diff options
| author | Matthew Wilcox <mawilcox@microsoft.com> | 2018-06-07 17:09:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-07 17:34:37 -0700 |
| commit | 50e7fbc3bf0c3e41af0075f17a9e4ddefa82e1b5 (patch) | |
| tree | dcab567ca396c67f0ab9e060644ee74491bae532 /include | |
| parent | a052f0a5168ef99c517f6638aaec59f39060f81d (diff) | |
mm: add hmm_data to struct page
Make hmm_data an explicit member of the struct page union.
Link: http://lkml.kernel.org/r/20180518194519.3820-14-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/hmm.h | 8 | ||||
| -rw-r--r-- | include/linux/mm_types.h | 12 |
2 files changed, 8 insertions, 12 deletions
diff --git a/include/linux/hmm.h b/include/linux/hmm.h index 2f1327c37a63..4c92e3ba3e16 100644 --- a/include/linux/hmm.h +++ b/include/linux/hmm.h @@ -522,9 +522,7 @@ void hmm_devmem_remove(struct hmm_devmem *devmem); static inline void hmm_devmem_page_set_drvdata(struct page *page, unsigned long data) { - unsigned long *drvdata = (unsigned long *)&page->pgmap; - - drvdata[1] = data; + page->hmm_data = data; } /* @@ -535,9 +533,7 @@ static inline void hmm_devmem_page_set_drvdata(struct page *page, */ static inline unsigned long hmm_devmem_page_get_drvdata(const struct page *page) { - const unsigned long *drvdata = (const unsigned long *)&page->pgmap; - - return drvdata[1]; + return page->hmm_data; } diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 811aa0c71e1a..99ce070e7dcb 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -146,15 +146,15 @@ struct page { spinlock_t ptl; #endif }; + struct { /* ZONE_DEVICE pages */ + /** @pgmap: Points to the hosting device page map. */ + struct dev_pagemap *pgmap; + unsigned long hmm_data; + unsigned long _zd_pad_1; /* uses mapping */ + }; /** @rcu_head: You can use this to free a page by RCU. */ struct rcu_head rcu_head; - - /** - * @pgmap: For ZONE_DEVICE pages, this points to the hosting - * device page map. - */ - struct dev_pagemap *pgmap; }; union { /* This union is 4 bytes in size. */ |