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| author | Jeff Garzik <jeff@garzik.org> | 2007-02-17 15:11:43 -0500 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-02-17 15:11:43 -0500 |
| commit | f630fe2817601314b2eb7ca5ddc23c7834646731 (patch) | |
| tree | 3bfb4939b7bbc3859575ca8b58fa3f929b015941 /include/asm-generic/pgtable.h | |
| parent | 48c871c1f6a7c7044dd76774fb469e65c7e2e4e8 (diff) | |
| parent | 8a03d9a498eaf02c8a118752050a5154852c13bf (diff) | |
Merge branch 'master' into upstream
Diffstat (limited to 'include/asm-generic/pgtable.h')
| -rw-r--r-- | include/asm-generic/pgtable.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 9d774d07d95..00c23433b39 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -183,6 +183,19 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres #endif /* + * A facility to provide batching of the reload of page tables with the + * actual context switch code for paravirtualized guests. By convention, + * only one of the lazy modes (CPU, MMU) should be active at any given + * time, entry should never be nested, and entry and exits should always + * be paired. This is for sanity of maintaining and reasoning about the + * kernel code. + */ +#ifndef __HAVE_ARCH_ENTER_LAZY_CPU_MODE +#define arch_enter_lazy_cpu_mode() do {} while (0) +#define arch_leave_lazy_cpu_mode() do {} while (0) +#endif + +/* * When walking page tables, get the address of the next boundary, * or the end address of the range if that comes earlier. Although no * vma end wraps to 0, rounded up __boundary may wrap to 0 throughout. |