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-rw-r--r--mm/gup.c34
1 files changed, 4 insertions, 30 deletions
diff --git a/mm/gup.c b/mm/gup.c
index 1c50b506888d..7017abea9fd6 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -130,7 +130,7 @@ retry:
}
if (flags & FOLL_GET)
- get_page_foll(page);
+ get_page(page);
if (flags & FOLL_TOUCH) {
if ((flags & FOLL_WRITE) &&
!pte_dirty(pte) && !PageDirty(page))
@@ -1153,7 +1153,7 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr,
unsigned long end, int write, struct page **pages, int *nr)
{
- struct page *head, *page, *tail;
+ struct page *head, *page;
int refs;
if (write && !pmd_write(orig))
@@ -1162,7 +1162,6 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr,
refs = 0;
head = pmd_page(orig);
page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
- tail = page;
do {
VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
@@ -1183,24 +1182,13 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr,
return 0;
}
- /*
- * Any tail pages need their mapcount reference taken before we
- * return. (This allows the THP code to bump their ref count when
- * they are split into base pages).
- */
- while (refs--) {
- if (PageTail(tail))
- get_huge_page_tail(tail);
- tail++;
- }
-
return 1;
}
static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
unsigned long end, int write, struct page **pages, int *nr)
{
- struct page *head, *page, *tail;
+ struct page *head, *page;
int refs;
if (write && !pud_write(orig))
@@ -1209,7 +1197,6 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
refs = 0;
head = pud_page(orig);
page = head + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
- tail = page;
do {
VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
@@ -1230,12 +1217,6 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
return 0;
}
- while (refs--) {
- if (PageTail(tail))
- get_huge_page_tail(tail);
- tail++;
- }
-
return 1;
}
@@ -1244,7 +1225,7 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr,
struct page **pages, int *nr)
{
int refs;
- struct page *head, *page, *tail;
+ struct page *head, *page;
if (write && !pgd_write(orig))
return 0;
@@ -1252,7 +1233,6 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr,
refs = 0;
head = pgd_page(orig);
page = head + ((addr & ~PGDIR_MASK) >> PAGE_SHIFT);
- tail = page;
do {
VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
@@ -1273,12 +1253,6 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr,
return 0;
}
- while (refs--) {
- if (PageTail(tail))
- get_huge_page_tail(tail);
- tail++;
- }
-
return 1;
}