From: Oliver O'Halloran <oohall@gmail.com>
Date: Wed, 6 Sep 2017 23:20:58 +0000 (-0700)
Subject: mm/gup: make __gup_device_* require THP
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=09180ca4b3bc7b1ffdbae62a75f716dfc0685861;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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>
---

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)
 {