From: "Matthew Wilcox (Oracle)" <[email protected]> Mostly this is just checking the page size of each page instead of assuming PAGE_SIZE. Clean up the logic in writepage a little.
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]> --- fs/xfs/xfs_aops.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 102cfd8a97d6..1a26e9ca626b 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -765,7 +765,7 @@ xfs_add_to_ioend( struct xfs_mount *mp = ip->i_mount; struct block_device *bdev = xfs_find_bdev_for_inode(inode); unsigned len = i_blocksize(inode); - unsigned poff = offset & (PAGE_SIZE - 1); + unsigned poff = offset & (page_size(page) - 1); bool merged, same_page = false; sector_t sector; @@ -843,7 +843,7 @@ xfs_aops_discard_page( if (error && !XFS_FORCED_SHUTDOWN(mp)) xfs_alert(mp, "page discard unable to remove delalloc mapping."); out_invalidate: - xfs_vm_invalidatepage(page, 0, PAGE_SIZE); + xfs_vm_invalidatepage(page, 0, page_size(page)); } /* @@ -984,8 +984,7 @@ xfs_do_writepage( struct xfs_writepage_ctx *wpc = data; struct inode *inode = page->mapping->host; loff_t offset; - uint64_t end_offset; - pgoff_t end_index; + uint64_t end_offset; trace_xfs_writepage(inode, page, 0, 0); @@ -1024,10 +1023,9 @@ xfs_do_writepage( * ---------------------------------^------------------| */ offset = i_size_read(inode); - end_index = offset >> PAGE_SHIFT; - if (page->index < end_index) - end_offset = (xfs_off_t)(page->index + 1) << PAGE_SHIFT; - else { + end_offset = file_offset_of_next_page(page); + + if (end_offset > offset) { /* * Check whether the page to write out is beyond or straddles * i_size or not. @@ -1039,7 +1037,8 @@ xfs_do_writepage( * | | Straddles | * ---------------------------------^-----------|--------| */ - unsigned offset_into_page = offset & (PAGE_SIZE - 1); + unsigned offset_into_page = offset_in_this_page(page, offset); + pgoff_t end_index = offset >> PAGE_SHIFT; /* * Skip the page if it is fully outside i_size, e.g. due to a @@ -1070,7 +1069,7 @@ xfs_do_writepage( * memory is zeroed when mapped, and writes to that region are * not written out to the file." */ - zero_user_segment(page, offset_into_page, PAGE_SIZE); + zero_user_segment(page, offset_into_page, page_size(page)); /* Adjust the end_offset to the end of file */ end_offset = offset; -- 2.23.0
