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authorDavid S. Miller <davem@davemloft.net>2017-03-15 11:59:10 -0700
committerDavid S. Miller <davem@davemloft.net>2017-03-15 11:59:10 -0700
commit101c431492d297dd0d111b461d8d324895676bee (patch)
tree06d8a02a4fd91acdd6c31340452e85feaac4ecb7 /mm/mremap.c
parent9c79ddaa0f962d1f26537a670b0652ff509a6fe0 (diff)
parent95422dec6bd4a7c57444743f7b1bb375335a6298 (diff)
downloadlinux-101c431492d297dd0d111b461d8d324895676bee.tar.gz
linux-101c431492d297dd0d111b461d8d324895676bee.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: drivers/net/ethernet/broadcom/genet/bcmgenet.c net/core/sock.c Conflicts were overlapping changes in bcmgenet and the lockdep handling of sockets. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'mm/mremap.c')
-rw-r--r--mm/mremap.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/mm/mremap.c b/mm/mremap.c
index 8233b0105c82..cd8a1b199ef9 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -32,6 +32,7 @@
static pmd_t *get_old_pmd(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
+ p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
@@ -39,7 +40,11 @@ static pmd_t *get_old_pmd(struct mm_struct *mm, unsigned long addr)
if (pgd_none_or_clear_bad(pgd))
return NULL;
- pud = pud_offset(pgd, addr);
+ p4d = p4d_offset(pgd, addr);
+ if (p4d_none_or_clear_bad(p4d))
+ return NULL;
+
+ pud = pud_offset(p4d, addr);
if (pud_none_or_clear_bad(pud))
return NULL;
@@ -54,11 +59,15 @@ static pmd_t *alloc_new_pmd(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long addr)
{
pgd_t *pgd;
+ p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
pgd = pgd_offset(mm, addr);
- pud = pud_alloc(mm, pgd, addr);
+ p4d = p4d_alloc(mm, pgd, addr);
+ if (!p4d)
+ return NULL;
+ pud = pud_alloc(mm, p4d, addr);
if (!pud)
return NULL;