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Directory : /proc/self/root/usr/src/kernels/3.10.0-1160.118.1.el7.x86_64/scripts/coccinelle/locks/

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Current File : /proc/self/root/usr/src/kernels/3.10.0-1160.118.1.el7.x86_64/scripts/coccinelle/locks/flags.cocci

/// Find nested lock+irqsave functions that use the same flags variables
///
// Confidence: High
// Copyright: (C) 2010-2012 Nicolas Palix.  GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.  GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.  GPLv2.
// 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;
@@

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

@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)

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