diff options
| author | Heinrich Schuchardt | 2020-04-19 11:56:02 +0200 |
|---|---|---|
| committer | Tom Rini | 2020-04-24 16:40:09 -0400 |
| commit | c11f0d88ba462976335a4990a30a99d1d0b49195 (patch) | |
| tree | 5c76d1640a2d27dff9dc61b2aa098e277fa992c3 /scripts | |
| parent | cb2a2ebd4f93220936de721918ed9a3ca57cc5db (diff) | |
coccinelle: adjust NULL check before free()
The free() function checks if its argument is NULL. We should avoid
checking for NULL before calling free like in
if (result->tds)
free(result->tds);
The list of relevant functions differs between Linux and U-Boot, e.g. we
use free().
Adjust the list of relevant functions.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/coccinelle/free/ifnullfree.cocci | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/scripts/coccinelle/free/ifnullfree.cocci b/scripts/coccinelle/free/ifnullfree.cocci index 14a4cd98e83..2d59545d7d4 100644 --- a/scripts/coccinelle/free/ifnullfree.cocci +++ b/scripts/coccinelle/free/ifnullfree.cocci @@ -1,10 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0-only /// NULL check before some freeing functions is not needed. /// /// Based on checkpatch warning /// "kfree(NULL) is safe this check is probably not required" /// and kfreeaddr.cocci by Julia Lawall. /// -// Copyright: (C) 2014 Fabian Frederick. GPLv2. +// Copyright: (C) 2014 Fabian Frederick. // Comments: - // Options: --no-includes --include-headers @@ -18,21 +19,19 @@ expression E; @@ - if (E != NULL) ( - kfree(E); + free(E); | - kzfree(E); + kfree(E); | - debugfs_remove(E); + vfree(E); | - debugfs_remove_recursive(E); + vfree_recursive(E); | - usb_free_urb(E); + kmem_cache_free(E); | kmem_cache_destroy(E); | - mempool_destroy(E); -| - dma_pool_destroy(E); + gzfree(E); ) @r depends on context || report || org @ @@ -41,9 +40,8 @@ position p; @@ * if (E != NULL) -* \(kfree@p\|kzfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\| -* usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\| -* dma_pool_destroy@p\)(E); +* \(free@p\|kfree@p\|vfree@p\|debugfs_remove_recursive@p\| +* kmem_cache_free@p\|kmem_cache_destroy@p\|gzfree@p\)(E); @script:python depends on org@ p << r.p; @@ -55,5 +53,5 @@ cocci.print_main("NULL check before that freeing function is not needed", p) p << r.p; @@ -msg = "WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values." +msg = "WARNING: NULL check before some freeing functions is not needed." coccilib.report.print_report(p[0], msg) |