commit 0448027b765ec7ede580a1630c23fe7cf4bd0b05

Author: Justin Maggard <jmaggard10@gmail.com>

Date:   Fri Oct 24 17:55:02 2014 -0700

    Grow: fix resize of array component size to > 32bits

    If the request --size to --grow an array to is larger

    than 32bits, then mdadm may make the wrong choice and

    use ioctl instead of setting component_size via sysfs

    and the change is ignored.

    Instead of using casts to check for a 32-bit overflow,

    just check for set bits outside of INT32_MAX.

    Fixes: 4e9a3dd16d656b269f5602624ac4f7109a571368

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

diff --git a/Grow.c b/Grow.c

index 76bb35a..a0f7526 100644

--- a/Grow.c

+++ b/Grow.c

@@ -1818,7 +1818,7 @@ int Grow_reshape(char *devname, int fd,

 		if (s->size == MAX_SIZE)

 			s->size = 0;

 		array.size = s->size;

-		if (array.size != (signed)s->size) {

+		if (s->size & ~INT32_MAX) {

 			/* got truncated to 32bit, write to

 			 * component_size instead

 			 */