From: NeilBrown <neilb@suse.de>
Date: Fri, 23 Dec 2011 03:09:56 +0000 (+1100)
Subject: super1: use awrite when writing a new bitmap.
X-Git-Tag: mdadm-3.2.3~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b6db6fab11aedf2f04831d777e68a557b6d1f450;p=thirdparty%2Fmdadm.git

super1: use awrite when writing a new bitmap.

This ensures it will succeed on 4K block devices like DASD.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/super1.c b/super1.c
index b4309734..3582f0c8 100644
--- a/super1.c
+++ b/super1.c
@@ -1631,7 +1631,7 @@ static int write_bitmap1(struct supertype *st, int fd)
 	int rv = 0;
 
 	int towrite, n;
-	char *buf = (char*)(((long)(abuf+4096))&~4095UL);
+	char buf[4096];
 
 	locate_bitmap1(st, fd);
 
@@ -1646,7 +1646,7 @@ static int write_bitmap1(struct supertype *st, int fd)
 		n = towrite;
 		if (n > 4096)
 			n = 4096;
-		n = write(fd, buf, n);
+		n = awrite(fd, buf, n);
 		if (n > 0)
 			towrite -= n;
 		else