diff options
author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-22 12:50:35 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-22 12:50:35 -0700 |
commit | a489d159229fcc07bbb7566ac4fac745b79197ad (patch) | |
tree | ea7bcf20e845de8a96ccc1549799ac073fb28a84 /include/asm-s390/futex.h | |
parent | a48178a2fa17beee17d7e6aeaa6ed2db5813552d (diff) | |
parent | 388c571cffc4ae4e64f0786333e811308acbbc10 (diff) |
Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (44 commits)
[S390] hypfs crashes with invalid mount option.
[S390] cio: subchannel evaluation function operates without lock
[S390] cio: always query all paths on path verification.
[S390] cio: update path groups on logical CHPID changes.
[S390] cio: subchannels in no-path state.
[S390] Replace nopav-message on VM.
[S390] set modalias for ccw bus uevents.
[S390] Get rid of DBG macro.
[S390] Use alternative user-copy operations for new hardware.
[S390] Make user-copy operations run-time configurable.
[S390] Cleanup in signal handling code.
[S390] Cleanup in page table related code.
[S390] Linux API for writing z/VM APPLDATA Monitor records.
[S390] xpram off by one error.
[S390] Remove kexec experimental flag.
[S390] cleanup appldata.
[S390] fix typo in vmcp.
[S390] Kernel stack overflow handling.
[S390] qdio slsb processing state.
[S390] Missing initialization in common i/o layer.
...
Diffstat (limited to 'include/asm-s390/futex.h')
-rw-r--r-- | include/asm-s390/futex.h | 87 |
1 files changed, 7 insertions, 80 deletions
diff --git a/include/asm-s390/futex.h b/include/asm-s390/futex.h index ffedf14f89f..5e261e1de67 100644 --- a/include/asm-s390/futex.h +++ b/include/asm-s390/futex.h @@ -7,75 +7,21 @@ #include <asm/errno.h> #include <asm/uaccess.h> -#ifndef __s390x__ -#define __futex_atomic_fixup \ - ".section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 0b,4b,2b,4b,3b,4b\n" \ - ".previous" -#else /* __s390x__ */ -#define __futex_atomic_fixup \ - ".section __ex_table,\"a\"\n" \ - " .align 8\n" \ - " .quad 0b,4b,2b,4b,3b,4b\n" \ - ".previous" -#endif /* __s390x__ */ - -#define __futex_atomic_op(insn, ret, oldval, newval, uaddr, oparg) \ - asm volatile(" sacf 256\n" \ - "0: l %1,0(%6)\n" \ - "1: " insn \ - "2: cs %1,%2,0(%6)\n" \ - "3: jl 1b\n" \ - " lhi %0,0\n" \ - "4: sacf 0\n" \ - __futex_atomic_fixup \ - : "=d" (ret), "=&d" (oldval), "=&d" (newval), \ - "=m" (*uaddr) \ - : "0" (-EFAULT), "d" (oparg), "a" (uaddr), \ - "m" (*uaddr) : "cc" ); - static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr) { int op = (encoded_op >> 28) & 7; int cmp = (encoded_op >> 24) & 15; int oparg = (encoded_op << 8) >> 20; int cmparg = (encoded_op << 20) >> 20; - int oldval = 0, newval, ret; + int oldval, ret; + if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) oparg = 1 << oparg; if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; - inc_preempt_count(); - - switch (op) { - case FUTEX_OP_SET: - __futex_atomic_op("lr %2,%5\n", - ret, oldval, newval, uaddr, oparg); - break; - case FUTEX_OP_ADD: - __futex_atomic_op("lr %2,%1\nar %2,%5\n", - ret, oldval, newval, uaddr, oparg); - break; - case FUTEX_OP_OR: - __futex_atomic_op("lr %2,%1\nor %2,%5\n", - ret, oldval, newval, uaddr, oparg); - break; - case FUTEX_OP_ANDN: - __futex_atomic_op("lr %2,%1\nnr %2,%5\n", - ret, oldval, newval, uaddr, oparg); - break; - case FUTEX_OP_XOR: - __futex_atomic_op("lr %2,%1\nxr %2,%5\n", - ret, oldval, newval, uaddr, oparg); - break; - default: - ret = -ENOSYS; - } - - dec_preempt_count(); + ret = uaccess.futex_atomic_op(op, uaddr, oparg, &oldval); if (!ret) { switch (cmp) { @@ -91,32 +37,13 @@ static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr) return ret; } -static inline int -futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) +static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr, + int oldval, int newval) { - int ret; - if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; - asm volatile(" sacf 256\n" - " cs %1,%4,0(%5)\n" - "0: lr %0,%1\n" - "1: sacf 0\n" -#ifndef __s390x__ - ".section __ex_table,\"a\"\n" - " .align 4\n" - " .long 0b,1b\n" - ".previous" -#else /* __s390x__ */ - ".section __ex_table,\"a\"\n" - " .align 8\n" - " .quad 0b,1b\n" - ".previous" -#endif /* __s390x__ */ - : "=d" (ret), "+d" (oldval), "=m" (*uaddr) - : "0" (-EFAULT), "d" (newval), "a" (uaddr), "m" (*uaddr) - : "cc", "memory" ); - return oldval; + + return uaccess.futex_atomic_cmpxchg(uaddr, oldval, newval); } #endif /* __KERNEL__ */ |