Merge tag 'iwlwifi-next-for-kalle-2014-12-30' of https://git.kernel.org/pub/scm/linux...

[cascardo/linux.git] / arch / sparc / include / asm / vio.h

diff --git a/arch/sparc/include/asm/vio.h b/arch/sparc/include/asm/vio.h
index fb124fe..8174f6c 100644 (file)
--- a/arch/sparc/include/asm/vio.h
+++ b/arch/sparc/include/asm/vio.h
@@ -300,6 +300,21 @@ static inline u32 vio_dring_avail(struct vio_dring_state *dr,
                ((dr->prod - dr->cons) & (ring_size - 1)) - 1);
 }
 
+static inline u32 vio_dring_next(struct vio_dring_state *dr, u32 index)
+{
+       if (++index == dr->num_entries)
+               index = 0;
+       return index;
+}
+
+static inline u32 vio_dring_prev(struct vio_dring_state *dr, u32 index)
+{
+       if (index == 0)
+               return dr->num_entries - 1;
+       else
+               return index - 1;
+}
+
 #define VIO_MAX_TYPE_LEN       32
 #define VIO_MAX_COMPAT_LEN     64