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Diffstat (limited to 'sysdeps/unix/sysv/linux/sh/atomic-machine.h')
-rw-r--r--sysdeps/unix/sysv/linux/sh/atomic-machine.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sh/atomic-machine.h b/sysdeps/unix/sysv/linux/sh/atomic-machine.h
index 3c58b70c02..5a7e953ac4 100644
--- a/sysdeps/unix/sysv/linux/sh/atomic-machine.h
+++ b/sysdeps/unix/sysv/linux/sh/atomic-machine.h
@@ -47,6 +47,9 @@ typedef uintmax_t uatomic_max_t;
 #define __HAVE_64B_ATOMICS 0
 #define USE_ATOMIC_COMPILER_BUILTINS 0
 
+/* XXX Is this actually correct?  */
+#define ATOMIC_EXCHANGE_USES_CAS 1
+
 /* SH kernel has implemented a gUSA ("g" User Space Atomicity) support
    for the user space atomicity. The atomicity macros use this scheme.