mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 13:26:42 +07:00
4743775c6d
Extend ifnullfree to the various destroy functions that were recently extended to tolerate NULL arguments. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Michal Marek <mmarek@suse.cz>
58 lines
1.2 KiB
Plaintext
58 lines
1.2 KiB
Plaintext
/// 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.
|
|
// Comments: -
|
|
// Options: --no-includes --include-headers
|
|
|
|
virtual patch
|
|
virtual org
|
|
virtual report
|
|
virtual context
|
|
|
|
@r2 depends on patch@
|
|
expression E;
|
|
@@
|
|
- if (E != NULL)
|
|
(
|
|
kfree(E);
|
|
|
|
|
debugfs_remove(E);
|
|
|
|
|
debugfs_remove_recursive(E);
|
|
|
|
|
usb_free_urb(E);
|
|
|
|
|
kmem_cache_destroy(E);
|
|
|
|
|
mempool_destroy(E);
|
|
|
|
|
dma_pool_destroy(E);
|
|
)
|
|
|
|
@r depends on context || report || org @
|
|
expression E;
|
|
position p;
|
|
@@
|
|
|
|
* if (E != NULL)
|
|
* \(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|
|
|
* usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
|
|
* dma_pool_destroy@p\)(E);
|
|
|
|
@script:python depends on org@
|
|
p << r.p;
|
|
@@
|
|
|
|
cocci.print_main("NULL check before that freeing function is not needed", p)
|
|
|
|
@script:python depends on report@
|
|
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."
|
|
coccilib.report.print_report(p[0], msg)
|