Commit-ID:  9b718e758ac91f28b6cdd354ad5ee9c767daae74
Gitweb:     http://git.kernel.org/tip/9b718e758ac91f28b6cdd354ad5ee9c767daae74
Author:     Ingo Molnar <[email protected]>
AuthorDate: Sun, 28 Oct 2012 14:10:14 +0100
Committer:  Ingo Molnar <[email protected]>
CommitDate: Sun, 28 Oct 2012 17:31:21 +0100

sched, numa, mm, s390/thp: Add pmd_mknotpresent()

We'd like to make use of pmd_mknotpresent() in mm/, but
not all architectures have it. This patch adds the s390
version.

Signed-off-by: Ingo Molnar <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Gerald Schaefer <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
---
 arch/s390/include/asm/pgtable.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 098fc5a..b820ff1 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1310,6 +1310,12 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd)
        return pmd;
 }
 
+static inline pmd_t pmd_mknotpresent(pmd_t pmd)
+{
+       pmd_val(pmd) &= ~_SEGMENT_ENTRY_ORIGIN;
+       return pmd;
+}
+
 #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
 static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
                                            unsigned long address, pmd_t *pmdp)
--
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