Re: [PATCH] Turn do_sync_file_range() into do_sync_mapping_range()

[Christoph Hellwig <hch@infradead.org>]

On Tue, Mar 20, 2007 at 02:46:26PM -0700, Mark Fasheh wrote:
> do_sync_file_range() accepts a file * from which it takes an address_space
> to sync. Abstract out the bulk of the function into do_sync_mapping_range()
> which takes the address_space directly. This way callers who want to sync an
> address_space directly can take advantage of the functionality provided.
> 
> do_sync_file_range() is preserved as a 3 line wrapper around
> do_sync_mapping_range().
> 
> Ocfs2 in particular would like to use this to initiate a sync of a specific
> inode range during truncate, where a file * may not be available.

Looks good to me, but I agree with Andrew that we should simply
kill do_sync_file_range, espcially as at least one of the callers
has file->f_mapping guaranteed != NULL;