From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Mon, 27 Oct 2014 18:04:35 +0000 (-0700)
Subject: f2fs: call write_checkpoint under disabled gc
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=ca4b02eeed752c02da0df9da6f9d3c978f9fa9e1;p=deliverable%2Flinux.git

f2fs: call write_checkpoint under disabled gc

During the write_checkpoint, we should avoid f2fs_gc trigger to avoid any
filesystem consistency.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 21ccc4816474..d391a5913c79 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1046,7 +1046,9 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
 	cpc.trim_minlen = range->minlen >> sbi->log_blocksize;
 
 	/* do checkpoint to issue discard commands safely */
+	mutex_lock(&sbi->gc_mutex);
 	write_checkpoint(sbi, &cpc);
+	mutex_unlock(&sbi->gc_mutex);
 out:
 	range->len = cpc.trimmed << sbi->log_blocksize;
 	return 0;