diff --git a/arch/arm/mach-msm/include/mach/msm_smd.h b/arch/arm/mach-msm/include/mach/msm_smd.h
index bdf7731..aa076e4 100644
--- a/arch/arm/mach-msm/include/mach/msm_smd.h
+++ b/arch/arm/mach-msm/include/mach/msm_smd.h
@@ -38,6 +38,7 @@
 ** it will return the requested length written or an error.
 */
 int smd_write(smd_channel_t *ch, const void *data, int len);
+int smd_write_atomic(smd_channel_t *ch, const void *data, int len);
 
 int smd_write_avail(smd_channel_t *ch);
 int smd_read_avail(smd_channel_t *ch);