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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-06 02:32:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-06 02:32:45 +0300
commit6614a3c3164a5df2b54abb0b3559f51041cf705b (patch)
tree1c25c23d9efed988705287fc2ccb78e0e76e311d /arch/s390/mm
parent74cae210a335d159f2eb822e261adee905b6951a (diff)
parent360614c01f81f48a89d8b13f8fa69c3ae0a1f5c7 (diff)
downloadlinux-6614a3c3164a5df2b54abb0b3559f51041cf705b.tar.xz
Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton: "Most of the MM queue. A few things are still pending. Liam's maple tree rework didn't make it. This has resulted in a few other minor patch series being held over for next time. Multi-gen LRU still isn't merged as we were waiting for mapletree to stabilize. The current plan is to merge MGLRU into -mm soon and to later reintroduce mapletree, with a view to hopefully getting both into 6.1-rc1. Summary: - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe Lin, Yang Shi, Anshuman Khandual and Mike Rapoport - Some kmemleak fixes from Patrick Wang and Waiman Long - DAMON updates from SeongJae Park - memcg debug/visibility work from Roman Gushchin - vmalloc speedup from Uladzislau Rezki - more folio conversion work from Matthew Wilcox - enhancements for coherent device memory mapping from Alex Sierra - addition of shared pages tracking and CoW support for fsdax, from Shiyang Ruan - hugetlb optimizations from Mike Kravetz - Mel Gorman has contributed some pagealloc changes to improve latency and realtime behaviour. - mprotect soft-dirty checking has been improved by Peter Xu - Many other singleton patches all over the place" [ XFS merge from hell as per Darrick Wong in https://lore.kernel.org/all/YshKnxb4VwXycPO8@magnolia/ ] * tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (282 commits) tools/testing/selftests/vm/hmm-tests.c: fix build mm: Kconfig: fix typo mm: memory-failure: convert to pr_fmt() mm: use is_zone_movable_page() helper hugetlbfs: fix inaccurate comment in hugetlbfs_statfs() hugetlbfs: cleanup some comments in inode.c hugetlbfs: remove unneeded header file hugetlbfs: remove unneeded hugetlbfs_ops forward declaration hugetlbfs: use helper macro SZ_1{K,M} mm: cleanup is_highmem() mm/hmm: add a test for cross device private faults selftests: add soft-dirty into run_vmtests.sh selftests: soft-dirty: add test for mprotect mm/mprotect: fix soft-dirty check in can_change_pte_writable() mm: memcontrol: fix potential oom_lock recursion deadlock mm/gup.c: fix formatting in check_and_migrate_movable_page() xfs: fail dax mount if reflink is enabled on a partition mm/memcontrol.c: remove the redundant updating of stats_flush_threshold userfaultfd: don't fail on unrecognized features hugetlb_cgroup: fix wrong hugetlb cgroup numa stat ...
Diffstat (limited to 'arch/s390/mm')
-rw-r--r--arch/s390/mm/fault.c12
-rw-r--r--arch/s390/mm/mmap.c20
2 files changed, 32 insertions, 0 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index ee7871f770fb..13449941516c 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -433,6 +433,17 @@ retry:
goto out_up;
goto out;
}
+
+ /* The fault is fully completed (including releasing mmap lock) */
+ if (fault & VM_FAULT_COMPLETED) {
+ if (gmap) {
+ mmap_read_lock(mm);
+ goto out_gmap;
+ }
+ fault = 0;
+ goto out;
+ }
+
if (unlikely(fault & VM_FAULT_ERROR))
goto out_up;
@@ -452,6 +463,7 @@ retry:
mmap_read_lock(mm);
goto retry;
}
+out_gmap:
if (IS_ENABLED(CONFIG_PGSTE) && gmap) {
address = __gmap_link(gmap, current->thread.gmap_addr,
address);
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index d545f5c39f7e..5980ce348832 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -188,3 +188,23 @@ void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
mm->get_unmapped_area = arch_get_unmapped_area_topdown;
}
}
+
+static const pgprot_t protection_map[16] = {
+ [VM_NONE] = PAGE_NONE,
+ [VM_READ] = PAGE_RO,
+ [VM_WRITE] = PAGE_RO,
+ [VM_WRITE | VM_READ] = PAGE_RO,
+ [VM_EXEC] = PAGE_RX,
+ [VM_EXEC | VM_READ] = PAGE_RX,
+ [VM_EXEC | VM_WRITE] = PAGE_RX,
+ [VM_EXEC | VM_WRITE | VM_READ] = PAGE_RX,
+ [VM_SHARED] = PAGE_NONE,
+ [VM_SHARED | VM_READ] = PAGE_RO,
+ [VM_SHARED | VM_WRITE] = PAGE_RW,
+ [VM_SHARED | VM_WRITE | VM_READ] = PAGE_RW,
+ [VM_SHARED | VM_EXEC] = PAGE_RX,
+ [VM_SHARED | VM_EXEC | VM_READ] = PAGE_RX,
+ [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_RWX,
+ [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_RWX
+};
+DECLARE_VM_GET_PAGE_PROT