The patch titled
Subject: mm/migrate: remove useless mask of start address
has been added to the -mm tree. Its filename is
mm-migrate-remove-useless-mask-of-start-address.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-migrate-remove-useless-mask-of-start-address.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-migrate-remove-useless-mask-of-start-address.patch
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------------------------------------------------------
From: Ralph Campbell <rcampbell@xxxxxxxxxx>
Subject: mm/migrate: remove useless mask of start address
Addresses passed to walk_page_range() callback functions are already page
aligned and don't need to be masked with PAGE_MASK.
Link: http://lkml.kernel.org/r/20200107211208.24595-2-rcampbell@xxxxxxxxxx
Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx>
Cc: Jerome Glisse <jglisse@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Cc: "Bharata B Rao" <bharata@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/migrate.c~mm-migrate-remove-useless-mask-of-start-address
+++ a/mm/migrate.c
@@ -2135,7 +2135,7 @@ static int migrate_vma_collect_hole(unsi
struct migrate_vma *migrate = walk->private;
unsigned long addr;
- for (addr = start & PAGE_MASK; addr < end; addr += PAGE_SIZE) {
+ for (addr = start; addr < end; addr += PAGE_SIZE) {
migrate->src[migrate->npages] = MIGRATE_PFN_MIGRATE;
migrate->dst[migrate->npages] = 0;
migrate->npages++;
@@ -2152,7 +2152,7 @@ static int migrate_vma_collect_skip(unsi
struct migrate_vma *migrate = walk->private;
unsigned long addr;
- for (addr = start & PAGE_MASK; addr < end; addr += PAGE_SIZE) {
+ for (addr = start; addr < end; addr += PAGE_SIZE) {
migrate->dst[migrate->npages] = 0;
migrate->src[migrate->npages++] = 0;
}
_
Patches currently in -mm which might be from rcampbell@xxxxxxxxxx are
mm-migrate-remove-useless-mask-of-start-address.patch
mm-migrate-clean-up-some-minor-coding-style.patch
mm-migrate-add-stable-check-in-migrate_vma_insert_page.patch
