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| author |   Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-06-07 21:08:42 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-10 13:37:14 +0200 |
| commit | fd8e06a7a7238fa6040d602d6085f11f246ec11a (patch) | |
| tree | 9771110d92b508002f13e23c740d02317c344a62 | |
| parent | bnxt_en: Remove the setting of dev_port. (diff) | |
| download | wireguard-linux-fd8e06a7a7238fa6040d602d6085f11f246ec11a.tar.xz wireguard-linux-fd8e06a7a7238fa6040d602d6085f11f246ec11a.zip | |
mm: add thp_order
commit 6ffbb45826f5d9ae09aa60cd88594b7816c96190 upstream
This function returns the order of a transparent huge page. It compiles
to 0 if CONFIG_TRANSPARENT_HUGEPAGE is disabled.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Link: http://lkml.kernel.org/r/20200629151959.15779-4-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/huge_mm.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 93d5cf0bc716..d8b86fd39113 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -231,6 +231,19 @@ static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, else return NULL; } + +/** + * thp_order - Order of a transparent huge page. + * @page: Head page of a transparent huge page. + */ +static inline unsigned int thp_order(struct page *page) +{ + VM_BUG_ON_PGFLAGS(PageTail(page), page); + if (PageHead(page)) + return HPAGE_PMD_ORDER; + return 0; +} + static inline int hpage_nr_pages(struct page *page) { if (unlikely(PageTransHuge(page))) @@ -290,6 +303,12 @@ static inline struct list_head *page_deferred_list(struct page *page) #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) +static inline unsigned int thp_order(struct page *page) +{ + VM_BUG_ON_PGFLAGS(PageTail(page), page); + return 0; +} + #define hpage_nr_pages(x) 1 static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma) |