mm: drop unused pmdp_huge_get_and_clear_notify()

commit c0c379e2931b05facef538e53bf3b21f283d9a0b upstream.

Dave noticed that after fixing MADV_DONTNEED vs numa balancing race the
last pmdp_huge_get_and_clear_notify() user is gone.

Let's drop the helper.

Link: http://lkml.kernel.org/r/20170306112047.24809-1-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[jwang: adjust context for 4.4]
Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index a1a210d59961a855964b03ee9a7eae7c74d7c86f..38c5eb21883ebfcfc1ce5a007fc22106ed5ed3e8 100644 (file)
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -381,18 +381,6 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm)
        ___pmd;                                                         \
 })
 
-#define pmdp_huge_get_and_clear_notify(__mm, __haddr, __pmd)           \
-({                                                                     \
-       unsigned long ___haddr = __haddr & HPAGE_PMD_MASK;              \
-       pmd_t ___pmd;                                                   \
-                                                                       \
-       ___pmd = pmdp_huge_get_and_clear(__mm, __haddr, __pmd);         \
-       mmu_notifier_invalidate_range(__mm, ___haddr,                   \
-                                     ___haddr + HPAGE_PMD_SIZE);       \
-                                                                       \
-       ___pmd;                                                         \
-})
-
 /*
  * set_pte_at_notify() sets the pte _after_ running the notifier.
  * This is safe to start by updating the secondary MMUs, because the primary MMU
@@ -475,7 +463,6 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm)
 #define pmdp_clear_young_notify pmdp_test_and_clear_young
 #define        ptep_clear_flush_notify ptep_clear_flush
 #define pmdp_huge_clear_flush_notify pmdp_huge_clear_flush
-#define pmdp_huge_get_and_clear_notify pmdp_huge_get_and_clear
 #define set_pte_at_notify set_pte_at
 
 #endif /* CONFIG_MMU_NOTIFIER */