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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2013-06-05 09:25:34 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-06-05 17:36:21 +0200 |
| commit | a8f6e7f7953d1baa05a346bf7cee44f1d022c63d (patch) | |
| tree | f2e13e105946dac24116a7eb34a93f26f48652c0 /arch/s390/include | |
| parent | s390/pgtable: Save pgste during modify_prot_start/commit (diff) | |
| download | linux-a8f6e7f7953d1baa05a346bf7cee44f1d022c63d.tar.xz linux-a8f6e7f7953d1baa05a346bf7cee44f1d022c63d.zip | |
s390/pgtable: make pgste lock an explicit barrier
Getting and Releasing the pgste lock has lock semantics. Make the
code an explicit barrier.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index f9a0a70dc936..e8b6e5b8932c 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -623,7 +623,7 @@ static inline pgste_t pgste_get_lock(pte_t *ptep) " csg %0,%1,%2\n" " jl 0b\n" : "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE]) - : "Q" (ptep[PTRS_PER_PTE]) : "cc"); + : "Q" (ptep[PTRS_PER_PTE]) : "cc", "memory"); #endif return __pgste(new); } @@ -635,7 +635,8 @@ static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste) " nihh %1,0xff7f\n" /* clear RCP_PCL_BIT */ " stg %1,%0\n" : "=Q" (ptep[PTRS_PER_PTE]) - : "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE]) : "cc"); + : "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE]) + : "cc", "memory"); preempt_enable(); #endif } |