FM / locks

/usr/src/linux-headers-5.15.0-190/scripts/coccinelle/locks/

/usr/src/linux-headers-5.15.0-190/scripts/coccinelle/locks

Name	Size	Mode	Actions
call_kern.cocci	2179	0644	edit dl rm
double_lock.cocci	1575	0644	edit dl rm
flags.cocci	1589	0644	edit dl rm
mini_lock.cocci	1791	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/scripts/coccinelle/locks/flags.cocci (1589B)

// SPDX-License-Identifier: GPL-2.0-only
/// Find nested lock+irqsave functions that use the same flags variables
///
// Confidence: High
// Copyright: (C) 2010-2012 Nicolas Palix.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: --no-includes --include-headers

virtual context
virtual org
virtual report

@r exists@
expression lock1,lock2,flags;
position p1,p2;
@@

@d exists@
expression f <= r.flags;
expression lock1,lock2,flags;
position r.p1, r.p2;
@@

(
*spin_lock_irqsave@p1(lock1,flags)
|
*read_lock_irqsave@p1(lock1,flags)
|
*write_lock_irqsave@p1(lock1,flags)
)
... when != f
(
*spin_lock_irqsave@p2(lock2,flags)
|
*read_lock_irqsave@p2(lock2,flags)
|
*write_lock_irqsave@p2(lock2,flags)
)

// ----------------------------------------------------------------------

@script:python depends on d && org@
p1 << r.p1;
p2 << r.p2;
@@

cocci.print_main("original lock",p1)
cocci.print_secs("nested lock+irqsave that reuses flags",p2)

@script:python depends on d && report@
p1 << r.p1;
p2 << r.p2;
@@

msg="ERROR: nested lock+irqsave that reuses flags from line %s." % (p1[0].line)
coccilib.report.print_report(p2[0], msg)

cmd: