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author | Jan Kara <jack@suse.cz> | 2009-08-17 19:30:27 +0200 |
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committer | Jan Kara <jack@suse.cz> | 2009-09-14 17:08:14 +0200 |
commit | d3bccb6f4b886060aa0f58976b92b77d951f5434 (patch) | |
tree | b5f9eb43890da173a078e883d51c23b8c27ceaa6 /mm/filemap.c | |
parent | Merge git://git.linux-nfs.org/projects/trondmy/nfs-2.6 (diff) | |
download | linux-d3bccb6f4b886060aa0f58976b92b77d951f5434.tar.xz linux-d3bccb6f4b886060aa0f58976b92b77d951f5434.zip |
vfs: Introduce filemap_fdatawait_range
This simple helper saves some filesystems conversion from byte offset
to page numbers and also makes the fdata* interface more complete.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to '')
-rw-r--r-- | mm/filemap.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index ccea3b665c12..65b2e50efcd0 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -307,6 +307,26 @@ int wait_on_page_writeback_range(struct address_space *mapping, } /** + * filemap_fdatawait_range - wait for all under-writeback pages to complete in a given range + * @mapping: address space structure to wait for + * @start: offset in bytes where the range starts + * @end: offset in bytes where the range ends (inclusive) + * + * Walk the list of under-writeback pages of the given address space + * in the given range and wait for all of them. + * + * This is just a simple wrapper so that callers don't have to convert offsets + * to page indexes themselves + */ +int filemap_fdatawait_range(struct address_space *mapping, loff_t start, + loff_t end) +{ + return wait_on_page_writeback_range(mapping, start >> PAGE_CACHE_SHIFT, + end >> PAGE_CACHE_SHIFT); +} +EXPORT_SYMBOL(filemap_fdatawait_range); + +/** * sync_page_range - write and wait on all pages in the passed range * @inode: target inode * @mapping: target address_space |