mdadm: fix gcc-8 format-truncation warning

While compiling with `-Werror=format-truncation=', it failed
[snip]
|super0.c:236:32: error: 'snprintf' output may be truncated
before the last format character [-Werror=format-truncation=]
|   snprintf(nb, sizeof(nb), "%4d", d);
|                                ^
|super0.c:236:3: note: 'snprintf' output between 5 and 12 bytes
into a destination of size 11
|   snprintf(nb, sizeof(nb), "%4d", d);
[snip]

(From OE-Core rev: cd5013a94609ef2f3e0d621339e22e4137d649d3)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/meta/recipes-extended/mdadm/files/0001-fix-gcc-8-format-truncation-warning.patch b/meta/recipes-extended/mdadm/files/0001-fix-gcc-8-format-truncation-warning.patch
new file mode 100644
index 0000000000..fa9c8cc835
--- /dev/null
+++ b/meta/recipes-extended/mdadm/files/0001-fix-gcc-8-format-truncation-warning.patch
@@ -0,0 +1,39 @@
+From 3158d3788c2e0fb75ace2c89840bd8a977fb4cb0 Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Fri, 14 Dec 2018 15:12:31 +0800
+Subject: [PATCH] fix gcc-8 format-truncation warning
+
+While compiling with `-Werror=format-truncation=', it failed
+[snip]
+|super0.c:236:32: error: 'snprintf' output may be truncated
+before the last format character [-Werror=format-truncation=]
+|   snprintf(nb, sizeof(nb), "%4d", d);
+|                                ^
+|super0.c:236:3: note: 'snprintf' output between 5 and 12 bytes
+into a destination of size 11
+|   snprintf(nb, sizeof(nb), "%4d", d);
+[snip]
+
+Upstream-Status: Submitted [https://github.com/neilbrown/mdadm/pull/34]
+
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ super0.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/super0.c b/super0.c
+index 756cab5..12c28da 100644
+--- a/super0.c
++++ b/super0.c
+@@ -229,7 +229,7 @@ static void examine_super0(struct supertype *st, char *homehost)
+             d++) {
+                mdp_disk_t *dp;
+                char *dv;
+-               char nb[11];
++               char nb[12];
+                int wonly, failfast;
+                if (d>=0) dp = &sb->disks[d];
+                else dp = &sb->this_disk;
+-- 
+2.7.4
+