Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
82 lines
1.6 KiB
Plaintext
82 lines
1.6 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0-only
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/// Find nested lock+irqsave functions that use the same flags variables
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///
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// Confidence: High
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// Copyright: (C) 2010-2012 Nicolas Palix.
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// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
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// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
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// URL: https://coccinelle.gitlabpages.inria.fr/website
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// Comments:
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// Options: --no-includes --include-headers
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virtual context
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virtual org
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virtual report
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@r exists@
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expression lock1,lock2,flags;
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position p1,p2;
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@@
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(
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spin_lock_irqsave@p1(lock1,flags)
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read_lock_irqsave@p1(lock1,flags)
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write_lock_irqsave@p1(lock1,flags)
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)
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... when != flags
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(
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spin_lock_irqsave(lock1,flags)
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read_lock_irqsave(lock1,flags)
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write_lock_irqsave(lock1,flags)
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spin_lock_irqsave@p2(lock2,flags)
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read_lock_irqsave@p2(lock2,flags)
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write_lock_irqsave@p2(lock2,flags)
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)
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@d exists@
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expression f <= r.flags;
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expression lock1,lock2,flags;
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position r.p1, r.p2;
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@@
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(
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*spin_lock_irqsave@p1(lock1,flags)
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*read_lock_irqsave@p1(lock1,flags)
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*write_lock_irqsave@p1(lock1,flags)
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)
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... when != f
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(
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*spin_lock_irqsave@p2(lock2,flags)
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*read_lock_irqsave@p2(lock2,flags)
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*write_lock_irqsave@p2(lock2,flags)
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)
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// ----------------------------------------------------------------------
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@script:python depends on d && org@
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p1 << r.p1;
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p2 << r.p2;
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@@
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cocci.print_main("original lock",p1)
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cocci.print_secs("nested lock+irqsave that reuses flags",p2)
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@script:python depends on d && report@
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p1 << r.p1;
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p2 << r.p2;
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@@
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msg="ERROR: nested lock+irqsave that reuses flags from line %s." % (p1[0].line)
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coccilib.report.print_report(p2[0], msg)
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