scripts/coccinelle/api/ptr_ret.cocci: semantic patch for ptr_err

///

/// Use PTR_RET rather than if(IS_ERR(...)) + PTR_ERR

///

// Confidence: High

// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.

// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.

// URL: http://coccinelle.lip6.fr/

// Options: -no_includes -include_headers

//

// Keywords: ERR_PTR, PTR_ERR, PTR_RET

// Version min: 2.6.39

//

virtual context

virtual patch

virtual org

virtual report

@depends on patch@

expression ptr;

@@

- if (IS_ERR(ptr)) return PTR_ERR(ptr); else return 0;

+ return PTR_RET(ptr);

@depends on patch@

expression ptr;

@@

- if (IS_ERR(ptr)) return PTR_ERR(ptr); return 0;

+ return PTR_RET(ptr);

@r1 depends on !patch@

expression ptr;

position p1;

@@

* if@p1 (IS_ERR(ptr)) return PTR_ERR(ptr); else return 0;

@r2 depends on !patch@

expression ptr;

position p2;

@@

* if@p2 (IS_ERR(ptr)) return PTR_ERR(ptr); return 0;

@script:python depends on org@

p << r1.p1;

@@

coccilib.org.print_todo(p[0], "WARNING: PTR_RET can be used")

@script:python depends on org@

p << r2.p2;

@@

coccilib.org.print_todo(p[0], "WARNING: PTR_RET can be used")

@script:python depends on report@

p << r1.p1;

@@

coccilib.report.print_report(p[0], "WARNING: PTR_RET can be used")

@script:python depends on report@

p << r2.p2;

@@

coccilib.report.print_report(p[0], "WARNING: PTR_RET can be used")