linux-kernel - [PATCH 4/5] f2fs: introduce f2fs_issue

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Date:	Fri, 15 Nov 2013 14:20:23 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Jaegeuk Kim <jaegeuk.kim@...sung.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: [PATCH 4/5] f2fs: introduce f2fs_issue_discard() to clean up

This patch adds f2fs_issue_discard() to clean up blkdev_issue_discard() flows.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
---
 fs/f2fs/segment.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 505a889..d021cf3 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -266,6 +266,16 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
 	mutex_unlock(&dirty_i->seglist_lock);
 }
 
+static void f2fs_issue_discard(struct f2fs_sb_info *sbi,
+				block_t blkstart, block_t blklen)
+{
+	sector_t sector_addr = blkstart << sbi->log_sectors_per_block;
+	sector_t sector_len = blklen << sbi->log_sectors_per_block;
+
+	blkdev_issue_discard(sbi->sb->s_bdev, sector_addr, sector_len,
+							GFP_NOFS, 0);
+}
+
 static void add_discard_addrs(struct f2fs_sb_info *sbi,
 			unsigned int segno, struct seg_entry *se)
 {
@@ -354,22 +364,15 @@ void clear_prefree_segments(struct f2fs_sb_info *sbi)
 		if (!test_opt(sbi, DISCARD))
 			continue;
 
-		blkdev_issue_discard(sbi->sb->s_bdev,
-				START_BLOCK(sbi, start) <<
-				sbi->log_sectors_per_block,
-				(1 << (sbi->log_sectors_per_block +
-				sbi->log_blocks_per_seg)) * (end - start),
-				GFP_NOFS, 0);
+		f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
+				(end - start) << sbi->log_blocks_per_seg);
 	}
 	mutex_unlock(&dirty_i->seglist_lock);
 
 	/* send small discards */
 	list_for_each_safe(this, next, head) {
 		entry = list_entry(this, struct discard_entry, list);
-		blkdev_issue_discard(sbi->sb->s_bdev,
-				entry->blkaddr << sbi->log_sectors_per_block,
-				(1 << sbi->log_sectors_per_block) * entry->len,
-				GFP_NOFS, 0);
+		f2fs_issue_discard(sbi, entry->blkaddr, entry->len);
 		list_del(&entry->list);
 		SM_I(sbi)->nr_discards -= entry->len;
 		kmem_cache_free(discard_entry_slab, entry);
-- 
1.8.4.474.g128a96c

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