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| author | Yinghai Lu <yinghai@kernel.org> | 2012-11-16 19:38:38 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-17 11:59:00 -0800 |
| commit | fa62aafea9e415cd1efd8c4054106112fe809f19 (patch) | |
| tree | e85d6b6e3bd59bd4ffa8d055d065bbc6f38b694f /arch/x86/include/asm/pgtable.h | |
| parent | f4a75d2eb7b1e2206094b901be09adb31ba63681 (diff) | |
| download | op-kernel-dev-fa62aafea9e415cd1efd8c4054106112fe809f19.zip op-kernel-dev-fa62aafea9e415cd1efd8c4054106112fe809f19.tar.gz | |
x86, mm: Add global page_size_mask and probe one time only
Now we pass around use_gbpages and use_pse for calculating page table size,
Later we will need to call init_memory_mapping for every ram range one by one,
that mean those calculation will be done several times.
Those information are the same for all ram range and could be stored in
page_size_mask and could be probed it one time only.
Move that probing code out of init_memory_mapping into separated function
probe_page_size_mask(), and call it before all init_memory_mapping.
Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-2-git-send-email-yinghai@kernel.org
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/pgtable.h')
| -rw-r--r-- | arch/x86/include/asm/pgtable.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index a1f780d..98ac76d 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -602,6 +602,7 @@ static inline int pgd_none(pgd_t pgd) #ifndef __ASSEMBLY__ extern int direct_gbpages; +void probe_page_size_mask(void); /* local pte updates need not use xchg for locking */ static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
