summaryrefslogtreecommitdiff
path: root/drivers/idle
diff options
context:
space:
mode:
authorMike Galbraith <efault@gmx.de>2011-12-07 12:48:42 +0100
committerIngo Molnar <mingo@kernel.org>2013-02-19 08:42:47 +0100
commit066361a7c58cb6c8b18c7ce0ee8527bb1ce58460 (patch)
treef85ceaaf812d371256cb8c063c277c86d5472991 /drivers/idle
parenteece09ec213e93333010bf4c6bb9175b32229c54 (diff)
downloadkernel-066361a7c58cb6c8b18c7ce0ee8527bb1ce58460.tar.gz
intel_idle: Convert i7300_idle_lock to raw_spinlock
24 core Intel box's first exposure to 3.0.12-rt30-rc3 didn't go well. [ 27.104159] i7300_idle: loaded v1.55 [ 27.104192] BUG: scheduling while atomic: swapper/2/0/0x00000002 [ 27.104309] Pid: 0, comm: swapper/2 Tainted: G N 3.0.12-rt30-rc3-rt #1 [ 27.104317] Call Trace: [ 27.104338] [<ffffffff810046a5>] dump_trace+0x85/0x2e0 [ 27.104372] [<ffffffff8144eb00>] thread_return+0x12b/0x30b [ 27.104381] [<ffffffff8144f1b9>] schedule+0x29/0xb0 [ 27.104389] [<ffffffff814506e5>] rt_spin_lock_slowlock+0xc5/0x240 [ 27.104401] [<ffffffffa01f818f>] i7300_idle_notifier+0x3f/0x360 [i7300_idle] [ 27.104415] [<ffffffff814546c7>] notifier_call_chain+0x37/0x70 [ 27.104426] [<ffffffff81454748>] __atomic_notifier_call_chain+0x48/0x70 [ 27.104439] [<ffffffff81001a39>] cpu_idle+0x89/0xb0 [ 27.104449] bad: scheduling from the idle thread! This lock is taken from interrupt disabled context in the guts of idle. Convert it to a raw_spinlock. Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Andy Henroid <andrew.d.henroid@intel.com> Link: http://lkml.kernel.org/r/1323258522.5057.73.camel@marge.simson.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/idle')
-rw-r--r--drivers/idle/i7300_idle.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/idle/i7300_idle.c b/drivers/idle/i7300_idle.c
index fa080ebd568f..ffeebc7e9f1c 100644
--- a/drivers/idle/i7300_idle.c
+++ b/drivers/idle/i7300_idle.c
@@ -75,7 +75,7 @@ static unsigned long past_skip;
static struct pci_dev *fbd_dev;
-static spinlock_t i7300_idle_lock;
+static raw_spinlock_t i7300_idle_lock;
static int i7300_idle_active;
static u8 i7300_idle_thrtctl_saved;
@@ -457,7 +457,7 @@ static int i7300_idle_notifier(struct notifier_block *nb, unsigned long val,
idle_begin_time = ktime_get();
}
- spin_lock_irqsave(&i7300_idle_lock, flags);
+ raw_spin_lock_irqsave(&i7300_idle_lock, flags);
if (val == IDLE_START) {
cpumask_set_cpu(smp_processor_id(), idle_cpumask);
@@ -506,7 +506,7 @@ static int i7300_idle_notifier(struct notifier_block *nb, unsigned long val,
}
}
end:
- spin_unlock_irqrestore(&i7300_idle_lock, flags);
+ raw_spin_unlock_irqrestore(&i7300_idle_lock, flags);
return 0;
}
@@ -548,7 +548,7 @@ struct debugfs_file_info {
static int __init i7300_idle_init(void)
{
- spin_lock_init(&i7300_idle_lock);
+ raw_spin_lock_init(&i7300_idle_lock);
total_us = 0;
if (i7300_idle_platform_probe(&fbd_dev, &ioat_dev, forceload))