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From 2dcd6492718c2921feac993aa71ed3a7c2522077 Mon Sep 17 00:00:00 2001
From: Jes Sorensen <jsorensen@fb.com>
Date: Thu, 31 May 2018 13:17:46 -0400
Subject: [PATCH 20/26] super0: Use memmove() when adjusting sparc2.2
superblock data
memcpy() does not allow overlapping copies, switch to memmove()
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
super0.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/super0.c b/super0.c
index 756cab5e..42989b9f 100644
--- a/super0.c
+++ b/super0.c
@@ -520,9 +520,10 @@ static int update_super0(struct supertype *st, struct mdinfo *info,
* up 4 bytes before continuing
*/
__u32 *sb32 = (__u32*)sb;
- memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
- sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
- (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
+
+ memmove(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
+ sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
+ (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
if (verbose >= 0)
pr_err("adjusting superblock of %s for 2.2/sparc compatibility.\n",
devname);
--
2.17.1
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