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| author |   Zachary Amsden <zach@vmware.com> | 2006-12-07 02:14:09 +0100 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:09 +0100 |
| commit | 8ecb8950695e907ed25acffec9e98c6806e311c8 (patch) | |
| tree | dfa4a6cf29b1f6fe173a0d6998b3f3fb55b5422f /include/asm-i386/pgtable-3level.h | |
| parent | [PATCH] paravirt: fix parameter names in mmu operations (diff) | |
| download | linux-dev-8ecb8950695e907ed25acffec9e98c6806e311c8.tar.xz linux-dev-8ecb8950695e907ed25acffec9e98c6806e311c8.zip | |
[PATCH] paravirt: fix missing pte update
The function ptep_get_and_clear uses an atomic instruction sequence to get and
clear an active pte. Rather than add such an atomic operator to all virtual
machine implementations in paravirt-ops, it is easier to support the raw
atomic sequence and use either a trapping writable pagetable approach, or a
post-update notification. For the post update notification, we require the
pte_update function to be called after the access. Combine the 2-level and
3-level paging operators into one common function which does the post-update
notification, and rename the actual atomic sequences to raw_ptep_xxx
operators.
Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@muc.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'include/asm-i386/pgtable-3level.h')
| -rw-r--r-- | include/asm-i386/pgtable-3level.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/asm-i386/pgtable-3level.h b/include/asm-i386/pgtable-3level.h index 54287f148c74..7a2318f38303 100644 --- a/include/asm-i386/pgtable-3level.h +++ b/include/asm-i386/pgtable-3level.h @@ -119,8 +119,7 @@ static inline void pud_clear (pud_t * pud) { } #define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \ pmd_index(address)) -#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) +static inline pte_t raw_ptep_get_and_clear(pte_t *ptep) { pte_t res; |