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/// Find functions that refer to GFP_KERNEL but are called with locks held.
/// The proposed change of converting the GFP_KERNEL is not necessarily the
/// correct one. It may be desired to unlock the lock, or to not call the
/// function under the lock in the first place.
///
// Confidence: Moderate
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
@gfp exists@
identifier fn;
position p;
@@
fn(...) {
... when != read_unlock_irq(...)
when != write_unlock_irq(...)
when != read_unlock_irqrestore(...)
when != write_unlock_irqrestore(...)
when != spin_unlock(...)
when != spin_unlock_irq(...)
when != spin_unlock_irqrestore(...)
when != local_irq_enable(...)
when any
GFP_KERNEL@p
... when any
}
@locked@
identifier gfp.fn;
@@
(
read_lock_irq
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write_lock_irq
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read_lock_irqsave
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write_lock_irqsave
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spin_lock
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spin_trylock
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spin_lock_irq
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spin_lock_irqsave
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local_irq_disable
)
(...)
... when != read_unlock_irq(...)
when != write_unlock_irq(...)
when != read_unlock_irqrestore(...)
when != write_unlock_irqrestore(...)
when != spin_unlock(...)
when != spin_unlock_irq(...)
when != spin_unlock_irqrestore(...)
when != local_irq_enable(...)
fn(...)
@depends on locked@
position gfp.p;
@@
- GFP_KERNEL@p
+ GFP_ATOMIC
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