I encounter one building error, such as:
In file included from /usr/include/string.h:494,
from mdadm.h:46,
from super0.c:26:
In function 'memcpy',
inlined from 'update_super0' at super0.c:523:3:
/usr/include/bits/string_fortified.h:34:10: error: '__builtin_memcpy' accessing 3936 bytes at offsets 156 and 160 overlaps 3932 bytes at offset 160 [-Werror=restrict]
return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This patch adds a temporary to fix this problem.
Signed-off-by: Xiao Ni <xni@xxxxxxxxxx>
---
super0.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/super0.c b/super0.c
index 756cab5..fd56cce 100644
--- a/super0.c
+++ b/super0.c
@@ -519,9 +519,11 @@ static int update_super0(struct supertype *st, struct mdinfo *info,
* So we copy the tail of the superblock
* up 4 bytes before continuing
*/
+ __u32 sbuf[(MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4];
__u32 *sb32 = (__u32*)sb;
- memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
- sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
+ memcpy(sbuf, sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
+ (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
+ memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, sbuf,
(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",
--
2.7.4
--
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