linux-stable.git/include/linux/rmap.h, branch v5.18.18

mm: rmap: use the correct parameter name for DEFINE_PAGE_VMA_WALK

2022-08-17T12:41:42+00:00

[ Upstream commit 507db7927cd181d409dd495c8384b8e14c21c600 ]

The parameter used by DEFINE_PAGE_VMA_WALK is _page not page, fix the
parameter name.  It didn't cause any build error, it is probably because
the only caller is write_protect_page() from ksm.c, which pass in page.

Link: https://lkml.kernel.org/r/20220512174551.81279-1-shy828301@gmail.com
Fixes: 2aff7a4755be ("mm: Convert page_vma_mapped_walk to work on PFNs")
Signed-off-by: Yang Shi 
Reviewed-by: Muchun Song 
Reviewed-by: Matthew Wilcox (Oracle) 
Cc: Muchun Song 
Signed-off-by: Andrew Morton 
Signed-off-by: Sasha Levin

mm/rmap: Constify the rmap_walk_control argument

2022-03-21T17:01:35+00:00

The rmap walking functions do not modify the rmap_walk_control, and
page_idle_clear_pte_refs() takes advantage of that to move construction
of the rmap_walk_control to compile time.  This lets us remove an
unclean cast.

Signed-off-by: Matthew Wilcox (Oracle)

mm/rmap: Convert rmap_walk() to take a folio

2022-03-21T17:01:35+00:00

This ripples all the way through to every calling and called function
from rmap.

Signed-off-by: Matthew Wilcox (Oracle)

mm/rmap: Turn page_lock_anon_vma_read() into folio_lock_anon_vma_read()

2022-03-21T17:01:35+00:00

Add back page_lock_anon_vma_read() as a wrapper.  This saves a few calls
to compound_head().  If any callers were passing a tail page before,
this would have failed to lock the anon VMA as page->mapping is not
valid for tail pages.

Signed-off-by: Matthew Wilcox (Oracle)

mm/migrate: Convert remove_migration_ptes() to folios

2022-03-21T17:01:35+00:00

Convert the implementation and all callers.

Signed-off-by: Matthew Wilcox (Oracle)

mm/rmap: Convert try_to_migrate() to folios

2022-03-21T17:01:32+00:00

Convert the callers to pass a folio and the try_to_migrate_one()
worker to use a folio throughout.  Fixes an assumption that a
folio must be <= PMD size.

Signed-off-by: Matthew Wilcox (Oracle)

mm/rmap: Convert try_to_unmap() to take a folio

2022-03-21T16:59:03+00:00

Change all three callers and the worker function try_to_unmap_one().

Signed-off-by: Matthew Wilcox (Oracle)

mm/rmap: Turn page_referenced() into folio_referenced()

2022-03-21T16:59:03+00:00

Both its callers pass a page which was previously on an LRU list,
so were passing a folio by definition.  Use the type system to enforce
that and remove a few calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Christoph Hellwig

mm: Convert page_vma_mapped_walk to work on PFNs

2022-03-21T16:59:02+00:00

page_mapped_in_vma() really just wants to walk one page, but as the
code stands, if passed the head page of a compound page, it will
walk every page in the compound page.  Extract pfn/nr_pages/pgoff
from the struct page early, so they can be overridden by
page_mapped_in_vma().

Signed-off-by: Matthew Wilcox (Oracle)

mm: Add DEFINE_PAGE_VMA_WALK and DEFINE_FOLIO_VMA_WALK

2022-03-21T16:59:02+00:00

Instead of declaring a struct page_vma_mapped_walk directly,
use these helpers to allow us to transition to a PFN approach in the
following patches.

Signed-off-by: Matthew Wilcox (Oracle)