diff options
| -rw-r--r-- | scripts/coccinelle/locks/call_kern.cocci | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/scripts/coccinelle/locks/call_kern.cocci b/scripts/coccinelle/locks/call_kern.cocci new file mode 100644 index 00000000000..00af5344a68 --- /dev/null +++ b/scripts/coccinelle/locks/call_kern.cocci @@ -0,0 +1,74 @@ +/// 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 +| +write_lock_irq +| +read_lock_irqsave +| +write_lock_irqsave +| +spin_lock +| +spin_trylock +| +spin_lock_irq +| +spin_lock_irqsave +| +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 |