commit 80217147a3d80c8a4e48f06e2f6e965455f3fe2a
author Martin Schwidefsky <schwidefsky@de.ibm.com> Mon Oct 25 16:10:11 2010 +0200
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> Mon Oct 25 16:10:15 2010 +0200
tree b419ae9ee3ab0e5b92c0ed2a30ff59b76d6a4978
parent 87799ebab760dd1460f6e4193d4f71ba416d1451

[S390] lockless get_user_pages_fast()

Implement get_user_pages_fast without locking in the fastpath on s390.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/pgtable.h

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 22a2945..785229a 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -316,6 +316,7 @@
 
 /* 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		    */