CacheFiles: Catch an overly long wait for an old active object

[karo-tx-linux.git] / fs / btrfs / super.c

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6d6d06cb6dfce1e0bf950ca6d0175e9993f53010..752a5463bf53aee147068c2a0a9f678e12250f38 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -51,7 +51,7 @@
 #include "export.h"
 #include "compression.h"
 
-static struct super_operations btrfs_super_ops;
+static const struct super_operations btrfs_super_ops;
 
 static void btrfs_put_super(struct super_block *sb)
 {
@@ -66,7 +66,8 @@ enum {
        Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow,
        Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier,
        Opt_ssd, Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl,
-       Opt_compress, Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_err,
+       Opt_compress, Opt_notreelog, Opt_ratio, Opt_flushoncommit,
+       Opt_discard, Opt_err,
 };
 
 static match_table_t tokens = {
@@ -88,6 +89,7 @@ static match_table_t tokens = {
        {Opt_notreelog, "notreelog"},
        {Opt_flushoncommit, "flushoncommit"},
        {Opt_ratio, "metadata_ratio=%d"},
+       {Opt_discard, "discard"},
        {Opt_err, NULL},
 };
 
@@ -257,6 +259,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
                                       info->metadata_ratio);
                        }
                        break;
+               case Opt_discard:
+                       btrfs_set_opt(info->mount_opt, DISCARD);
+                       break;
                default:
                        break;
                }
@@ -344,7 +349,9 @@ static int btrfs_fill_super(struct super_block *sb,
        sb->s_export_op = &btrfs_export_ops;
        sb->s_xattr = btrfs_xattr_handlers;
        sb->s_time_gran = 1;
+#ifdef CONFIG_BTRFS_FS_POSIX_ACL
        sb->s_flags |= MS_POSIXACL;
+#endif
 
        tree_root = open_ctree(sb, fs_devices, (char *)data);
 
@@ -675,7 +682,8 @@ static int btrfs_unfreeze(struct super_block *sb)
        return 0;
 }
 
-static struct super_operations btrfs_super_ops = {
+static const struct super_operations btrfs_super_ops = {
+       .drop_inode     = btrfs_drop_inode,
        .delete_inode   = btrfs_delete_inode,
        .put_super      = btrfs_put_super,
        .sync_fs        = btrfs_sync_fs,