From: Zi Yan <ziy@xxxxxxxxxx>
On SPARSEMEM without VMEMMAP, struct page is not guaranteed to be
contiguous, since each memory section's memmap might be allocated
independently. hugetlb pages can go beyond a memory section size, thus
direct struct page manipulation on hugetlb pages/subpages might give
wrong struct page. Kernel provides nth_page() to do the manipulation
properly. Use that whenever code can see hugetlb pages.
The patches are on top of next-20230906
Changes from v1:
1. Separated first patch into three and add Fixes for better backport.
2. Collected Reviewed-by.
Zi Yan (5):
mm/cma: use nth_page() in place of direct struct page manipulation.
mm/hugetlb: use nth_page() in place of direct struct page
manipulation.
mm/memory_hotplug: use nth_page() in place of direct struct page
manipulation.
fs: use nth_page() in place of direct struct page manipulation.
mips: use nth_page() in place of direct struct page manipulation.
arch/mips/mm/cache.c | 2 +-
fs/hugetlbfs/inode.c | 4 ++--
mm/cma.c | 2 +-
mm/hugetlb.c | 2 +-
mm/memory_hotplug.c | 2 +-
5 files changed, 6 insertions(+), 6 deletions(-)
--
2.40.1
