From: Jérôme Glisse <[email protected]> This patch remove most dereference of page->mapping and get the mapping from the call context (either already available in the function or by adding it to function arguments).
Signed-off-by: Jérôme Glisse <[email protected]> Cc: Jens Axboe <[email protected]> CC: Andrew Morton <[email protected]> Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: Tejun Heo <[email protected]> Cc: Jan Kara <[email protected]> Cc: Josef Bacik <[email protected]> Cc: Mel Gorman <[email protected]> --- fs/block_dev.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 502b6643bc74..dd9da97615e3 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -564,14 +564,14 @@ EXPORT_SYMBOL(thaw_bdev); static int blkdev_writepage(struct address_space *mapping, struct page *page, struct writeback_control *wbc) { - return block_write_full_page(page->mapping->host, page, + return block_write_full_page(mapping->host, page, blkdev_get_block, wbc); } static int blkdev_readpage(struct file * file, struct address_space *mapping, struct page * page) { - return block_read_full_page(page->mapping->host,page,blkdev_get_block); + return block_read_full_page(mapping->host,page,blkdev_get_block); } static int blkdev_readpages(struct file *file, struct address_space *mapping, @@ -1941,7 +1941,7 @@ EXPORT_SYMBOL_GPL(blkdev_read_iter); static int blkdev_releasepage(struct address_space *mapping, struct page *page, gfp_t wait) { - struct super_block *super = BDEV_I(page->mapping->host)->bdev.bd_super; + struct super_block *super = BDEV_I(mapping->host)->bdev.bd_super; if (super && super->s_op->bdev_try_to_free_page) return super->s_op->bdev_try_to_free_page(super, page, wait); -- 2.14.3
