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mn10300: drop _PAGE_FILE and pte_file()-related helpers 

We've replaced remap_file_pages(2) implementation with emulation.  Nobody
creates non-linear mapping anymore.

This patch also increases the number of bits availble for swap offset.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2015-02-10 14:10:53 -08:00 committed by Linus Torvalds
parent b32da82e28
commit 6bf63a8ccb
1 changed files with 3 additions and 14 deletions
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17
arch/mn10300/include/asm/pgtable.h
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@ -134,7 +134,6 @@ extern pte_t kernel_vmalloc_ptes[(VMALLOC_END - VMALLOC_START) / PAGE_SIZE];
#define _PAGE_NX 0 /* no-execute bit */
/* If _PAGE_VALID is clear, we use these: */
#define _PAGE_FILE xPTEL2_C /* set:pagecache unset:swap */
#define _PAGE_PROTNONE 0x000 /* If not present */
#define __PAGE_PROT_UWAUX 0x010
@ -241,11 +240,6 @@ static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
static inline int pte_write(pte_t pte) { return pte_val(pte) & __PAGE_PROT_WRITE; }
static inline int pte_special(pte_t pte){ return 0; }
/*
* The following only works if pte_present() is not true.
*/
static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
static inline pte_t pte_rdprotect(pte_t pte)
{
pte_val(pte) &= ~(__PAGE_PROT_USER|__PAGE_PROT_UWAUX); return pte;
@ -338,16 +332,11 @@ static inline int pte_exec_kernel(pte_t pte)
return 1;
}
#define PTE_FILE_MAX_BITS 30
#define pte_to_pgoff(pte) (pte_val(pte) >> 2)
#define pgoff_to_pte(off) __pte((off) << 2 | _PAGE_FILE)
/* Encode and de-code a swap entry */
#define __swp_type(x) (((x).val >> 2) & 0x3f)
#define __swp_offset(x) ((x).val >> 8)
#define __swp_type(x) (((x).val >> 1) & 0x3f)
#define __swp_offset(x) ((x).val >> 7)
#define __swp_entry(type, offset) \
((swp_entry_t) { ((type) << 2) | ((offset) << 8) })
((swp_entry_t) { ((type) << 1) | ((offset) << 7) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) __pte((x).val)