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authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 18:46:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 18:46:22 -0800
commit73da9e1a9f310a449eeb9bf5735a9cd475fef5e2 (patch)
tree82cd78255b0a480340a8427e7ba5586df8280ac4 /arch/sparc
parentb2fe5fa68642860e7de76167c3111623aa0d5de1 (diff)
parent3f56a2f8030071cf86520ef4fc3045ba6856e610 (diff)
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton: - misc fixes - ocfs2 updates - most of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits) mm: remove PG_highmem description tools, vm: new option to specify kpageflags file mm/swap.c: make functions and their kernel-doc agree mm, memory_hotplug: fix memmap initialization mm: correct comments regarding do_fault_around() mm: numa: do not trap faults on shared data section pages. hugetlb, mbind: fall back to default policy if vma is NULL hugetlb, mempolicy: fix the mbind hugetlb migration mm, hugetlb: further simplify hugetlb allocation API mm, hugetlb: get rid of surplus page accounting tricks mm, hugetlb: do not rely on overcommit limit during migration mm, hugetlb: integrate giga hugetlb more naturally to the allocation path mm, hugetlb: unify core page allocation accounting and initialization mm/memcontrol.c: try harder to decrease [memory,memsw].limit_in_bytes mm/memcontrol.c: make local symbol static mm/hmm: fix uninitialized use of 'entry' in hmm_vma_walk_pmd() include/linux/mmzone.h: fix explanation of lower bits in the SPARSEMEM mem_map pointer mm/compaction.c: fix comment for try_to_compact_pages() mm/page_ext.c: make page_ext_init a noop when CONFIG_PAGE_EXTENSION but nothing uses it zsmalloc: use U suffix for negative literals being shifted ...
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/pgtable_64.h2
-rw-r--r--arch/sparc/mm/tlb.c23
2 files changed, 19 insertions, 6 deletions
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 9937c5ff94a9..339920fdf9ed 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -1010,7 +1010,7 @@ void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd);
#define __HAVE_ARCH_PMDP_INVALIDATE
-extern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
+extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp);
#define __HAVE_ARCH_PGTABLE_DEPOSIT
diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c
index 4ae86bc0d35c..847ddffbf38a 100644
--- a/arch/sparc/mm/tlb.c
+++ b/arch/sparc/mm/tlb.c
@@ -219,17 +219,28 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
}
}
+static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp, pmd_t pmd)
+{
+ pmd_t old;
+
+ do {
+ old = *pmdp;
+ } while (cmpxchg64(&pmdp->pmd, old.pmd, pmd.pmd) != old.pmd);
+
+ return old;
+}
+
/*
* This routine is only called when splitting a THP
*/
-void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
+pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp)
{
- pmd_t entry = *pmdp;
-
- pmd_val(entry) &= ~_PAGE_VALID;
+ pmd_t old, entry;
- set_pmd_at(vma->vm_mm, address, pmdp, entry);
+ entry = __pmd(pmd_val(*pmdp) & ~_PAGE_VALID);
+ old = pmdp_establish(vma, address, pmdp, entry);
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
/*
@@ -240,6 +251,8 @@ void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
if ((pmd_val(entry) & _PAGE_PMD_HUGE) &&
!is_huge_zero_page(pmd_page(entry)))
(vma->vm_mm)->context.thp_pte_count--;
+
+ return old;
}
void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,

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