/// PTR_ERR should be applied before its argument is reassigned, typically
/// to NULL
///
// Confidence: High
// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: --no-includes --include-headers

virtual org
virtual report
virtual context

@r exists@
expression e,e1;
constant c;
position p1,p2;
@@

*e@p1 = c
... when != e = e1
    when != &e
    when != true IS_ERR(e)
*PTR_ERR@p2(e)

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

cocci.print_main("PTR_ERR",p2)
cocci.print_secs("assignment",p1)

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

msg = "ERROR: PTR_ERR applied after initialization to constant on line %s" % (p1[0].line)
coccilib.report.print_report(p2[0],msg)
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<input type='hidden' name='id' value='64679e565a4a099c5d5dc2ecf103dcaf039ef8c7'/><select name='h' onchange='this.form.submit();'>
<option value='emaclite-cleanup'>emaclite-cleanup</option>
<option value='master'>master</option>
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<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
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<option value='grep'>log msg</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=64679e565a4a099c5d5dc2ecf103dcaf039ef8c7'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?h=nds-private-remove&amp;id=64679e565a4a099c5d5dc2ecf103dcaf039ef8c7'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/wireless?h=nds-private-remove&amp;id=64679e565a4a099c5d5dc2ecf103dcaf039ef8c7'>wireless</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/wireless/.gitignore?h=nds-private-remove&amp;id=64679e565a4a099c5d5dc2ecf103dcaf039ef8c7'>.gitignore</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/wireless/.gitignore?h=nds-private-remove&amp;id=64679e565a4a099c5d5dc2ecf103dcaf039ef8c7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>