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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-03-17 14:19:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 15:09:34 -0700
commit3ed3a4f0ddffece942bb2661924d87be4ce63cb7 (patch)
tree3b47bba0ba26a0301339f4989a57346e0f76b989 /mm/userfaultfd.c
parent5057dcd0f1aaad57e07e728ba20a99e205c6b9de (diff)
downloadlwn-3ed3a4f0ddffece942bb2661924d87be4ce63cb7.tar.gz
lwn-3ed3a4f0ddffece942bb2661924d87be4ce63cb7.zip
mm: cleanup *pte_alloc* interfaces
There are few things about *pte_alloc*() helpers worth cleaning up: - 'vma' argument is unused, let's drop it; - most __pte_alloc() callers do speculative check for pmd_none(), before taking ptl: let's introduce pte_alloc() macro which does the check. The only direct user of __pte_alloc left is userfaultfd, which has different expectation about atomicity wrt pmd. - pte_alloc_map() and pte_alloc_map_lock() are redefined using pte_alloc(). [sudeep.holla@arm.com: fix build for arm64 hugetlbpage] [sfr@canb.auug.org.au: fix arch/arm/mm/mmu.c some more] Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/userfaultfd.c')
-rw-r--r--mm/userfaultfd.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index 806b0c758c5b..9f3a0290b273 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -230,8 +230,7 @@ retry:
break;
}
if (unlikely(pmd_none(dst_pmdval)) &&
- unlikely(__pte_alloc(dst_mm, dst_vma, dst_pmd,
- dst_addr))) {
+ unlikely(__pte_alloc(dst_mm, dst_pmd, dst_addr))) {
err = -ENOMEM;
break;
}