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Add scripts/coccinelle/err_cast.cocci 

Add a Coccinelle file to use the ERR_CAST function

Before the release 2.6.25, one had to use ERR_PTR(PTR_ERR(...))  to
convert the pointer type of an error. Since then, the function
ERR_CAST has been available for that purpose.

Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Nicolas Palix 2010-06-06 17:15:06 +02:00 committed by Michal Marek
parent 09c35396ec
commit f853f8305b
1 changed files with 56 additions and 0 deletions
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56
scripts/coccinelle/err_cast.cocci Normal file
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@ -0,0 +1,56 @@
///
/// Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...))
///
// Confidence: High
// Copyright: (C) 2009, 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2009, 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2009, 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Options:
//
// Keywords: ERR_PTR, PTR_ERR, ERR_CAST
// Version min: 2.6.25
//
virtual context
virtual patch
virtual org
virtual report
@ depends on context && !patch && !org && !report@
expression x;
@@
* ERR_PTR(PTR_ERR(x))
@ depends on !context && patch && !org && !report @
expression x;
@@
- ERR_PTR(PTR_ERR(x))
+ ERR_CAST(x)
@r depends on !context && !patch && (org || report)@
expression x;
position p;
@@
ERR_PTR@p(PTR_ERR(x))
@script:python depends on org@
p << r.p;
x << r.x;
@@
msg="WARNING ERR_CAST can be used with %s" % (x)
msg_safe=msg.replace("[","@(").replace("]",")")
coccilib.org.print_todo(p[0], msg_safe)
@script:python depends on report@
p << r.p;
x << r.x;
@@
msg="WARNING: ERR_CAST can be used with %s" % (x)
coccilib.report.print_report(p[0], msg)