From: Marc Zyngier <maz@xxxxxxxxxxxxxxx>
Date: Tue, 28 Mar 2006 19:24:58 +0200
> The included patchlet fixes a compilation problem on sparc64 in the
> last batch of patches included in Linus' repository.
I tried to send the proper fix, attached below, to Linus
already. I'll resend it today if he hasn't taken it yet.
diff-tree 6e57a3a89785692bd8d012d80f5ee210ab8e0b68 (from 329b10bb0feacb7fb9a41389313ff0a51ae56f2a)
Author: David S. Miller <davem@xxxxxxxxxxxxxxxxxxxx>
Date: Tue Mar 28 01:00:08 2006 -0800
[SPARC64]: Implement futex_atomic_cmpxchg_inatomic().
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
diff --git a/include/asm-sparc64/futex.h b/include/asm-sparc64/futex.h
index cd340a2..dee4020 100644
--- a/include/asm-sparc64/futex.h
+++ b/include/asm-sparc64/futex.h
@@ -84,9 +84,27 @@ static inline int futex_atomic_op_inuser
}
static inline int
-futex_atomic_cmpxchg_inuser(int __user *uaddr, int oldval, int newval)
+futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
{
- return -ENOSYS;
+ __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) */
-
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