Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/scripts/coccinelle/free/ifnullfree.cocci b/scripts/coccinelle/free/ifnullfree.cocci
new file mode 100644
index 000000000..a70e123cb
--- /dev/null
+++ b/scripts/coccinelle/free/ifnullfree.cocci
@@ -0,0 +1,59 @@
+/// 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);
+|
+  kzfree(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)
+*	\(kfree@p\|kzfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|
+*         usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
+*         dma_pool_destroy@p\)(E);
+
+@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 some freeing functions is not needed."
+coccilib.report.print_report(p[0], msg)