Hi, This patchset updates the hugetlb code to fix issues arising from contiguous pte hugepages (such as on arm64). These are the generic code changes and the arm64 support based on these patches will be posted separately. The patches are based on v4.12-rc2. Previous related postings can be found at [0], [1] and [2]. The patches fall into two categories - * Patches 1-2 address issues with gup * Patches 3-6 relate to passing a size argument to hugepage helpers to disambiguate the size of the referred page. These changes are required to enable arch code to properly handle swap entries for contiguous pte hugepages. The changes to huge_pte_offset() (patch 3) touch multiple architectures but I've managed to minimise these changes for the other affected functions - huge_pte_clear() and set_huge_pte_at(). These patches gate the enabling of contiguous hugepages support on arm64 which has been requested for systems using !4k page granule. Feedback welcome. Thanks, Punit v2 -> v3 * Added gup fixes v1 -> v2 * switch huge_pte_offset() to use size instead of hstate for consistency with the rest of the api * Expand the series to address huge_pte_clear() and set_huge_pte_at() RFC -> v1 * Fixed a missing conversion of huge_pte_offset() prototype to add hstate parameter. Reported by 0-day. [0] https://lkml.org/lkml/2017/3/23/293 [1] https://lkml.org/lkml/2017/3/30/770 [2] http://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1370686.html Punit Agrawal (5): mm, gup: Ensure real head page is ref-counted when using hugepages mm/hugetlb: add size parameter to huge_pte_offset() mm/hugetlb: Allow architectures to override huge_pte_clear() mm/hugetlb: Introduce set_huge_swap_pte_at() helper mm: rmap: Use correct helper when poisoning hugepages Will Deacon (1): mm, gup: Remove broken VM_BUG_ON_PAGE compound check for hugepages arch/arm64/mm/hugetlbpage.c | 3 ++- arch/ia64/mm/hugetlbpage.c | 4 ++-- arch/metag/mm/hugetlbpage.c | 3 ++- arch/mips/mm/hugetlbpage.c | 3 ++- arch/parisc/mm/hugetlbpage.c | 3 ++- arch/powerpc/mm/hugetlbpage.c | 2 +- arch/s390/include/asm/hugetlb.h | 10 ++------- arch/s390/mm/hugetlbpage.c | 12 ++++++++++- arch/sh/mm/hugetlbpage.c | 3 ++- arch/sparc/mm/hugetlbpage.c | 3 ++- arch/tile/mm/hugetlbpage.c | 3 ++- arch/x86/mm/hugetlbpage.c | 2 +- fs/userfaultfd.c | 7 +++++-- include/asm-generic/hugetlb.h | 7 ++----- include/linux/hugetlb.h | 7 +++++-- mm/gup.c | 15 ++++++-------- mm/hugetlb.c | 45 +++++++++++++++++++++++++++++------------ mm/page_vma_mapped.c | 3 ++- mm/pagewalk.c | 3 ++- mm/rmap.c | 7 +++++-- 20 files changed, 90 insertions(+), 55 deletions(-) -- 2.11.0
