[patch 01/11] fs: Make unload_nls() NULL pointer safe

[Thomas Gleixner <tglx@linutronix.de>]

[-- Attachment #1: fs-make-unload-nls-null-pointer-safe.patch --]
[-- Type: text/plain, Size: 706 bytes --]

Most callsites of unload_nls() do 
     if (nls)
	   unload_nls(nls);

Check the pointer inside unload_nls() like we do in kfree() so we can
simplify the call sites.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 fs/nls/nls_base.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6-tip/fs/nls/nls_base.c
===================================================================
--- linux-2.6-tip.orig/fs/nls/nls_base.c
+++ linux-2.6-tip/fs/nls/nls_base.c
@@ -270,7 +270,8 @@ struct nls_table *load_nls(char *charset
 
 void unload_nls(struct nls_table *nls)
 {
-	module_put(nls->owner);
+	if (nls)
+		module_put(nls->owner);
 }
 
 static const wchar_t charset2uni[256] = {