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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-07-12 16:39:55 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-07-12 16:39:55 +0200 |
| commit | 13492c50f69bdf60a42debc6bd3ec49cc1dc941e (patch) | |
| tree | aba4230d71ff565ba994a75c0beeb1073c89891b /include/asm-s390/futex.h | |
| parent | [S390] subchannel register/unregister mutex. (diff) | |
| download | linux-13492c50f69bdf60a42debc6bd3ec49cc1dc941e.tar.xz linux-13492c50f69bdf60a42debc6bd3ec49cc1dc941e.zip | |
[S390] fix futex_atomic_cmpxchg_inatomic
futex_atomic_cmpxchg_inatomic has the same bug as the other
atomic futex operations: the operation needs to be done in the
user address space, not the kernel address space. Add the missing
sacf 256 & sacf 0.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/asm-s390/futex.h')
| -rw-r--r-- | include/asm-s390/futex.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/asm-s390/futex.h b/include/asm-s390/futex.h index 1802775568b9..ffedf14f89f6 100644 --- a/include/asm-s390/futex.h +++ b/include/asm-s390/futex.h @@ -98,9 +98,10 @@ futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; - asm volatile(" cs %1,%4,0(%5)\n" + asm volatile(" sacf 256\n" + " cs %1,%4,0(%5)\n" "0: lr %0,%1\n" - "1:\n" + "1: sacf 0\n" #ifndef __s390x__ ".section __ex_table,\"a\"\n" " .align 4\n" |