This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
CIFS should probably be converted to use netfs_read_folio() by someone
familiar with it.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This function mostly used folios already, and only a few minor changes
were needed.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is a full folio conversion; it is prepared to handle folios of
arbitrary size.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

mpage_readpage still works in terms of pages, and has not been audited
for correctness with large folios, so include an assertion that the
filesystem is not passing it large folios.  Convert all the filesystems
to call mpage_read_folio() instead of mpage_readpage().
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This function is NOT converted to handle large folios, so include
an assert that the filesystem isn't passing one in.  Otherwise, use
the folio functions instead of the page functions, where they exist.
Convert all filesystems which use block_read_full_page().
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

A straightforward conversion as iomap_readpage already worked in folios.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

This is straightforward because netfs already worked in terms of folios.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

Convert all the ->readpage documentation to ->read_folio.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

Change all the callers of ->readpage to call ->read_folio in preference,
if it exists.  This is a transitional duplication, and will be removed
by the end of the series.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

 - Calculate iblock directly instead of using a while loop
 - Move has_buffers to the end to remove a backwards jump
 - Use __filemap_get_folio() instead of grab_cache_page(), which
   removes a spurious FGP_ACCESSED flag.
 - Eliminate length and pos variables
 - Use folio APIs where they exist
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

Removes a couple of calls to compound_head and saves a few bytes.
Also convert verity's read_file_data_page() to be folio-based.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

Pass a folio instead of a page to aops->is_dirty_writeback().
Convert both implementations and the caller.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

Handle multi-page folios correctly and removes a few calls to
compound_head().
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

The previous comment was not terribly helpful.  Be a bit more explicit
about the necessary locking environment.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

Add kernel-doc for several functions relating to take the folio lock.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>

We no longer need the page's inode pinned.  This comment dates back to
commit db37648c ("[PATCH] mm: non syncing lock_page()") which added
lock_page_nosync().  That was removed by commit 7eaceacc ("block:
remove per-queue plugging") which also made this comment obsolete.
Signed-off-by: NMiaohe Lin <linmiaohe@huawei.com>
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

These wrappers have no more users; remove them.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

pagecache_write_begin() and pagecache_write_end() are now trivial
wrappers, so call the aops directly.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

pagecache_write_begin() and pagecache_write_end() are now trivial
wrappers, so call the aops directly.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

pagecache_write_begin() and pagecache_write_end() are now trivial
wrappers, so call the aops directly.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>

There is only one kind of write_begin/write_end aops, so we don't need
to look up which aop it is, just make hfsplus_write_begin() available to
this file and call it directly.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>