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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2010-10-25 16:10:12 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:15 +0200 |
| commit | 6931be0803ddae2791f3c646c8e1e0f82ca26013 (patch) | |
| tree | 56bec1c2155be70d4202c4096fbb5eca0fad1bac /arch/s390 | |
| parent | 80217147a3d80c8a4e48f06e2f6e965455f3fe2a (diff) | |
| download | lwn-6931be0803ddae2791f3c646c8e1e0f82ca26013.tar.gz lwn-6931be0803ddae2791f3c646c8e1e0f82ca26013.zip | |
[S390] cpu hotplug/idle: move cpu_die call to enabled context
There is no difference if cpu_die is called from enabled or disabled
context. Except that the fast_gup code might be called via
cpu_die -> idle_task_exit -> __mm_drop -> crst_table_free. Which in
turn grabs and releases a spinlock using the _bh ops, which is not
allowed in irq disabled context, since spin_unlock_bh will
unconditionally enable interrupts again.
To get rid of the warning emitted by the softirq code just move the
code to enabled context.
In this case this doesn't fix a bug, we just get rid of a warning.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/process.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index d3a2d1c6438e..ec2e03b22ead 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -76,17 +76,17 @@ unsigned long thread_saved_pc(struct task_struct *tsk) static void default_idle(void) { /* CPU is going idle. */ - local_irq_disable(); - if (need_resched()) { - local_irq_enable(); - return; - } #ifdef CONFIG_HOTPLUG_CPU if (cpu_is_offline(smp_processor_id())) { preempt_enable_no_resched(); cpu_die(); } #endif + local_irq_disable(); + if (need_resched()) { + local_irq_enable(); + return; + } local_mcck_disable(); if (test_thread_flag(TIF_MCCK_PENDING)) { local_mcck_enable(); |