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Date: Wed, 13 Jun 2012 11:20:45 +0100
From: David Vrabel <david.vrabel@...rix.com>
To: xen-devel@...ts.xensource.com
CC: "David Vrabel" <david.vrabel@...rix.com>,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] x86/mm: remove arch-specific pmdp_get_and_clear() function
From: David Vrabel <david.vrabel@...rix.com>
Similar to the removal of the x86 specific ptep_get_and_clear(), do
the same for pmdp_get_and_clear(). The reasoning for this is the
same.
Signed-off-by: David Vrabel <david.vrabel@...rix.com>
---
arch/x86/include/asm/pgtable-2level.h | 9 ---------
arch/x86/include/asm/pgtable-3level.h | 23 -----------------------
arch/x86/include/asm/pgtable.h | 17 -----------------
arch/x86/include/asm/pgtable_64.h | 13 -------------
4 files changed, 0 insertions(+), 62 deletions(-)
diff --git a/arch/x86/include/asm/pgtable-2level.h b/arch/x86/include/asm/pgtable-2level.h
index be7c20e..9b08339 100644
--- a/arch/x86/include/asm/pgtable-2level.h
+++ b/arch/x86/include/asm/pgtable-2level.h
@@ -37,15 +37,6 @@ static inline void native_pte_clear(struct mm_struct *mm,
*xp = native_make_pte(0);
}
-#ifdef CONFIG_SMP
-static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
-{
- return __pmd(xchg((pmdval_t *)xp, 0));
-}
-#else
-#define native_pmdp_get_and_clear(xp) native_local_pmdp_get_and_clear(xp)
-#endif
-
/*
* Bits _PAGE_BIT_PRESENT, _PAGE_BIT_FILE and _PAGE_BIT_PROTNONE are taken,
* split up the 29 bits of offset into this range:
diff --git a/arch/x86/include/asm/pgtable-3level.h b/arch/x86/include/asm/pgtable-3level.h
index 42101e9..f081699 100644
--- a/arch/x86/include/asm/pgtable-3level.h
+++ b/arch/x86/include/asm/pgtable-3level.h
@@ -133,29 +133,6 @@ static inline void pud_clear(pud_t *pudp)
*/
}
-#ifdef CONFIG_SMP
-union split_pmd {
- struct {
- u32 pmd_low;
- u32 pmd_high;
- };
- pmd_t pmd;
-};
-static inline pmd_t native_pmdp_get_and_clear(pmd_t *pmdp)
-{
- union split_pmd res, *orig = (union split_pmd *)pmdp;
-
- /* xchg acts as a barrier before setting of the high bits */
- res.pmd_low = xchg(&orig->pmd_low, 0);
- res.pmd_high = orig->pmd_high;
- orig->pmd_high = 0;
-
- return res.pmd;
-}
-#else
-#define native_pmdp_get_and_clear(xp) native_local_pmdp_get_and_clear(xp)
-#endif
-
/*
* Bits 0, 6 and 7 are taken in the low part of the pte,
* put the 32 bits of offset into the high part.
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 4413bed..34f576c 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -598,14 +598,6 @@ static inline int pgd_none(pgd_t pgd)
extern int direct_gbpages;
-static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
-{
- pmd_t res = *pmdp;
-
- native_pmd_clear(pmdp);
- return res;
-}
-
static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep , pte_t pte)
{
@@ -694,15 +686,6 @@ static inline int pmd_write(pmd_t pmd)
return pmd_flags(pmd) & _PAGE_RW;
}
-#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
-static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
- pmd_t *pmdp)
-{
- pmd_t pmd = native_pmdp_get_and_clear(pmdp);
- pmd_update(mm, addr, pmdp);
- return pmd;
-}
-
#define __HAVE_ARCH_PMDP_SET_WRPROTECT
static inline void pmdp_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp)
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index cc12d27..92eb013 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -69,19 +69,6 @@ static inline void native_pmd_clear(pmd_t *pmd)
native_set_pmd(pmd, native_make_pmd(0));
}
-static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
-{
-#ifdef CONFIG_SMP
- return native_make_pmd(xchg(&xp->pmd, 0));
-#else
- /* native_local_pmdp_get_and_clear,
- but duplicated because of cyclic dependency */
- pmd_t ret = *xp;
- native_pmd_clear(xp);
- return ret;
-#endif
-}
-
static inline void native_set_pud(pud_t *pudp, pud_t pud)
{
*pudp = pud;
--
1.7.2.5
--
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