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| author | Ziyang Xuan <william.xuanziyang@huawei.com> | 2022-06-16 09:32:53 +0800 |
|---|---|---|
| committer | Julia Lawall <Julia.Lawall@inria.fr> | 2022-07-16 15:33:55 +0200 |
| commit | bbd5c96850d9de535a83a3a3842dec2169cb31d1 (patch) | |
| tree | 4f964216263f2e06bae4a6fa60906f9b17de0eaf /scripts/coccinelle | |
| parent | 8e54fe1b0f03a89925925ed98acd2219e0c956d4 (diff) | |
| download | linux-bbd5c96850d9de535a83a3a3842dec2169cb31d1.tar.bz2 | |
scripts/coccinelle/free: add NULL test before dev_{put, hold} functions
Since commit b37a46683739 ("netdevice: add the case if dev is NULL"),
NULL check before dev_{put, hold} functions is not needed.
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'scripts/coccinelle')
| -rw-r--r-- | scripts/coccinelle/free/ifnulldev_put.cocci | 54 |
1 files changed, 54 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..7ff36e6212ba --- /dev/null +++ b/scripts/coccinelle/free/ifnulldev_put.cocci @@ -0,0 +1,54 @@ +// 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 + +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) |