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From:   John Hubbard <jhubbard@nvidia.com>
To:     Andrew Morton <akpm@linux-foundation.org>
CC:     Al Viro <viro@zeniv.linux.org.uk>,
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Subject: [PATCH v6 02/12] mm/gup: pass a flags arg to __gup_device_* functions
Date:   Mon, 10 Feb 2020 16:15:26 -0800
Message-ID: <20200211001536.1027652-3-jhubbard@nvidia.com>
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A subsequent patch requires access to gup flags, so pass the flags
argument through to the __gup_device_* functions.

Also placate checkpatch.pl by shortening a nearby line.

Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: J=C3=A9r=C3=B4me Glisse <jglisse@redhat.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 mm/gup.c | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index b699500da077..9e117998274c 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1963,7 +1963,8 @@ static int gup_pte_range(pmd_t pmd, unsigned long add=
r, unsigned long end,
=20
 #if defined(CONFIG_ARCH_HAS_PTE_DEVMAP) && defined(CONFIG_TRANSPARENT_HUGE=
PAGE)
 static int __gup_device_huge(unsigned long pfn, unsigned long addr,
-		unsigned long end, struct page **pages, int *nr)
+			     unsigned long end, unsigned int flags,
+			     struct page **pages, int *nr)
 {
 	int nr_start =3D *nr;
 	struct dev_pagemap *pgmap =3D NULL;
@@ -1989,13 +1990,14 @@ static int __gup_device_huge(unsigned long pfn, uns=
igned long addr,
 }
=20
 static int __gup_device_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long ad=
dr,
-		unsigned long end, struct page **pages, int *nr)
+				 unsigned long end, unsigned int flags,
+				 struct page **pages, int *nr)
 {
 	unsigned long fault_pfn;
 	int nr_start =3D *nr;
=20
 	fault_pfn =3D pmd_pfn(orig) + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
-	if (!__gup_device_huge(fault_pfn, addr, end, pages, nr))
+	if (!__gup_device_huge(fault_pfn, addr, end, flags, pages, nr))
 		return 0;
=20
 	if (unlikely(pmd_val(orig) !=3D pmd_val(*pmdp))) {
@@ -2006,13 +2008,14 @@ static int __gup_device_huge_pmd(pmd_t orig, pmd_t =
*pmdp, unsigned long addr,
 }
=20
 static int __gup_device_huge_pud(pud_t orig, pud_t *pudp, unsigned long ad=
dr,
-		unsigned long end, struct page **pages, int *nr)
+				 unsigned long end, unsigned int flags,
+				 struct page **pages, int *nr)
 {
 	unsigned long fault_pfn;
 	int nr_start =3D *nr;
=20
 	fault_pfn =3D pud_pfn(orig) + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
-	if (!__gup_device_huge(fault_pfn, addr, end, pages, nr))
+	if (!__gup_device_huge(fault_pfn, addr, end, flags, pages, nr))
 		return 0;
=20
 	if (unlikely(pud_val(orig) !=3D pud_val(*pudp))) {
@@ -2023,14 +2026,16 @@ static int __gup_device_huge_pud(pud_t orig, pud_t =
*pudp, unsigned long addr,
 }
 #else
 static int __gup_device_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long ad=
dr,
-		unsigned long end, struct page **pages, int *nr)
+				 unsigned long end, unsigned int flags,
+				 struct page **pages, int *nr)
 {
 	BUILD_BUG();
 	return 0;
 }
=20
 static int __gup_device_huge_pud(pud_t pud, pud_t *pudp, unsigned long add=
r,
-		unsigned long end, struct page **pages, int *nr)
+				 unsigned long end, unsigned int flags,
+				 struct page **pages, int *nr)
 {
 	BUILD_BUG();
 	return 0;
@@ -2146,7 +2151,8 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsi=
gned long addr,
 	if (pmd_devmap(orig)) {
 		if (unlikely(flags & FOLL_LONGTERM))
 			return 0;
-		return __gup_device_huge_pmd(orig, pmdp, addr, end, pages, nr);
+		return __gup_device_huge_pmd(orig, pmdp, addr, end, flags,
+					     pages, nr);
 	}
=20
 	page =3D pmd_page(orig) + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
@@ -2167,7 +2173,8 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsi=
gned long addr,
 }
=20
 static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
-		unsigned long end, unsigned int flags, struct page **pages, int *nr)
+			unsigned long end, unsigned int flags,
+			struct page **pages, int *nr)
 {
 	struct page *head, *page;
 	int refs;
@@ -2178,7 +2185,8 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsi=
gned long addr,
 	if (pud_devmap(orig)) {
 		if (unlikely(flags & FOLL_LONGTERM))
 			return 0;
-		return __gup_device_huge_pud(orig, pudp, addr, end, pages, nr);
+		return __gup_device_huge_pud(orig, pudp, addr, end, flags,
+					     pages, nr);
 	}
=20
 	page =3D pud_page(orig) + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
--=20
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