kernel.git/include/linux/rmap.h, branch linux-5.18.y

mm: rmap: use the correct parameter name for DEFINE_PAGE_VMA_WALK

2022-08-17T12:41:42Z

[ 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

2022-03-21T17:01:35Z

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

2022-03-21T17:01:35Z

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()

2022-03-21T17:01:35Z

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

2022-03-21T17:01:35Z

Convert the implementation and all callers. Signed-off-by: Matthew Wilcox (Oracle)

mm/rmap: Convert try_to_migrate() to folios

2022-03-21T17:01:32Z

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

2022-03-21T16:59:03Z

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()

2022-03-21T16:59:03Z

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

2022-03-21T16:59:02Z

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

2022-03-21T16:59:02Z

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)