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authorHeiko Carstens <heiko.carstens@de.ibm.com>2014-09-22 10:50:51 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-09-25 12:52:09 +0400
commit6a5c1482e2b700e89f174ddb42434b37f15abccd (patch)
tree4c3e6377eb173f1b7dc0d003de93f9063766a507 /arch/s390/include/asm/pgtable.h
parent70c9d296325b398a87c30de77cc94033a60bdad2 (diff)
downloadlinux-6a5c1482e2b700e89f174ddb42434b37f15abccd.tar.xz
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>
Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
-rw-r--r--arch/s390/include/asm/pgtable.h9
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 5efb2fe186e7..7c4af56f2b73 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -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;
}
}