[PATCH] zonefs: use ZONEFS_SUPER_SIZE instead of PAGE_SIZE

[Johannes Thumshirn <jth@kernel.org>]

From: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Use ZONEFS_SUPER_SIZE constant instead of PAGE_SIZE allocating memory for
reading the super block in zonefs_read_super().

While PAGE_SIZE technically isn't incorrect as Linux doesn't support pages
smaller than 4k ZONEFS_SUPER_SIZE is semantically more correct.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

---
This patch is based on top of Christoph's series titled "add more bio
helper" specifically on top of "[PATCH 16/17] zonefs: use bdev_rw_virt in
zonefs_read_super"
---
 fs/zonefs/super.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index d165eb979f21..4dc7f967c861 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -1113,11 +1113,12 @@ static int zonefs_read_super(struct super_block *sb)
 	u32 crc, stored_crc;
 	int ret;
 
-	super = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	super = kmalloc(ZONEFS_SUPER_SIZE, GFP_KERNEL);
 	if (!super)
 		return -ENOMEM;
 
-	ret = bdev_rw_virt(sb->s_bdev, 0, super, PAGE_SIZE, REQ_OP_READ);
+	ret = bdev_rw_virt(sb->s_bdev, 0, super, ZONEFS_SUPER_SIZE,
+			   REQ_OP_READ);
 	if (ret)
 		goto free_super;
 
-- 
2.43.0