diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/gup.c | 5 | ||||
| -rw-r--r-- | arch/x86/mm/gup.c | 5 |
2 files changed, 6 insertions, 4 deletions
diff --git a/arch/powerpc/mm/gup.c b/arch/powerpc/mm/gup.c index fec13200868f..b9e1c7ff5f6d 100644 --- a/arch/powerpc/mm/gup.c +++ b/arch/powerpc/mm/gup.c @@ -22,8 +22,9 @@ static inline void get_huge_page_tail(struct page *page) * __split_huge_page_refcount() cannot run * from under us. */ - VM_BUG_ON(atomic_read(&page->_count) < 0); - atomic_inc(&page->_count); + VM_BUG_ON(page_mapcount(page) < 0); + VM_BUG_ON(atomic_read(&page->_count) != 0); + atomic_inc(&page->_mapcount); } /* diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c index dbe34b931374..3b5032a62b0f 100644 --- a/arch/x86/mm/gup.c +++ b/arch/x86/mm/gup.c @@ -114,8 +114,9 @@ static inline void get_huge_page_tail(struct page *page) * __split_huge_page_refcount() cannot run * from under us. */ - VM_BUG_ON(atomic_read(&page->_count) < 0); - atomic_inc(&page->_count); + VM_BUG_ON(page_mapcount(page) < 0); + VM_BUG_ON(atomic_read(&page->_count) != 0); + atomic_inc(&page->_mapcount); } static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr, |