From: Neil Horman <nhorman@tuxdriver.com>

It would be nice if the argv_split library function could gracefully handle
a NULL pointer in the argcp parameter, so as to allow functions using it
that did not care about the value of argc to not have to declare a useless
variable.  This patch accomplishes that.  Tested by me, with successful
results.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Satyam Sharma <satyam@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/argv_split.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletion(-)

diff -puN lib/argv_split.c~argv_split-allow-argv_split-to-handle-null-pointer-in-argcp-parameter-gracefully lib/argv_split.c
--- a/lib/argv_split.c~argv_split-allow-argv_split-to-handle-null-pointer-in-argcp-parameter-gracefully
+++ a/lib/argv_split.c
@@ -75,7 +75,9 @@ char **argv_split(gfp_t gfp, const char 
 	if (argv == NULL)
 		goto out;
 
-	*argcp = argc;
+	if (argcp)
+		*argcp = argc;
+
 	argvp = argv;
 
 	while (*str) {
_