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powerpc: Use RCU based pte freeing mechanism for all powerpc

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Refactor the RCU based pte free code that was used on ppc64 to be used
on all powerpc.

Additionally refactor pte_free() & pte_free_kernel() into common code
between ppc32 & ppc64.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Kumar Gala
2008-11-19 12:50:04 +00:00
committed by Paul Mackerras
parent df3b861155
commit 0186f47e70
8 changed files with 167 additions and 175 deletions
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41
arch/powerpc/include/asm/pgalloc.h
View File

@ -2,11 +2,52 @@
#define _ASM_POWERPC_PGALLOC_H
#ifdef __KERNEL__
#include <linux/mm.h>
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pgtable_page_dtor(ptepage);
__free_page(ptepage);
}
typedef struct pgtable_free {
unsigned long val;
} pgtable_free_t;
#define PGF_CACHENUM_MASK 0x7
static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
unsigned long mask)
{
BUG_ON(cachenum > PGF_CACHENUM_MASK);
return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
}
#ifdef CONFIG_PPC64
#include <asm/pgalloc-64.h>
#else
#include <asm/pgalloc-32.h>
#endif
extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
#ifdef CONFIG_SMP
#define __pte_free_tlb(tlb,ptepage) \
do { \
pgtable_page_dtor(ptepage); \
pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
} while (0)
#else
#define __pte_free_tlb(tlb, pte) pte_free((tlb)->mm, (pte))
#endif
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_PGALLOC_H */