From: Shaohua Li <shli@fb.com>
Date: Tue, 17 Oct 2017 02:03:44 +0000 (-0700)
Subject: md/bitmap: revert a patch
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a6ff2fb417898b57e5f81349731855763260b266;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

md/bitmap: revert a patch

commit 938b533d479e7428b7fa1b8179283646d2e2c53d upstream.

This reverts commit 8031c3ddc70a. That patches doesn't work well if PAGE_SIZE >
4k. We will fix the original problem with a different approach.

Fix: 8031c3ddc70a(md/bitmap: copy correct data for bitmap super)
Reported-by: Joshua Kinard <kumba@gentoo.org>
Suggested-by: Neil Brown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index d2121637b4ab..cae57b5be817 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -625,7 +625,7 @@ re_read:
 		err = read_sb_page(bitmap->mddev,
 				   offset,
 				   sb_page,
-				   0, PAGE_SIZE);
+				   0, sizeof(bitmap_super_t));
 	}
 	if (err)
 		return err;
@@ -2123,7 +2123,7 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 	if (store.sb_page && bitmap->storage.sb_page)
 		memcpy(page_address(store.sb_page),
 		       page_address(bitmap->storage.sb_page),
-		       PAGE_SIZE);
+		       sizeof(bitmap_super_t));
 	bitmap_file_unmap(&bitmap->storage);
 	bitmap->storage = store;