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Linux 4.18-rc5

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Merge tag 'v4.18-rc5' into locking/core, to pick up fixes

Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Ingo Molnar 2018-07-17 09:27:43 +02:00
commit 52b544bd38
992 changed files with 9422 additions and 4948 deletions
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28
lib/refcount.c
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@ -349,3 +349,31 @@ bool refcount_dec_and_lock(refcount_t *r, spinlock_t *lock)
}
EXPORT_SYMBOL(refcount_dec_and_lock);
/**
* refcount_dec_and_lock_irqsave - return holding spinlock with disabled
* interrupts if able to decrement refcount to 0
* @r: the refcount
* @lock: the spinlock to be locked
* @flags: saved IRQ-flags if the is acquired
*
* Same as refcount_dec_and_lock() above except that the spinlock is acquired
* with disabled interupts.
*
* Return: true and hold spinlock if able to decrement refcount to 0, false
* otherwise
*/
bool refcount_dec_and_lock_irqsave(refcount_t *r, spinlock_t *lock,
unsigned long *flags)
{
if (refcount_dec_not_one(r))
return false;
spin_lock_irqsave(lock, *flags);
if (!refcount_dec_and_test(r)) {
spin_unlock_irqrestore(lock, *flags);
return false;
}
return true;
}
EXPORT_SYMBOL(refcount_dec_and_lock_irqsave);