Merge ../linux-2.6

[safe/jmp/linux-2.6] / include / asm-sparc64 / futex.h

diff --git a/include/asm-sparc64/futex.h b/include/asm-sparc64/futex.h
index 0caf601..dee4020 100644 (file)
--- a/include/asm-sparc64/futex.h
+++ b/include/asm-sparc64/futex.h
@@ -20,7 +20,7 @@
        "4:     ba      3b\n"                           \
        "        mov    %5, %0\n"                       \
        "       .previous\n"                            \
-       "       .section __ex_table,#alloc\n"           \
+       "       .section __ex_table,\"a\"\n"            \
        "       .align  4\n"                            \
        "       .word   1b, 4b\n"                       \
        "       .word   2b, 4b\n"                       \
@@ -83,4 +83,28 @@ 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)
+{
+       __asm__ __volatile__(
+       "\n1:   lduwa   [%2] %%asi, %0\n"
+       "2:     casa    [%2] %%asi, %0, %1\n"
+       "3:\n"
+       "       .section .fixup,#alloc,#execinstr\n"
+       "       .align  4\n"
+       "4:     ba      3b\n"
+       "        mov    %3, %0\n"
+       "       .previous\n"
+       "       .section __ex_table,\"a\"\n"
+       "       .align  4\n"
+       "       .word   1b, 4b\n"
+       "       .word   2b, 4b\n"
+       "       .previous\n"
+       : "=&r" (oldval)
+       : "r" (newval), "r" (uaddr), "i" (-EFAULT)
+       : "memory");
+
+       return oldval;
+}
+
 #endif /* !(_SPARC64_FUTEX_H) */