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-rw-r--r--scripts/coccinelle/locks/call_kern.cocci74
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 @@
1/// Find functions that refer to GFP_KERNEL but are called with locks held.
2/// The proposed change of converting the GFP_KERNEL is not necessarily the
3/// correct one. It may be desired to unlock the lock, or to not call the
4/// function under the lock in the first place.
5///
6// Confidence: Moderate
7// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
8// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
9// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
10// URL: http://coccinelle.lip6.fr/
11// Comments:
12// Options: -no_includes -include_headers
13
14virtual patch
15
16@gfp exists@
17identifier fn;
18position p;
19@@
20
21fn(...) {
22 ... when != read_unlock_irq(...)
23 when != write_unlock_irq(...)
24 when != read_unlock_irqrestore(...)
25 when != write_unlock_irqrestore(...)
26 when != spin_unlock(...)
27 when != spin_unlock_irq(...)
28 when != spin_unlock_irqrestore(...)
29 when != local_irq_enable(...)
30 when any
31 GFP_KERNEL@p
32 ... when any
33}
34
35@locked@
36identifier gfp.fn;
37@@
38
39(
40read_lock_irq
41|
42write_lock_irq
43|
44read_lock_irqsave
45|
46write_lock_irqsave
47|
48spin_lock
49|
50spin_trylock
51|
52spin_lock_irq
53|
54spin_lock_irqsave
55|
56local_irq_disable
57)
58 (...)
59... when != read_unlock_irq(...)
60 when != write_unlock_irq(...)
61 when != read_unlock_irqrestore(...)
62 when != write_unlock_irqrestore(...)
63 when != spin_unlock(...)
64 when != spin_unlock_irq(...)
65 when != spin_unlock_irqrestore(...)
66 when != local_irq_enable(...)
67fn(...)
68
69@depends on locked@
70position gfp.p;
71@@
72
73- GFP_KERNEL@p
74+ GFP_ATOMIC