_up(p, p->state == TASK_STOPPED); + spin_unlock_irqrestore(&p->sighand->siglock, flags); + } } } @@ -103,9 +108,7 @@ static unsigned int try_to_freeze_tasks(int freeze_user_space) if (frozen(p)) continue; - if (p->state == TASK_TRACED && - (frozen(p->parent) || - p->parent->state == TASK_STOPPED)) { + if (p->state == TASK_TRACED && frozen(p->parent)) { cancel_freezing(p); continue; } |