diff --git a/sys/alpha/include/bus.h b/sys/alpha/include/bus.h
index 1810c4b53063..7fe2726736a9 100644
--- a/sys/alpha/include/bus.h
+++ b/sys/alpha/include/bus.h
@@ -364,18 +364,6 @@ void busspace_generic_barrier(struct alpha_busspace *space,
 #define bus_space_barrier(t, h, o, l, f) \
 	(t)->ab_ops->abo_barrier(t, (h)+(o), l, f)
 
-#define barrier_read \
-	bus_space_barrier(busspace_isa_mem, 0, BUS_SPACE_UNRESTRICTED,	\
-	    BUS_SPACE_BARRIER_READ)
-
-#define barrier_write \
-	bus_space_barrier(busspace_isa_mem, 0, BUS_SPACE_UNRESTRICTED,	\
-	    BUS_SPACE_BARRIER_WRITE)
-
-#define barrier_rw \
-	bus_space_barrier(busspace_isa_mem, 0, BUS_SPACE_UNRESTRICTED,	\
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE)
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/amd64/include/bus_amd64.h b/sys/amd64/include/bus_amd64.h
index 3423e6b1ad4f..9f036b605ee7 100644
--- a/sys/amd64/include/bus_amd64.h
+++ b/sys/amd64/include/bus_amd64.h
@@ -1152,30 +1152,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 		__asm __volatile("" : : : "memory");
 }
 	
-
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/amd64/include/bus_at386.h b/sys/amd64/include/bus_at386.h
index 3423e6b1ad4f..9f036b605ee7 100644
--- a/sys/amd64/include/bus_at386.h
+++ b/sys/amd64/include/bus_at386.h
@@ -1152,30 +1152,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 		__asm __volatile("" : : : "memory");
 }
 	
-
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/amd64/include/bus_dma.h b/sys/amd64/include/bus_dma.h
index 3423e6b1ad4f..9f036b605ee7 100644
--- a/sys/amd64/include/bus_dma.h
+++ b/sys/amd64/include/bus_dma.h
@@ -1152,30 +1152,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 		__asm __volatile("" : : : "memory");
 }
 	
-
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/i386/include/bus_at386.h b/sys/i386/include/bus_at386.h
index 3423e6b1ad4f..9f036b605ee7 100644
--- a/sys/i386/include/bus_at386.h
+++ b/sys/i386/include/bus_at386.h
@@ -1152,30 +1152,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 		__asm __volatile("" : : : "memory");
 }
 	
-
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/i386/include/bus_dma.h b/sys/i386/include/bus_dma.h
index 3423e6b1ad4f..9f036b605ee7 100644
--- a/sys/i386/include/bus_dma.h
+++ b/sys/i386/include/bus_dma.h
@@ -1152,30 +1152,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 		__asm __volatile("" : : : "memory");
 }
 	
-
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/i386/include/bus_pc98.h b/sys/i386/include/bus_pc98.h
index d1a5ca8bb0a3..271356e46675 100644
--- a/sys/i386/include/bus_pc98.h
+++ b/sys/i386/include/bus_pc98.h
@@ -1454,30 +1454,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 		__asm __volatile("" : : : "memory");
 }
 	
-
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/ia64/include/bus.h b/sys/ia64/include/bus.h
index 9bb2f76ad78e..724d1d581d8e 100644
--- a/sys/ia64/include/bus.h
+++ b/sys/ia64/include/bus.h
@@ -1023,29 +1023,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 	ia64_mf();
 }
 
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(IA64_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(IA64_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(IA64_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */
diff --git a/sys/sys/bus_dma.h b/sys/sys/bus_dma.h
index 3423e6b1ad4f..9f036b605ee7 100644
--- a/sys/sys/bus_dma.h
+++ b/sys/sys/bus_dma.h
@@ -1152,30 +1152,6 @@ bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
 		__asm __volatile("" : : : "memory");
 }
 	
-
-/*
- * Generic memory barrier functions.
- */
-static __inline void
-barrier_read(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0, BUS_SPACE_BARRIER_READ);
-}
-
-static __inline void
-barrier_write(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_WRITE);
-}
-
-static __inline void
-barrier_rw(void)
-{
-	bus_space_barrier(I386_BUS_SPACE_MEM, 0, 0, ~0,
-	    BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-}
-
 /*
  * Flags used in various bus DMA methods.
  */