diff options
Diffstat (limited to 'scripts/coccinelle/free/ifnulldev_put.cocci')
| -rw-r--r-- | scripts/coccinelle/free/ifnulldev_put.cocci | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/scripts/coccinelle/free/ifnulldev_put.cocci b/scripts/coccinelle/free/ifnulldev_put.cocci new file mode 100644 index 000000000000..2bd2e8fae485 --- /dev/null +++ b/scripts/coccinelle/free/ifnulldev_put.cocci @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// Since commit b37a46683739 ("netdevice: add the case if dev is NULL"), +/// NULL check before dev_{put, hold} functions is not needed. +/// +/// Based on ifnullfree.cocci by Fabian Frederick. +/// +// Copyright: (C) 2022 Ziyang Xuan. +// Comments: - +// Options: --no-includes --include-headers +// Version min: 5.15 + +virtual patch +virtual org +virtual report +virtual context + +@r2 depends on patch@ +expression E; +@@ +- if (E != NULL) +( + __dev_put(E); +| + dev_put(E); +| + dev_put_track(E, ...); +| + __dev_hold(E); +| + dev_hold(E); +| + dev_hold_track(E, ...); +) + +@r depends on context || report || org @ +expression E; +position p; +@@ + +* if (E != NULL) +* \(__dev_put@p\|dev_put@p\|dev_put_track@p\|__dev_hold@p\|dev_hold@p\| +* dev_hold_track@p\)(E, ...); + +@script:python depends on org@ +p << r.p; +@@ + +cocci.print_main("NULL check before dev_{put, hold} functions is not needed", p) + +@script:python depends on report@ +p << r.p; +@@ + +msg = "WARNING: NULL check before dev_{put, hold} functions is not needed." +coccilib.report.print_report(p[0], msg) |