aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJeremy Fitzhardinge <jeremy@goop.org>2007-05-02 19:27:15 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:15 +0200
commit4cdd9c8931767e1c56a51a1078d33a8c340f4405 (patch)
treebf8b49009011bb2dffe9683dffdcbfe3b90375f9
parent1a45b7aaa5051489b46afbc48509bd91f8b4a1ba (diff)
downloadlinux-2.6.34-ux500-4cdd9c8931767e1c56a51a1078d33a8c340f4405.tar.gz
[PATCH] i386: PARAVIRT: drop unused ptep_get_and_clear
In shadow mode hypervisors, ptep_get_and_clear achieves the desired purpose of keeping the shadows in sync by issuing a native_get_and_clear, followed by a call to pte_update, which indicates the PTE has been modified. Direct mode hypervisors (Xen) have no need for this anyway, and will trap the update using writable pagetables. This means no hypervisor makes use of ptep_get_and_clear; there is no reason to have it in the paravirt-ops structure. Change confusing terminology about raw vs. native functions into consistent use of native_pte_xxx for operations which do not invoke paravirt-ops. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andi Kleen <ak@suse.de>
-rw-r--r--arch/i386/kernel/paravirt.c2
-rw-r--r--include/asm-i386/paravirt.h13
-rw-r--r--include/asm-i386/pgtable.h4
3 files changed, 2 insertions, 17 deletions
diff --git a/arch/i386/kernel/paravirt.c b/arch/i386/kernel/paravirt.c
index 596f382c641..c4850ddd6a9 100644
--- a/arch/i386/kernel/paravirt.c
+++ b/arch/i386/kernel/paravirt.c
@@ -315,8 +315,6 @@ struct paravirt_ops paravirt_ops = {
.pte_update = paravirt_nop,
.pte_update_defer = paravirt_nop,
- .ptep_get_and_clear = native_ptep_get_and_clear,
-
#ifdef CONFIG_HIGHPTE
.kmap_atomic_pte = kmap_atomic,
#endif
diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h
index 2ba18963e11..e2e7f98723c 100644
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -188,8 +188,6 @@ struct paravirt_ops
void (*pte_update_defer)(struct mm_struct *mm,
unsigned long addr, pte_t *ptep);
- pte_t (*ptep_get_and_clear)(pte_t *ptep);
-
#ifdef CONFIG_HIGHPTE
void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
#endif
@@ -859,12 +857,8 @@ static inline void pmd_clear(pmd_t *pmdp)
PVOP_VCALL1(pmd_clear, pmdp);
}
-static inline pte_t raw_ptep_get_and_clear(pte_t *p)
-{
- unsigned long long val = PVOP_CALL1(unsigned long long, ptep_get_and_clear, p);
- return (pte_t) { val, val >> 32 };
-}
#else /* !CONFIG_X86_PAE */
+
static inline pte_t __pte(unsigned long val)
{
return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) };
@@ -900,11 +894,6 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd);
}
-
-static inline pte_t raw_ptep_get_and_clear(pte_t *p)
-{
- return (pte_t) { PVOP_CALL1(unsigned long, ptep_get_and_clear, p) };
-}
#endif /* CONFIG_X86_PAE */
#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index befc697821e..e7ddd234130 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -267,8 +267,6 @@ extern void vmalloc_sync_all(void);
*/
#define pte_update(mm, addr, ptep) do { } while (0)
#define pte_update_defer(mm, addr, ptep) do { } while (0)
-
-#define raw_ptep_get_and_clear(xp) native_ptep_get_and_clear(xp)
#endif
/*
@@ -335,7 +333,7 @@ do { \
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- pte_t pte = raw_ptep_get_and_clear(ptep);
+ pte_t pte = native_ptep_get_and_clear(ptep);
pte_update(mm, addr, ptep);
return pte;
}