From: Chao Yu <chao2.yu@samsung.com>
Date: Tue, 1 Dec 2015 03:47:33 +0000 (+0800)
Subject: f2fs: kill f2fs_drop_largest_extent
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=9006f2c93fe5cc450bc0d3a4924b46393f165b4a;p=openwrt%2Fstaging%2Fblogic.git

f2fs: kill f2fs_drop_largest_extent

For direct IO, f2fs only allocate new address for the block which is not
exist in the disk before, its mapping info should not exist in extent
cache previously, so here we do not need to call f2fs_drop_largest_extent
to drop related cache.

Due to no more callers for f2fs_drop_largest_extent now, kill it.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 6c689e9a86a3..90a2ffea875b 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -494,10 +494,6 @@ alloc:
 	if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT))
 		i_size_write(dn->inode,
 				((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT));
-
-	/* direct IO doesn't use extent cache to maximize the performance */
-	f2fs_drop_largest_extent(dn->inode, fofs);
-
 	return 0;
 }
 
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index de063f2b2384..e86e9f1e0733 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -164,14 +164,6 @@ static void __drop_largest_extent(struct inode *inode,
 		largest->len = 0;
 }
 
-void f2fs_drop_largest_extent(struct inode *inode, pgoff_t fofs)
-{
-	if (!f2fs_may_extent_tree(inode))
-		return;
-
-	__drop_largest_extent(inode, fofs, 1);
-}
-
 void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 904384427ca6..0831db2f4b3a 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2078,7 +2078,6 @@ void f2fs_leave_shrinker(struct f2fs_sb_info *);
  * extent_cache.c
  */
 unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *, int);
-void f2fs_drop_largest_extent(struct inode *, pgoff_t);
 void f2fs_init_extent_tree(struct inode *, struct f2fs_extent *);
 unsigned int f2fs_destroy_extent_node(struct inode *);
 void f2fs_destroy_extent_tree(struct inode *);