diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 41a0fbddc96b..9b3ee79d0edf 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -527,6 +527,17 @@ void prep_transhuge_page(struct page *page) set_compound_page_dtor(page, TRANSHUGE_PAGE_DTOR); } +bool is_transparent_hugepage(struct page *page) +{ + if (!PageCompound(page)) + return 0; + + page = compound_head(page); + return is_huge_zero_page(page) || + page[1].compound_dtor == TRANSHUGE_PAGE_DTOR; +} +EXPORT_SYMBOL_GPL(is_transparent_hugepage); + static unsigned long __thp_get_unmapped_area(struct file *filp, unsigned long len, loff_t off, unsigned long flags, unsigned long size) { |