1 // SPDX-License-Identifier: GPL-2.0-only
2 /// Since commit b37a46683739 ("netdevice: add the case if dev is NULL"),
3 /// NULL check before dev_{put, hold} functions is not needed.
4 ///
5 /// Based on ifnullfree.cocci by Fabian Frederick.
6 ///
7 // Copyright: (C) 2022 Ziyang Xuan.
8 // Comments: -
9 // Options: --no-includes --include-headers
10 // Version min: 5.15
11
12 virtual patch
13 virtual org
14 virtual report
15 virtual context
16
17 @r2 depends on patch@
18 expression E;
19 @@
20 - if (E != NULL)
21 (
22 __dev_put(E);
23 |
24 dev_put(E);
25 |
26 dev_put_track(E, ...);
27 |
28 __dev_hold(E);
29 |
30 dev_hold(E);
31 |
32 dev_hold_track(E, ...);
33 )
34
35 @r depends on context || report || org @
36 expression E;
37 position p;
38 @@
39
40 * if (E != NULL)
41 * \(__dev_put@p\|dev_put@p\|dev_put_track@p\|__dev_hold@p\|dev_hold@p\|
42 * dev_hold_track@p\)(E, ...);
43
44 @script:python depends on org@
45 p << r.p;
46 @@
47
48 cocci.print_main("NULL check before dev_{put, hold} functions is not needed", p)
49
50 @script:python depends on report@
51 p << r.p;
52 @@
53
54 msg = "WARNING: NULL check before dev_{put, hold} functions is not needed."
55 coccilib.report.print_report(p[0], msg)
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