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[S390] lockless get_user_pages_fast()

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Implement get_user_pages_fast without locking in the fastpath on s390.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2010-10-25 16:10:11 +02:00
committed by Martin Schwidefsky
parent 87799ebab7
commit 80217147a3
9 changed files with 395 additions and 28 deletions
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arch/s390/include/asm/pgtable.h
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@@ -316,6 +316,7 @@ extern unsigned long VMALLOC_START;
/* Bits in the segment table entry */
#define _SEGMENT_ENTRY_ORIGIN 0x7fffffc0UL /* page table origin */
#define _SEGMENT_ENTRY_RO 0x200 /* page protection bit */
#define _SEGMENT_ENTRY_INV 0x20 /* invalid segment table entry */
#define _SEGMENT_ENTRY_COMMON 0x10 /* common segment bit */
#define _SEGMENT_ENTRY_PTL 0x0f /* page table length */