nilfs2: Convert to new freezing mechanism

We change nilfs_page_mkwrite() to provide proper freeze protection for
writeable page faults (we must wait for frozen filesystem even if the
page is fully mapped).

We remove all vfs_check_frozen() checks since they are now handled by
the generic code.

CC: linux-nilfs@vger.kernel.org
CC: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 88e11fb346b6..a5752a589932 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -189,7 +189,7 @@ int nilfs_transaction_begin(struct super_block *sb,
         if (ret > 0)
                 return 0;
 
-        vfs_check_frozen(sb, SB_FREEZE_WRITE);
+        sb_start_intwrite(sb);
 
         nilfs = sb->s_fs_info;
         down_read(&nilfs->ns_segctor_sem);
@@ -205,6 +205,7 @@ int nilfs_transaction_begin(struct super_block *sb,
         current->journal_info = ti->ti_save;
         if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC)
                 kmem_cache_free(nilfs_transaction_cachep, ti);
+        sb_end_intwrite(sb);
         return ret;
 }
 
@@ -246,6 +247,7 @@ int nilfs_transaction_commit(struct super_block *sb)
                 err = nilfs_construct_segment(sb);
         if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC)
                 kmem_cache_free(nilfs_transaction_cachep, ti);
+        sb_end_intwrite(sb);
         return err;
 }
 
@@ -264,6 +266,7 @@ void nilfs_transaction_abort(struct super_block *sb)
         current->journal_info = ti->ti_save;
         if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC)
                 kmem_cache_free(nilfs_transaction_cachep, ti);
+        sb_end_intwrite(sb);
 }
 
 void nilfs_relax_pressure_in_lock(struct super_block *sb)