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| author | Miaohe Lin <linmiaohe@huawei.com> | 2021-05-05 03:37:13 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-05 20:27:24 +0200 |
| commit | 843e1be108b9130e5ec5a78a14f77dc237c83e1e (patch) | |
| tree | 1e4fba73a195d16e1e5a66f043a85f6793999e20 /mm | |
| parent | mm/migrate.c: fix potential indeterminate pte entry in migrate_vma_insert_page() (diff) | |
| download | linux-843e1be108b9130e5ec5a78a14f77dc237c83e1e.tar.xz linux-843e1be108b9130e5ec5a78a14f77dc237c83e1e.zip | |
mm/migrate.c: use helper migrate_vma_collect_skip() in migrate_vma_collect_hole()
It's more recommended to use helper function migrate_vma_collect_skip() to
skip the unexpected case and it also helps remove some duplicated codes.
Move migrate_vma_collect_skip() above migrate_vma_collect_hole() to avoid
compiler warning.
Link: https://lkml.kernel.org/r/20210325131524.48181-5-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/migrate.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index c40075d48ef9..6876696ab302 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2290,44 +2290,38 @@ out: #endif /* CONFIG_NUMA */ #ifdef CONFIG_DEVICE_PRIVATE -static int migrate_vma_collect_hole(unsigned long start, +static int migrate_vma_collect_skip(unsigned long start, unsigned long end, - __always_unused int depth, struct mm_walk *walk) { struct migrate_vma *migrate = walk->private; unsigned long addr; - /* Only allow populating anonymous memory. */ - if (!vma_is_anonymous(walk->vma)) { - for (addr = start; addr < end; addr += PAGE_SIZE) { - migrate->src[migrate->npages] = 0; - migrate->dst[migrate->npages] = 0; - migrate->npages++; - } - return 0; - } - for (addr = start; addr < end; addr += PAGE_SIZE) { - migrate->src[migrate->npages] = MIGRATE_PFN_MIGRATE; migrate->dst[migrate->npages] = 0; - migrate->npages++; - migrate->cpages++; + migrate->src[migrate->npages++] = 0; } return 0; } -static int migrate_vma_collect_skip(unsigned long start, +static int migrate_vma_collect_hole(unsigned long start, unsigned long end, + __always_unused int depth, struct mm_walk *walk) { struct migrate_vma *migrate = walk->private; unsigned long addr; + /* Only allow populating anonymous memory. */ + if (!vma_is_anonymous(walk->vma)) + return migrate_vma_collect_skip(start, end, walk); + for (addr = start; addr < end; addr += PAGE_SIZE) { + migrate->src[migrate->npages] = MIGRATE_PFN_MIGRATE; migrate->dst[migrate->npages] = 0; - migrate->src[migrate->npages++] = 0; + migrate->npages++; + migrate->cpages++; } return 0; |