Grow: make sure bsb2 is properly aligned

We do O_DIRECT io in bsb2, so it must be aligned
properly.  Easiest if it is static.

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

diff --git a/Grow.c b/Grow.c
index 5ebb482e02fbb5c842512d98f390ad4247cbeb8c..e3239d64585df22a1f621e365839a4911974a4e5 100644 (file)
--- a/Grow.c
+++ b/Grow.c
@@ -387,7 +387,7 @@ int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int
  * It has the following structure.
  */
 
-struct mdp_backup_super {
+static struct mdp_backup_super {
        char    magic[16];  /* md_backup_data-1 or -2 */
        __u8    set_uuid[16];
        __u64   mtime;
@@ -402,7 +402,7 @@ struct mdp_backup_super {
        __u64   length2;
        __u32   sb_csum2;       /* csum of preceeding bytes. */
        __u8 pad[512-68-32];
-} __attribute__((aligned(512))) bsb;
+} __attribute__((aligned(512))) bsb, bsb2;
 
 int bsb_csum(char *buf, int len)
 {
@@ -1331,7 +1331,6 @@ static void validate(int afd, int bfd, unsigned long long offset)
         * This is only used for regression testing and should not
         * be used while the array is active
         */
-       struct mdp_backup_super bsb2;
        if (afd < 0)
                return;
        lseek64(bfd, offset - 4096, 0);