diff options
| author | Vishal Moola (Oracle) <vishal.moola@gmail.com> | 2025-07-09 12:40:17 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-19 18:59:51 -0700 |
| commit | 0c092fef53f08f1e461b180c61dddc30491ec855 (patch) | |
| tree | 588b65b8c2d76ef66ac2b08e3c4dc46d415af91c | |
| parent | 0ec5eea20821287d9d9d4ec477f7cd0e15315518 (diff) | |
mm/memory.c: use folios in __access_remote_vm()
Use kmap_local_folio() instead of kmap_local_page(). Replaces 2 calls to
compound_head() with one.
This prepares us for the removal of unmap_and_put_page().
Link: https://lkml.kernel.org/r/20250709194017.927978-5-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Jordan Rome <linux@jordanrome.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/memory.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mm/memory.c b/mm/memory.c index cb2f1296854a..bc27b1990fcb 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -6691,6 +6691,7 @@ static int __access_remote_vm(struct mm_struct *mm, unsigned long addr, while (len) { int bytes, offset; void *maddr; + struct folio *folio; struct vm_area_struct *vma = NULL; struct page *page = get_user_page_vma_remote(mm, addr, gup_flags, &vma); @@ -6722,21 +6723,22 @@ static int __access_remote_vm(struct mm_struct *mm, unsigned long addr, if (bytes <= 0) break; } else { + folio = page_folio(page); bytes = len; offset = addr & (PAGE_SIZE-1); if (bytes > PAGE_SIZE-offset) bytes = PAGE_SIZE-offset; - maddr = kmap_local_page(page); + maddr = kmap_local_folio(folio, folio_page_idx(folio, page) * PAGE_SIZE); if (write) { copy_to_user_page(vma, page, addr, maddr + offset, buf, bytes); - set_page_dirty_lock(page); + folio_mark_dirty_lock(folio); } else { copy_from_user_page(vma, page, addr, buf, maddr + offset, bytes); } - unmap_and_put_page(page, maddr); + folio_release_kmap(folio, maddr); } len -= bytes; buf += bytes; |