Commit f9c79bf4 authored by Russell King's avatar Russell King

[ARM] Make ARM work with rmap

ARM can use the generic rmap.h.  It doesn't need its own version.
parent c28ac96b
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#ifndef _ARMV_RMAP_H
#define _ARMV_RMAP_H
/*
* linux/include/asm-arm/proc-armv/rmap.h
*
* Architecture dependant parts of the reverse mapping code,
*
* ARM is different since hardware page tables are smaller than
* the page size and Linux uses a "duplicate" one with extra info.
* For rmap this means that the first 2 kB of a page are the hardware
* page tables and the last 2 kB are the software page tables.
*/
static inline void pgtable_add_rmap(pte_t * ptep, struct mm_struct * mm, unsigned long address)
{
struct page * page = virt_to_page(ptep);
page->mm = mm;
page->index = address & ~((PTRS_PER_PTE * PAGE_SIZE) - 1);
inc_page_state(nr_page_table_pages);
}
static inline void pgtable_remove_rmap(pte_t * ptep)
{
struct page * page = virt_to_page(ptep);
page->mm = NULL;
page->index = 0;
dec_page_state(nr_page_table_pages);
}
static inline struct mm_struct * ptep_to_mm(pte_t * ptep)
{
struct page * page = virt_to_page(ptep);
return page->mm;
}
/* The page table takes half of the page */
#define PTE_MASK ((PAGE_SIZE / 2) - 1)
static inline unsigned long ptep_to_address(pte_t * ptep)
{
struct page * page = virt_to_page(ptep);
unsigned long low_bits;
low_bits = ((unsigned long)ptep & PTE_MASK) * PTRS_PER_PTE;
return page->index + low_bits;
}
#endif /* _ARMV_RMAP_H */
#ifndef _ARM_RMAP_H #ifndef _ARM_RMAP_H
#define _ARM_RMAP_H #define _ARM_RMAP_H
#include <asm/proc/rmap.h> #include <asm-generic/rmap.h>
#endif /* _ARM_RMAP_H */ #endif /* _ARM_RMAP_H */
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