diff options
| author | Matthew Wilcox (Oracle) <[email protected]> | 2020-08-14 17:30:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2020-08-14 19:56:56 -0700 |
| commit | af3bbc12df80e8c279b94c752b6edca29841f4f5 (patch) | |
| tree | 5e69277956e96fe4ccce71613db1f66dd13b1441 /include/linux | |
| parent | 6ffbb45826f5d9ae09aa60cd88594b7816c96190 (diff) | |
mm: add thp_size
This function returns the number of bytes in a THP. It is like
page_size(), but compiles to just PAGE_SIZE if CONFIG_TRANSPARENT_HUGEPAGE
is disabled.
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Reviewed-by: William Kucharski <[email protected]>
Reviewed-by: Zi Yan <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/huge_mm.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 9521cfdf18ca..9b33ac774fdd 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -462,4 +462,15 @@ static inline bool thp_migration_supported(void) } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +/** + * thp_size - Size of a transparent huge page. + * @page: Head page of a transparent huge page. + * + * Return: Number of bytes in this page. + */ +static inline unsigned long thp_size(struct page *page) +{ + return PAGE_SIZE << thp_order(page); +} + #endif /* _LINUX_HUGE_MM_H */ |