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author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-10-22 12:52:47 +0200 |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-10-22 12:52:49 +0200 |
commit | 3610cce87af0693603db171d5b6f6735f5e3dc5b (patch) | |
tree | 9aa7d9a0924b2f075c1b95ed57bb63ed512165c9 /arch/s390/mm/vmem.c | |
parent | e4aa402e7a3b6b87d8df6243a37171cdcd2f01c2 (diff) | |
download | linux-3.10-3610cce87af0693603db171d5b6f6735f5e3dc5b.tar.gz linux-3.10-3610cce87af0693603db171d5b6f6735f5e3dc5b.tar.bz2 linux-3.10-3610cce87af0693603db171d5b6f6735f5e3dc5b.zip |
[S390] Cleanup page table definitions.
- De-confuse the defines for the address-space-control-elements
and the segment/region table entries.
- Create out of line functions for page table allocation / freeing.
- Simplify get_shadow_xxx functions.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/vmem.c')
-rw-r--r-- | arch/s390/mm/vmem.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index fd594d5fe14..1bd51d84048 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -75,29 +75,24 @@ static void __init_refok *vmem_alloc_pages(unsigned int order) static inline pmd_t *vmem_pmd_alloc(void) { - pmd_t *pmd; - int i; + pmd_t *pmd = NULL; - pmd = vmem_alloc_pages(PMD_ALLOC_ORDER); +#ifdef CONFIG_64BIT + pmd = vmem_alloc_pages(2); if (!pmd) return NULL; - for (i = 0; i < PTRS_PER_PMD; i++) - pmd_clear_kernel(pmd + i); + clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE*4); +#endif return pmd; } static inline pte_t *vmem_pte_alloc(void) { - pte_t *pte; - pte_t empty_pte; - int i; + pte_t *pte = vmem_alloc_pages(0); - pte = vmem_alloc_pages(PTE_ALLOC_ORDER); if (!pte) return NULL; - pte_val(empty_pte) = _PAGE_TYPE_EMPTY; - for (i = 0; i < PTRS_PER_PTE; i++) - pte[i] = empty_pte; + clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY, PAGE_SIZE); return pte; } |