mdadm: fix CFLAGS and ptest issues

* Pass global CFLAGS to build:

The CFLAGS does not pass to build at all since it was redefined by
mdadm Makefile:

  CFLAGS = $(CWFLAGS) $(CXFLAGS) ...

This could be done by setting 'CXFLAGS="${CFLAGS}"'.

* Also fix ptest build errors caused by global CFLAGS:

  raid6check.c:352:2: error: ignoring return value of posix_memalign, \
  declared with attribute warn_unused_result [-Werror=unused-result]

  raid6check.c:315:8: error: 'stripe_buf' may be used uninitialized \
  in this function [-Werror=maybe-uninitialized]

(From OE-Core rev: 60f71fa4da86ca4c7c37115c343db194a3b7b47b)

Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/meta/recipes-extended/mdadm/files/mdadm-fix-ptest-build-errors.patch b/meta/recipes-extended/mdadm/files/mdadm-fix-ptest-build-errors.patch
new file mode 100644
index 0000000000..f7c55142f6
--- /dev/null
+++ b/meta/recipes-extended/mdadm/files/mdadm-fix-ptest-build-errors.patch
@@ -0,0 +1,50 @@
+From f3acf8499a4cc400206c5c56f0a6c69192ed55de Mon Sep 17 00:00:00 2001
+From: Wenzong Fan <wenzong.fan@windriver.com>
+Date: Sat, 7 Nov 2015 04:21:17 -0500
+Subject: [PATCH] mdadm: fix ptest build errors
+
+Check return value for posix_memalign() to fix ptest build error:
+
+  raid6check.c:352:2: error: ignoring return value of posix_memalign, \
+  declared with attribute warn_unused_result [-Werror=unused-result]
+
+Initialize *stripe_buf as NULL to fix ptest build error:
+
+  raid6check.c: In function 'check_stripes':
+  raid6check.c:315:8: error: 'stripe_buf' may be used uninitialized \
+  in this function [-Werror=maybe-uninitialized]
+
+Upstream-Status: Pending
+
+Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
+---
+ raid6check.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/raid6check.c b/raid6check.c
+index cb8522e..9462bcf 100644
+--- a/raid6check.c
++++ b/raid6check.c
+@@ -312,7 +312,7 @@ int check_stripes(struct mdinfo *info, int *source, unsigned long long *offsets,
+        /* read the data and p and q blocks, and check we got them right */
+        int data_disks = raid_disks - 2;
+        int syndrome_disks = data_disks + is_ddf(layout) * 2;
+-       char *stripe_buf;
++       char *stripe_buf = NULL;
+ 
+        /* stripes[] is indexed by raid_disk and holds chunks from each device */
+        char **stripes = xmalloc(raid_disks * sizeof(char*));
+@@ -349,7 +349,9 @@ int check_stripes(struct mdinfo *info, int *source, unsigned long long *offsets,
+        if (!tables_ready)
+                make_tables();
+ 
+-       posix_memalign((void**)&stripe_buf, 4096, raid_disks * chunk_size);
++       if (posix_memalign((void**)&stripe_buf, 4096, raid_disks * chunk_size) != 0)
++               goto exitCheck;
++
+        block_index_for_slot += 2;
+        blocks += 2;
+        blocks_page += 2;
+-- 
+1.9.1
+