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s390/mm: remove change bit override support 

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2014-09-22 08:50:51 +02:00 committed by Martin Schwidefsky
parent 70c9d29632
commit 6a5c1482e2
4 changed files with 6 additions and 13 deletions
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9
arch/s390/include/asm/pgtable.h
View File

@ -216,7 +216,6 @@ extern unsigned long MODULES_END;
*/
/* Hardware bits in the page table entry */
#define _PAGE_CO 0x100 /* HW Change-bit override */
#define _PAGE_PROTECT 0x200 /* HW read-only bit */
#define _PAGE_INVALID 0x400 /* HW invalid bit */
#define _PAGE_LARGE 0x800 /* Bit to mark a large pte */
@ -233,8 +232,8 @@ extern unsigned long MODULES_END;
#define __HAVE_ARCH_PTE_SPECIAL
/* Set of bits not changed in pte_modify */
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL | _PAGE_CO | \
_PAGE_DIRTY | _PAGE_YOUNG)
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL | _PAGE_DIRTY | \
_PAGE_YOUNG)
/*
* handle_pte_fault uses pte_present, pte_none and pte_file to find out the
@ -353,7 +352,6 @@ extern unsigned long MODULES_END;
#define _REGION3_ENTRY_LARGE 0x400 /* RTTE-format control, large page */
#define _REGION3_ENTRY_RO 0x200 /* page protection bit */
#define _REGION3_ENTRY_CO 0x100 /* change-recording override */
/* Bits in the segment table entry */
#define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL
@ -370,7 +368,6 @@ extern unsigned long MODULES_END;
#define _SEGMENT_ENTRY_YOUNG 0x1000 /* SW segment young bit */
#define _SEGMENT_ENTRY_SPLIT 0x0800 /* THP splitting bit */
#define _SEGMENT_ENTRY_LARGE 0x0400 /* STE-format control, large page */
#define _SEGMENT_ENTRY_CO 0x0100 /* change-recording override */
#define _SEGMENT_ENTRY_READ 0x0002 /* SW segment read bit */
#define _SEGMENT_ENTRY_WRITE 0x0001 /* SW segment write bit */
@ -887,8 +884,6 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pgste = pgste_set_pte(ptep, pgste, entry);
pgste_set_unlock(ptep, pgste);
} else {
if (!(pte_val(entry) & _PAGE_INVALID) && MACHINE_HAS_EDAT1)
pte_val(entry) |= _PAGE_CO;
*ptep = entry;
}
}

5
arch/s390/mm/dump_pagetables.c
View File

@ -54,7 +54,6 @@ static void print_prot(struct seq_file *m, unsigned int pr, int level)
return;
}
seq_printf(m, "%s", pr & _PAGE_PROTECT ? "RO " : "RW ");
seq_printf(m, "%s", pr & _PAGE_CO ? "CO " : " ");
seq_putc(m, '\n');
}
@ -129,7 +128,7 @@ static void walk_pte_level(struct seq_file *m, struct pg_state *st,
}
#ifdef CONFIG_64BIT
#define _PMD_PROT_MASK (_SEGMENT_ENTRY_PROTECT | _SEGMENT_ENTRY_CO)
#define _PMD_PROT_MASK _SEGMENT_ENTRY_PROTECT
#else
#define _PMD_PROT_MASK 0
#endif
@ -157,7 +156,7 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
}
#ifdef CONFIG_64BIT
#define _PUD_PROT_MASK (_REGION3_ENTRY_RO | _REGION3_ENTRY_CO)
#define _PUD_PROT_MASK _REGION3_ENTRY_RO
#else
#define _PUD_PROT_MASK 0
#endif

2
arch/s390/mm/hugetlbpage.c
View File

@ -88,7 +88,7 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pmd_val(pmd) &= ~_SEGMENT_ENTRY_ORIGIN;
pmd_val(pmd) |= pte_page(pte)[1].index;
} else
pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_CO;
pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE;
*(pmd_t *) ptep = pmd;
}

3
arch/s390/mm/vmem.c
View File

@ -236,8 +236,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
if (!new_page)
goto out;
pmd_val(*pm_dir) = __pa(new_page) |
_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE |
_SEGMENT_ENTRY_CO;
_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE;
address = (address + PMD_SIZE) & PMD_MASK;
continue;
}