On Tue, May 18, 2021 at 01:42:04PM +0200, Vlastimil Babka wrote:

On 5/11/21 11:47 PM, Matthew Wilcox (Oracle) wrote:

quoted

Move wait_for_stable_page() into the folio compatibility file.
folio_wait_stable() avoids a call to compound_head() and is 14 bytes
smaller than wait_for_stable_page() was.  The net text size grows by 24
bytes as a result of this patch.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jeff Layton <jlayton@kernel.org>

Acked-by: Vlastimil Babka <redacted>

This seems to remove last user of thp_head(). Remove it as obsolete?

Good catch!  I'll squash that in.  We're down to just one user of
thp_order in my tree ...