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-rw-r--r--fs/btrfs/super.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 5c23eb8d6ba3..5f56213908e7 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -68,7 +68,7 @@ enum {
Opt_nodatacow, Opt_max_inline, Opt_alloc_start, Opt_nobarrier, Opt_ssd,
Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress,
Opt_compress_force, Opt_notreelog, Opt_ratio, Opt_flushoncommit,
- Opt_discard, Opt_space_cache, Opt_err,
+ Opt_discard, Opt_space_cache, Opt_clear_cache, Opt_err,
};
static match_table_t tokens = {
@@ -93,6 +93,7 @@ static match_table_t tokens = {
{Opt_ratio, "metadata_ratio=%d"},
{Opt_discard, "discard"},
{Opt_space_cache, "space_cache"},
+ {Opt_clear_cache, "clear_cache"},
{Opt_err, NULL},
};
@@ -239,6 +240,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
case Opt_space_cache:
printk(KERN_INFO "btrfs: enabling disk space caching\n");
btrfs_set_opt(info->mount_opt, SPACE_CACHE);
+ case Opt_clear_cache:
+ printk(KERN_INFO "btrfs: force clearing of disk cache\n");
+ btrfs_set_opt(info->mount_opt, CLEAR_CACHE);
break;
case Opt_err:
printk(KERN_INFO "btrfs: unrecognized mount option "