linux-kernel - [PATCH 4.9 061/148] mm: drop unused pmdp_huge_get_and_clear

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Date:   Tue, 12 Dec 2017 13:44:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jack Wang <jinpu.wang@...fitbricks.com>
Subject: [PATCH 4.9 061/148] mm: drop unused pmdp_huge_get_and_clear_notify()

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

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@...ux.intel.com>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: <stable@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
[jwang: adjust context for 4.9]
Signed-off-by: Jack Wang <jinpu.wang@...fitbricks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 include/linux/mmu_notifier.h |   13 -------------
 1 file changed, 13 deletions(-)

--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -381,18 +381,6 @@ static inline void mmu_notifier_mm_destr
 	___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
@@ -480,7 +468,6 @@ static inline void mmu_notifier_mm_destr
 #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 */