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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-03-17 16:37:14 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-24 23:57:31 +0200 |
| commit | 85958b465c2e0de315575b1d3d7e7c2ce7126880 (patch) | |
| tree | c1d6a062bf74b8e172757f4f4259ac567043b8a1 /include/asm-x86/pgtable.h | |
| parent | 68db065c845bd9d0eb96946ab104b4c82d0ae9da (diff) | |
| download | lwn-85958b465c2e0de315575b1d3d7e7c2ce7126880.tar.gz lwn-85958b465c2e0de315575b1d3d7e7c2ce7126880.zip | |
x86: unify pgd ctor/dtor
All pagetables need fundamentally the same setup and destruction, so
just use the same code for everything.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/pgtable.h')
| -rw-r--r-- | include/asm-x86/pgtable.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index e61075e70a54..b8a08bd7bd48 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -438,6 +438,22 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, pte_update(mm, addr, ptep); } +/* + * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); + * + * dst - pointer to pgd range anwhere on a pgd page + * src - "" + * count - the number of pgds to copy. + * + * dst and src can be on the same page, but the range must not overlap, + * and must not cross a page boundary. + */ +static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) +{ + memcpy(dst, src, count * sizeof(pgd_t)); +} + + #include <asm-generic/pgtable.h> #endif /* __ASSEMBLY__ */ |