diff options
Diffstat (limited to '')
-rw-r--r-- | scripts/coccinelle/locks/call_kern.cocci | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/scripts/coccinelle/locks/call_kern.cocci b/scripts/coccinelle/locks/call_kern.cocci new file mode 100644 index 000000000..5ca0d81b0 --- /dev/null +++ b/scripts/coccinelle/locks/call_kern.cocci @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// 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) 2012 Nicolas Palix. +// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. +// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. +// URL: http://coccinelle.lip6.fr/ +// Comments: +// Options: --no-includes --include-headers + +virtual patch +virtual context +virtual org +virtual report + +@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 exists@ +identifier gfp.fn; +position p1,p2; +@@ + +( +read_lock_irq@p1 +| +write_lock_irq@p1 +| +read_lock_irqsave@p1 +| +write_lock_irqsave@p1 +| +spin_lock@p1 +| +spin_trylock@p1 +| +spin_lock_irq@p1 +| +spin_lock_irqsave@p1 +| +local_irq_disable@p1 +) + (...) +... 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@p2(...) + +@depends on locked && patch@ +position gfp.p; +@@ + +- GFP_KERNEL@p ++ GFP_ATOMIC + +@depends on locked && !patch@ +position gfp.p; +@@ + +* GFP_KERNEL@p + +@script:python depends on !patch && org@ +p << gfp.p; +fn << gfp.fn; +p1 << locked.p1; +p2 << locked.p2; +@@ + +cocci.print_main("lock",p1) +cocci.print_secs("call",p2) +cocci.print_secs("GFP_KERNEL",p) + +@script:python depends on !patch && report@ +p << gfp.p; +fn << gfp.fn; +p1 << locked.p1; +p2 << locked.p2; +@@ + +msg = "ERROR: function %s called on line %s inside lock on line %s but uses GFP_KERNEL" % (fn,p2[0].line,p1[0].line) +coccilib.report.print_report(p[0], msg) |