diff --git a/arch/sparc/kernel/irq.c b/arch/sparc/kernel/irq.c
index e1e24f31aa5463c7a55e2d30ac77a3e1900d12a5..01a6756ba3718182bdd93753ad8db4c5f1f5d0e9 100644
--- a/arch/sparc/kernel/irq.c
+++ b/arch/sparc/kernel/irq.c
@@ -18,7 +18,6 @@
 #include <linux/linkage.h>
 #include <linux/kernel_stat.h>
 #include <linux/signal.h>
-#include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
 #include <linux/random.h>
diff --git a/arch/sparc64/kernel/ds.c b/arch/sparc64/kernel/ds.c
index 9f472a79d37e04236add3ad9138bc0de33695bd9..eeb5a2fc788d2615e47660ae7c6962ca1777126a 100644
--- a/arch/sparc64/kernel/ds.c
+++ b/arch/sparc64/kernel/ds.c
@@ -6,7 +6,6 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/types.h>
-#include <linux/module.h>
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
diff --git a/arch/sparc64/kernel/module.c b/arch/sparc64/kernel/module.c
index 579871527699ed616a7a5c838be648a88884ca1a..158484bf59993dd915b6190d0ac31eeac7938404 100644
--- a/arch/sparc64/kernel/module.c
+++ b/arch/sparc64/kernel/module.c
@@ -11,7 +11,6 @@
 #include <linux/fs.h>
 #include <linux/string.h>
 #include <linux/slab.h>
-#include <linux/vmalloc.h>
 #include <linux/mm.h>
 
 #include <asm/processor.h>
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index 78caff926737b532fc3216a8b5312d2be97375df..98c468803ce35d345e72439280485fe546906ad2 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -51,7 +51,6 @@
 #include <linux/vfs.h>
 #include <linux/netfilter_ipv4/ip_tables.h>
 #include <linux/ptrace.h>
-#include <linux/highuid.h>
 
 #include <asm/types.h>
 #include <asm/uaccess.h>
diff --git a/arch/sparc64/kernel/sys_sunos32.c b/arch/sparc64/kernel/sys_sunos32.c
index 170d6ca8de6f0e4d36b26c81ffdd0592059acfe2..cfc22d3fe54c1cdd631ff3ffe1160d73e78aec18 100644
--- a/arch/sparc64/kernel/sys_sunos32.c
+++ b/arch/sparc64/kernel/sys_sunos32.c
@@ -57,7 +57,6 @@
 #include <linux/personality.h>
 
 /* For SOCKET_I */
-#include <linux/socket.h>
 #include <net/sock.h>
 #include <net/compat.h>
 
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index a2cf955294c1ae89f23a4a31c93a629e735622cb..4352ee4d8dac32863bd588f47ce91ad5f2d8859c 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -28,7 +28,6 @@
 #include <linux/jiffies.h>
 #include <linux/cpufreq.h>
 #include <linux/percpu.h>
-#include <linux/profile.h>
 #include <linux/miscdevice.h>
 #include <linux/rtc.h>
 #include <linux/kernel_stat.h>
@@ -47,7 +46,6 @@
 #include <asm/sections.h>
 #include <asm/cpudata.h>
 #include <asm/uaccess.h>
-#include <asm/prom.h>
 #include <asm/irq_regs.h>
 
 DEFINE_SPINLOCK(mostek_lock);
diff --git a/include/asm-sparc64/vio.h b/include/asm-sparc64/vio.h
index f7417e91b1706bb79c438446b8b941e5ddb7c9ef..d4de32f0f8afdb849495f29aff26f3c0f004f7d3 100644
--- a/include/asm-sparc64/vio.h
+++ b/include/asm-sparc64/vio.h
@@ -8,6 +8,7 @@
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/list.h>
+#include <linux/log2.h>
 
 #include <asm/ldc.h>
 #include <asm/mdesc.h>
@@ -257,8 +258,7 @@ static inline void *vio_dring_entry(struct vio_dring_state *dr,
 static inline u32 vio_dring_avail(struct vio_dring_state *dr,
 				  unsigned int ring_size)
 {
-	/* Ensure build-time power-of-2.  */
-	BUILD_BUG_ON(ring_size & (ring_size - 1));
+	BUILD_BUG_ON(!is_power_of_2(ring_size));
 
 	return (dr->pending -
 		((dr->prod - dr->cons) & (ring_size - 1)));