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authorOliver O'Halloran <oohall@gmail.com>2017-09-06 16:20:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-06 17:27:26 -0700
commit09180ca4b3bc7b1ffdbae62a75f716dfc0685861 (patch)
tree2128cd9de21d8803f14b7d6893738305388e9c89
parentdba58d3b8c5045ad89c1c95d33d01451e3964db7 (diff)
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>
-rw-r--r--mm/gup.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/gup.c b/mm/gup.c
index 23f01c40c88f..33d651deeae2 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1352,7 +1352,7 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
}
#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,
unsigned long end, struct page **pages, int *nr)
{