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mm/gup: make __gup_device_* require THP 

These functions are the only bits of generic code that use
{pud,pmd}_pfn() without checking for CONFIG_TRANSPARENT_HUGEPAGE.  This
works fine on x86, the only arch with devmap support, since the *_pfn()
functions are always defined there, but this isn't true for every
architecture.

Link: http://lkml.kernel.org/r/20170626063833.11094-1-oohall@gmail.com
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oliver O'Halloran 2017-09-06 16:20:58 -07:00 committed by Linus Torvalds
parent dba58d3b8c
commit 09180ca4b3
1 changed files with 1 additions and 1 deletions
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2
mm/gup.c
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@ -1352,7 +1352,7 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
} }
#endif /* __HAVE_ARCH_PTE_SPECIAL */ #endif /* __HAVE_ARCH_PTE_SPECIAL */
#ifdef __HAVE_ARCH_PTE_DEVMAP #if defined(__HAVE_ARCH_PTE_DEVMAP) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
static int __gup_device_huge(unsigned long pfn, unsigned long addr, static int __gup_device_huge(unsigned long pfn, unsigned long addr,
unsigned long end, struct page **pages, int *nr) unsigned long end, struct page **pages, int *nr)
{ {