md: don't call md_allow_write in get_bitmap_file.

There is no really need as GFP_NOIO is very likely sufficient,
and failure is not catastrophic.

Calling md_allow_write here will convert a read-auto array to
read/write which could be confusing when you are just performing
a read operation.

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

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 9f13e13..bba8732 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5628,10 +5628,7 @@ static int get_bitmap_file(struct mddev * mddev, void __user * arg)
        char *ptr, *buf = NULL;
        int err = -ENOMEM;
 
-       if (md_allow_write(mddev))
-               file = kmalloc(sizeof(*file), GFP_NOIO);
-       else
-               file = kmalloc(sizeof(*file), GFP_KERNEL);
+       file = kmalloc(sizeof(*file), GFP_NOIO);
 
        if (!file)
                goto out;