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locking, ARM: Annotate low level hw locks as raw

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Annotate the low level hardware locks which must not be preempted.

In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
2009-07-03 08:44:46 -05:00
committed by Ingo Molnar
parent a1741e7fcb
commit bd31b85960
18 changed files with 110 additions and 110 deletions
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20
arch/arm/kernel/traps.c
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@@ -255,7 +255,7 @@ static int __die(const char *str, int err, struct thread_info *thread, struct pt
return ret;
}
static DEFINE_SPINLOCK(die_lock);
static DEFINE_RAW_SPINLOCK(die_lock);
/*
* This function is protected against re-entrancy.
@@ -267,7 +267,7 @@ void die(const char *str, struct pt_regs *regs, int err)
oops_enter();
spin_lock_irq(&die_lock);
raw_spin_lock_irq(&die_lock);
console_verbose();
bust_spinlocks(1);
ret = __die(str, err, thread, regs);
@@ -277,7 +277,7 @@ void die(const char *str, struct pt_regs *regs, int err)
bust_spinlocks(0);
add_taint(TAINT_DIE);
spin_unlock_irq(&die_lock);
raw_spin_unlock_irq(&die_lock);
oops_exit();
if (in_interrupt())
@@ -302,24 +302,24 @@ void arm_notify_die(const char *str, struct pt_regs *regs,
}
static LIST_HEAD(undef_hook);
static DEFINE_SPINLOCK(undef_lock);
static DEFINE_RAW_SPINLOCK(undef_lock);
void register_undef_hook(struct undef_hook *hook)
{
unsigned long flags;
spin_lock_irqsave(&undef_lock, flags);
raw_spin_lock_irqsave(&undef_lock, flags);
list_add(&hook->node, &undef_hook);
spin_unlock_irqrestore(&undef_lock, flags);
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
void unregister_undef_hook(struct undef_hook *hook)
{
unsigned long flags;
spin_lock_irqsave(&undef_lock, flags);
raw_spin_lock_irqsave(&undef_lock, flags);
list_del(&hook->node);
spin_unlock_irqrestore(&undef_lock, flags);
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
static int call_undef_hook(struct pt_regs *regs, unsigned int instr)
@@ -328,12 +328,12 @@ static int call_undef_hook(struct pt_regs *regs, unsigned int instr)
unsigned long flags;
int (*fn)(struct pt_regs *regs, unsigned int instr) = NULL;
spin_lock_irqsave(&undef_lock, flags);
raw_spin_lock_irqsave(&undef_lock, flags);
list_for_each_entry(hook, &undef_hook, node)
if ((instr & hook->instr_mask) == hook->instr_val &&
(regs->ARM_cpsr & hook->cpsr_mask) == hook->cpsr_val)
fn = hook->fn;
spin_unlock_irqrestore(&undef_lock, flags);
raw_spin_unlock_irqrestore(&undef_lock, flags);
return fn ? fn(regs, instr) : 1;
}