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include/linux/huge_mm.h: check PageTail in hpage_nr_pages even when !THP

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It's even more important to check that we don't have a tail page when
calling hpage_nr_pages() when THP are disabled.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Link: http://lkml.kernel.org/r/20200318140253.6141-4-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2020-04-01 21:11:58 -07:00 committed by Linus Torvalds
parent bb297bb2de
commit 77d6b90948
1 changed files with 5 additions and 1 deletions
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6
include/linux/huge_mm.h
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@ -287,7 +287,11 @@ 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; })
#define hpage_nr_pages(x) 1
static inline int hpage_nr_pages(struct page *page)
{
VM_BUG_ON_PAGE(PageTail(page), page);
return 1;
}
static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
{