Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sh / include / asm / atomic-irq.h

diff --git a/kernel/arch/sh/include/asm/atomic-irq.h b/kernel/arch/sh/include/asm/atomic-irq.h
new file mode 100644 (file)
index 0000000..61d1075
--- /dev/null
+++ b/kernel/arch/sh/include/asm/atomic-irq.h
@@ -0,0 +1,63 @@
+#ifndef __ASM_SH_ATOMIC_IRQ_H
+#define __ASM_SH_ATOMIC_IRQ_H
+
+#include <linux/irqflags.h>
+
+/*
+ * To get proper branch prediction for the main line, we must branch
+ * forward to code at the end of this object's .text section, then
+ * branch back to restart the operation.
+ */
+
+#define ATOMIC_OP(op, c_op)                                            \
+static inline void atomic_##op(int i, atomic_t *v)                     \
+{                                                                      \
+       unsigned long flags;                                            \
+                                                                       \
+       raw_local_irq_save(flags);                                      \
+       v->counter c_op i;                                              \
+       raw_local_irq_restore(flags);                                   \
+}
+
+#define ATOMIC_OP_RETURN(op, c_op)                                     \
+static inline int atomic_##op##_return(int i, atomic_t *v)             \
+{                                                                      \
+       unsigned long temp, flags;                                      \
+                                                                       \
+       raw_local_irq_save(flags);                                      \
+       temp = v->counter;                                              \
+       temp c_op i;                                                    \
+       v->counter = temp;                                              \
+       raw_local_irq_restore(flags);                                   \
+                                                                       \
+       return temp;                                                    \
+}
+
+#define ATOMIC_OPS(op, c_op) ATOMIC_OP(op, c_op) ATOMIC_OP_RETURN(op, c_op)
+
+ATOMIC_OPS(add, +=)
+ATOMIC_OPS(sub, -=)
+
+#undef ATOMIC_OPS
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
+
+static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
+{
+       unsigned long flags;
+
+       raw_local_irq_save(flags);
+       v->counter &= ~mask;
+       raw_local_irq_restore(flags);
+}
+
+static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
+{
+       unsigned long flags;
+
+       raw_local_irq_save(flags);
+       v->counter |= mask;
+       raw_local_irq_restore(flags);
+}
+
+#endif /* __ASM_SH_ATOMIC_IRQ_H */