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authorMatthew Wilcox <mawilcox@microsoft.com>2018-06-07 17:08:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:37 -0700
commita052f0a5168ef99c517f6638aaec59f39060f81d (patch)
tree9fd7579eafc6cf0f74ae16f25f5300afaed8be55 /include
parent97b4a671987123009724dfbdf188ec6e122573d4 (diff)
mm: add pt_mm to struct page
For pgd page table pages, x86 overloads the page->index field to store a pointer to the mm_struct. Rename this to pt_mm so it's visible to other users. Link: http://lkml.kernel.org/r/20180518194519.3820-13-willy@infradead.org Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm_types.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 9b45760cc797..811aa0c71e1a 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -139,7 +139,7 @@ struct page {
unsigned long _pt_pad_1; /* compound_head */
pgtable_t pmd_huge_pte; /* protected by page->ptl */
unsigned long _pt_pad_2; /* mapping */
- unsigned long _pt_pad_3;
+ struct mm_struct *pt_mm; /* x86 pgds only */
#if ALLOC_SPLIT_PTLOCKS
spinlock_t *ptl;
#else