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authorZachary Amsden <zach@vmware.com>2006-10-01 02:29:31 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 03:39:33 -0400
commit9888a1cae3f859db38b9604e3df1c02177161bb0 (patch)
tree5954dc5e1a2dc1251a57a41aa15b7776a530f230 /include/asm-generic/pgtable.h
parent3dc907951446b9317b1887223caa4e083390de9f (diff)
[PATCH] paravirt: pte clear not present
Change pte_clear_full to a more appropriately named pte_clear_not_present, allowing optimizations when not-present mapping changes need not be reflected in the hardware TLB for protected page table modes. There is also another case that can use it in the fremap code. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-generic/pgtable.h')
-rw-r--r--include/asm-generic/pgtable.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 349260cd86ed..78740716c9e7 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -112,8 +112,13 @@ do { \
112}) 112})
113#endif 113#endif
114 114
115#ifndef __HAVE_ARCH_PTE_CLEAR_FULL 115/*
116#define pte_clear_full(__mm, __address, __ptep, __full) \ 116 * Some architectures may be able to avoid expensive synchronization
117 * primitives when modifications are made to PTE's which are already
118 * not present, or in the process of an address space destruction.
119 */
120#ifndef __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
121#define pte_clear_not_present_full(__mm, __address, __ptep, __full) \
117do { \ 122do { \
118 pte_clear((__mm), (__address), (__ptep)); \ 123 pte_clear((__mm), (__address), (__ptep)); \
119} while (0) 124} while (0)