[PATCH 2/8] reiserfs: use kmap_local_folio() in _get_block_create_0()

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

Switch from the deprecated kmap() to kmap_local_folio().  For the
kunmap_local(), I subtract off 'chars' to prevent the possibility that
p has wrapped into the next page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/reiserfs/inode.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 41c0a785e9ab..0ca2d439510a 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -390,8 +390,7 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
 	 * sure we need to.  But, this means the item might move if
 	 * kmap schedules
 	 */
-	p = (char *)kmap(bh_result->b_page);
-	p += offset;
+	p = kmap_local_folio(bh_result->b_folio, offset);
 	memset(p, 0, inode->i_sb->s_blocksize);
 	do {
 		if (!is_direct_le_ih(ih)) {
@@ -439,8 +438,8 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
 		ih = tp_item_head(&path);
 	} while (1);
 
-	flush_dcache_page(bh_result->b_page);
-	kunmap(bh_result->b_page);
+	flush_dcache_folio(bh_result->b_folio);
+	kunmap_local(p - chars);
 
 finished:
 	pathrelse(&path);
-- 
2.35.1