fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-s390 / futex.h

diff --git a/include/asm-s390/futex.h b/include/asm-s390/futex.h
index 1802775..5c5d02d 100644 (file)
--- a/include/asm-s390/futex.h
+++ b/include/asm-s390/futex.h
@@ -4,36 +4,8 @@
 #ifdef __KERNEL__
 
 #include <linux/futex.h>
+#include <linux/uaccess.h>
 #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)
 {
@@ -41,41 +13,17 @@ static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
        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();
+       pagefault_disable();
+       ret = uaccess.futex_atomic_op(op, uaddr, oparg, &oldval);
+       pagefault_enable();
 
        if (!ret) {
                switch (cmp) {
@@ -91,31 +39,13 @@ 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("   cs   %1,%4,0(%5)\n"
-                    "0: lr   %0,%1\n"
-                    "1:\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__ */