linux-kernel - [PATCH 1/3] f2fs: call flush_dcache

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Date:	Wed, 19 Nov 2014 14:35:08 -0800
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc:	Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 1/3] f2fs: call flush_dcache_page when the page was updated

Whenever f2fs updates mapped pages, it needs to call flush_dcache_page.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/dir.c    | 7 ++++++-
 fs/f2fs/inline.c | 4 +++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 5a49995..312fbfc 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -287,8 +287,10 @@ void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
 	f2fs_wait_on_page_writeback(page, type);
 	de->ino = cpu_to_le32(inode->i_ino);
 	set_de_type(de, inode);
-	if (!f2fs_has_inline_dentry(dir))
+	if (!f2fs_has_inline_dentry(dir)) {
 		kunmap(page);
+		flush_dcache_page(page);
+	}
 	set_page_dirty(page);
 	dir->i_mtime = dir->i_ctime = CURRENT_TIME;
 	mark_inode_dirty(dir);
@@ -366,6 +368,7 @@ static int make_empty_dir(struct inode *inode,
 	do_make_empty_dir(inode, parent, &d);
 
 	kunmap_atomic(dentry_blk);
+	flush_dcache_page(dentry_page);
 
 	set_page_dirty(dentry_page);
 	f2fs_put_page(dentry_page, 1);
@@ -579,6 +582,7 @@ fail:
 		clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
 	}
 	kunmap(dentry_page);
+	flush_dcache_page(dentry_page);
 	f2fs_put_page(dentry_page, 1);
 	return err;
 }
@@ -661,6 +665,7 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
 			NR_DENTRY_IN_BLOCK,
 			0);
 	kunmap(page); /* kunmap - pair of f2fs_find_entry */
+	flush_dcache_page(page);
 	set_page_dirty(page);
 
 	dir->i_ctime = dir->i_mtime = CURRENT_TIME;
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index f26fb87..8b7cc51 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -45,8 +45,8 @@ void read_inline_data(struct page *page, struct page *ipage)
 	src_addr = inline_data_addr(ipage);
 	dst_addr = kmap_atomic(page);
 	memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
-	flush_dcache_page(page);
 	kunmap_atomic(dst_addr);
+	flush_dcache_page(page);
 	SetPageUptodate(page);
 }
 
@@ -107,6 +107,7 @@ int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 	dst_addr = kmap_atomic(page);
 	memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
 	kunmap_atomic(dst_addr);
+	flush_dcache_page(page);
 	SetPageUptodate(page);
 no_update:
 	/* write data page to try to make data consistent */
@@ -358,6 +359,7 @@ static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 					NR_INLINE_DENTRY * F2FS_SLOT_LEN);
 
 	kunmap_atomic(dentry_blk);
+	flush_dcache_page(page);
 	SetPageUptodate(page);
 	set_page_dirty(page);
 
-- 
2.1.1

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