From: Andre Noll <maan@systemlinux.org>
Date: Tue, 26 Apr 2011 14:33:44 +0000 (+0200)
Subject: fd: Allow passing NULL to para_munmap().
X-Git-Tag: v0.4.7~13
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=8acdfc3d6d124581d0b624e61e0047f576eb4748

fd: Allow passing NULL to para_munmap().

This patch makes para_munmap succeed with return value 0 if the passed
"start" pointer is NULL. This allows to simplify the code in the
callers a bit, similar to free(NULL).
---

diff --git a/fd.c b/fd.c
index 6f9266f4..ea16bdda 100644
--- a/fd.c
+++ b/fd.c
@@ -563,6 +563,9 @@ out:
 int para_munmap(void *start, size_t length)
 {
 	int err;
+
+	if (!start)
+		return 0;
 	if (munmap(start, length) >= 0)
 		return 1;
 	err = errno;