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| author | Arnd Bergmann <arnd@arndb.de> | 2012-03-15 15:19:05 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-03-15 15:20:07 +0000 |
| commit | f4e2467bad53023589cbff18dd1ab6e0aa3f004c (patch) | |
| tree | 8d7abbf418eabd25bbcdc9b6de2f8216d2eaa616 /kernel/hung_task.c | |
| parent | e3643b77de143c5548ec93abd8aa68f4123295ea (diff) | |
| parent | a6de3df4f172e124280d88e617ee7d29f7af970b (diff) | |
Merge branch 'ep93xx-for-arm-soc' of git://github.com/RyanMallon/linux-2.6 into next/cleanup
* 'ep93xx-for-arm-soc' of git://github.com/RyanMallon/linux-2.6:
ep93xx: Remove unnecessary includes of ep93xx-regs.h
ep93xx: Move EP93XX_SYSCON defines to SoC private header
ep93xx: Move crunch code to mach-ep93xx directory
ep93xx: Make syscon access functions private to SoC
ep93xx: Configure GPIO ports in core code
ep93xx: Move peripheral defines to local SoC header
ep93xx: Convert the watchdog driver into a platform device.
ep93xx: Use ioremap for backlight driver
ep93xx: Move GPIO defines to gpio-ep93xx.h
ep93xx: Don't use system controller defines in audio drivers
ep93xx: Move PHYS_BASE defines to local SoC header file
(update to v3.3-rc7)
Conflicts:
arch/arm/mach-s3c2440/common.h
Diffstat (limited to 'kernel/hung_task.c')
| -rw-r--r-- | kernel/hung_task.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 2e48ec0c2e9..c21449f85a2 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -119,15 +119,20 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) * For preemptible RCU it is sufficient to call rcu_read_unlock in order * to exit the grace period. For classic RCU, a reschedule is required. */ -static void rcu_lock_break(struct task_struct *g, struct task_struct *t) +static bool rcu_lock_break(struct task_struct *g, struct task_struct *t) { + bool can_cont; + get_task_struct(g); get_task_struct(t); rcu_read_unlock(); cond_resched(); rcu_read_lock(); + can_cont = pid_alive(g) && pid_alive(t); put_task_struct(t); put_task_struct(g); + + return can_cont; } /* @@ -154,9 +159,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout) goto unlock; if (!--batch_count) { batch_count = HUNG_TASK_BATCHING; - rcu_lock_break(g, t); - /* Exit if t or g was unhashed during refresh. */ - if (t->state == TASK_DEAD || g->state == TASK_DEAD) + if (!rcu_lock_break(g, t)) goto unlock; } /* use "==" to skip the TASK_KILLABLE tasks waiting on NFS */ |