Manage: check alignment when stopping an array undergoing reshape.

To be able to revert-reshape of raid4/5/6 which is changing
the number of devices, the reshape must has been stopped on a multiple
of the old and new stripe sizes.

The kernel only enforces the new stripe size multiple.

So we enforce the old-stripe-size multiple by careful use of
"sync_max" and monitoring "reshape_position".

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

1 files changed, 0 insertions, 11 deletions

diff --git a/Grow.c b/Grow.c
index 0e20b240..e27d29ff 100644
--- a/Grow.c
+++ b/Grow.c
@@ -929,17 +929,6 @@ int reshape_open_backup_file(char *backup_file,
 	return 1;
 }
 
-unsigned long GCD(unsigned long a, unsigned long b)
-{
-	while (a != b) {
-		if (a < b)
-			b -= a;
-		if (b < a)
-			a -= b;
-	}
-	return a;
-}
-
 unsigned long compute_backup_blocks(int nchunk, int ochunk,
 				    unsigned int ndata, unsigned int odata)
 {