mm/rmap: remove do_page_add_anon_rmap()

... and instead convert page_add_anon_rmap() to accept flags.

Passing flags instead of bools is usually nicer either way, and we want to
more often also pass RMAP_EXCLUSIVE in follow up patches when detecting
that an anonymous page is exclusive: for example, when restoring an
anonymous page from a writable migration entry.

This is a preparation for marking an anonymous page inside
page_add_anon_rmap() as exclusive when RMAP_EXCLUSIVE is passed.

Link: https://lkml.kernel.org/r/20220428083441.37290-7-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Don Dutile <ddutile@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Liang Zhang <zhangliang5@huawei.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index c53a381..643801a 100644 (file)
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -183,8 +183,6 @@ typedef int __bitwise rmap_t;
  */
 void page_move_anon_rmap(struct page *, struct vm_area_struct *);
 void page_add_anon_rmap(struct page *, struct vm_area_struct *,
-               unsigned long address, bool compound);
-void do_page_add_anon_rmap(struct page *, struct vm_area_struct *,
                unsigned long address, rmap_t flags);
 void page_add_new_anon_rmap(struct page *, struct vm_area_struct *,
                unsigned long address, bool compound);

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index baf4ea6..6232b68 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3072,7 +3072,7 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
                pmde = pmd_wrprotect(pmd_mkuffd_wp(pmde));
 
        if (PageAnon(new))
-               page_add_anon_rmap(new, vma, mmun_start, true);
+               page_add_anon_rmap(new, vma, mmun_start, RMAP_COMPOUND);
        else
                page_add_file_rmap(new, vma, true);
        set_pmd_at(mm, mmun_start, pvmw->pmd, pmde);

diff --git a/mm/ksm.c b/mm/ksm.c
index 94bb0f0..2b6692a 100644 (file)
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1156,7 +1156,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
         */
        if (!is_zero_pfn(page_to_pfn(kpage))) {
                get_page(kpage);
-               page_add_anon_rmap(kpage, vma, addr, false);
+               page_add_anon_rmap(kpage, vma, addr, RMAP_NONE);
                newpte = mk_pte(kpage, vma->vm_page_prot);
        } else {
                newpte = pte_mkspecial(pfn_pte(page_to_pfn(kpage),

diff --git a/mm/memory.c b/mm/memory.c
index 4cd8cad..8e92010 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -725,7 +725,7 @@ static void restore_exclusive_pte(struct vm_area_struct *vma,
         * created when the swap entry was made.
         */
        if (PageAnon(page))
-               page_add_anon_rmap(page, vma, address, false);
+               page_add_anon_rmap(page, vma, address, RMAP_NONE);
        else
                /*
                 * Currently device exclusive access only supports anonymous
@@ -3705,7 +3705,7 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
                page_add_new_anon_rmap(page, vma, vmf->address, false);
                lru_cache_add_inactive_or_unevictable(page, vma);
        } else {
-               do_page_add_anon_rmap(page, vma, vmf->address, rmap_flags);
+               page_add_anon_rmap(page, vma, vmf->address, rmap_flags);
        }
 
        set_pte_at(vma->vm_mm, vmf->address, vmf->pte, pte);

diff --git a/mm/migrate.c b/mm/migrate.c
index 6ca6e89..381c7e0 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -240,7 +240,8 @@ static bool remove_migration_pte(struct folio *folio,
 #endif
                {
                        if (folio_test_anon(folio))
-                               page_add_anon_rmap(new, vma, pvmw.address, false);
+                               page_add_anon_rmap(new, vma, pvmw.address,
+                                                  RMAP_NONE);
                        else
                                page_add_file_rmap(new, vma, false);
                        set_pte_at(vma->vm_mm, pvmw.address, pvmw.pte, pte);

diff --git a/mm/rmap.c b/mm/rmap.c
index 23a4113..a0cbbf2 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1171,7 +1171,7 @@ static void __page_check_anon_rmap(struct page *page,
  * @page:      the page to add the mapping to
  * @vma:       the vm area in which the mapping is added
  * @address:   the user virtual address mapped
- * @compound:  charge the page as compound or small page
+ * @flags:     the rmap flags
  *
  * The caller needs to hold the pte lock, and the page must be locked in
  * the anon_vma case: to serialize mapping,index checking after setting,
@@ -1179,18 +1179,6 @@ static void __page_check_anon_rmap(struct page *page,
  * (but PageKsm is never downgraded to PageAnon).
  */
 void page_add_anon_rmap(struct page *page,
-       struct vm_area_struct *vma, unsigned long address, bool compound)
-{
-       do_page_add_anon_rmap(page, vma, address,
-                             compound ? RMAP_COMPOUND : RMAP_NONE);
-}
-
-/*
- * Special version of the above for do_swap_page, which often runs
- * into pages that are exclusively owned by the current process.
- * Everybody else should continue to use page_add_anon_rmap above.
- */
-void do_page_add_anon_rmap(struct page *page,
        struct vm_area_struct *vma, unsigned long address, rmap_t flags)
 {
        bool compound = flags & RMAP_COMPOUND;

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 63c61f8..1ba525a 100644 (file)
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1800,7 +1800,7 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
        inc_mm_counter(vma->vm_mm, MM_ANONPAGES);
        get_page(page);
        if (page == swapcache) {
-               page_add_anon_rmap(page, vma, addr, false);
+               page_add_anon_rmap(page, vma, addr, RMAP_NONE);
        } else { /* ksm created a completely new copy */
                page_add_new_anon_rmap(page, vma, addr, false);
                lru_cache_add_inactive_or_unevictable(page, vma);