1 files changed, 14 insertions, 39 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e9991adc0960..f6ab6f5e635a 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4475,46 +4475,18 @@ int btrfs_dirty_inode(struct inode *inode)
  * This is a copy of file_update_time.  We need this so we can return error on
  * ENOSPC for updating the inode in the case of file write and mmap writes.
  */
-int btrfs_update_time(struct file *file)
+static int btrfs_update_time(struct inode *inode, struct timespec *now,
+                             int flags)
 {
-        struct inode *inode = file->f_path.dentry->d_inode;
-        struct timespec now;
-        int ret;
-        enum { S_MTIME = 1, S_CTIME = 2, S_VERSION = 4 } sync_it = 0;
-
-        /* First try to exhaust all avenues to not sync */
-        if (IS_NOCMTIME(inode))
-                return 0;
-
-        now = current_fs_time(inode->i_sb);
-        if (!timespec_equal(&inode->i_mtime, &now))
-                sync_it = S_MTIME;
-
-        if (!timespec_equal(&inode->i_ctime, &now))
-                sync_it |= S_CTIME;
-
-        if (IS_I_VERSION(inode))
-                sync_it |= S_VERSION;
-
-        if (!sync_it)
-                return 0;
-
-        /* Finally allowed to write? Takes lock. */
-        if (mnt_want_write_file(file))
-                return 0;
-
-        /* Only change inode inside the lock region */
-        if (sync_it & S_VERSION)
+        if (flags & S_VERSION)
                 inode_inc_iversion(inode);
-        if (sync_it & S_CTIME)
-                inode->i_ctime = now;
-        if (sync_it & S_MTIME)
-                inode->i_mtime = now;
-        ret = btrfs_dirty_inode(inode);
-        if (!ret)
-                mark_inode_dirty_sync(inode);
-        mnt_drop_write(file->f_path.mnt);
-        return ret;
+        if (flags & S_CTIME)
+                inode->i_ctime = *now;
+        if (flags & S_MTIME)
+                inode->i_mtime = *now;
+        if (flags & S_ATIME)
+                inode->i_atime = *now;
+        return btrfs_dirty_inode(inode);
 }
 
 /*
@@ -6565,7 +6537,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 
         ret  = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE);
         if (!ret) {
-                ret = btrfs_update_time(vma->vm_file);
+                ret = file_update_time(vma->vm_file);
                 reserved = 1;
         }
         if (ret) {
@@ -7635,6 +7607,7 @@ static const struct inode_operations btrfs_file_inode_operations = {
         .permission     = btrfs_permission,
         .fiemap         = btrfs_fiemap,
         .get_acl        = btrfs_get_acl,
+        .update_time    = btrfs_update_time,
 };
 static const struct inode_operations btrfs_special_inode_operations = {
         .getattr        = btrfs_getattr,
@@ -7645,6 +7618,7 @@ static const struct inode_operations btrfs_special_inode_operations = {
         .listxattr      = btrfs_listxattr,
         .removexattr    = btrfs_removexattr,
         .get_acl        = btrfs_get_acl,
+        .update_time    = btrfs_update_time,
 };
 static const struct inode_operations btrfs_symlink_inode_operations = {
         .readlink       = generic_readlink,
@@ -7658,6 +7632,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
         .listxattr      = btrfs_listxattr,
         .removexattr    = btrfs_removexattr,
         .get_acl        = btrfs_get_acl,
+        .update_time    = btrfs_update_time,
 };
 
 const struct dentry_operations btrfs_dentry_operations = {