diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
index f8190ba45a3e..db05f9766112 100644
--- a/arch/arm64/include/asm/hwcap.h
+++ b/arch/arm64/include/asm/hwcap.h
@@ -35,7 +35,8 @@
 #define COMPAT_HWCAP_IDIVT	(1 << 18)
 #define COMPAT_HWCAP_IDIV	(COMPAT_HWCAP_IDIVA|COMPAT_HWCAP_IDIVT)
 
-#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
 /*
  * This yields a mask that user programs can use to figure out what
  * instruction set this cpu supports.
@@ -49,5 +50,6 @@
 
 extern unsigned int elf_hwcap;
 #endif
+#endif
 
 #endif
diff --git a/arch/arm64/include/asm/stat.h b/arch/arm64/include/asm/stat.h
index d87225cbead8..a9f580c28f7b 100644
--- a/arch/arm64/include/asm/stat.h
+++ b/arch/arm64/include/asm/stat.h
@@ -18,7 +18,8 @@
 
 #include <asm-generic/stat.h>
 
-#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
 
 #include <asm/compat.h>
 
@@ -57,6 +58,7 @@ struct stat64 {
 	compat_u64	st_ino;
 };
 
+#endif
 #endif
 
 #endif
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index fe18a683274f..8f03dee066ed 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -13,15 +13,13 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-#if !defined(__ASM_UNISTD_H) || defined(__SYSCALL)
-#define __ASM_UNISTD_H
 
 #ifndef __SYSCALL_COMPAT
 #include <asm-generic/unistd.h>
 #endif
 
-#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
 #include <asm/unistd32.h>
 #endif
-
-#endif /* __ASM_UNISTD_H */
+#endif
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index a50405f5ee42..3ba1f1a90629 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -16,8 +16,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-#if !defined(__ASM_UNISTD32_H) || defined(__SYSCALL)
-#define __ASM_UNISTD32_H
 
 #ifndef __SYSCALL
 #define __SYSCALL(x, y)
@@ -754,5 +752,3 @@ __SYSCALL(__NR_syncfs, sys_syncfs)
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK
 #define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
-
-#endif /* __ASM_UNISTD32_H */
diff --git a/arch/c6x/Makefile b/arch/c6x/Makefile
index 1d08dd070277..a9eb9597e03c 100644
--- a/arch/c6x/Makefile
+++ b/arch/c6x/Makefile
@@ -6,6 +6,8 @@
 # for more details.
 #
 
+KBUILD_DEFCONFIG := dsk6455_defconfig
+
 cflags-y += -mno-dsbt -msdata=none
 
 cflags-$(CONFIG_C6X_BIG_KERNEL) += -mlong-calls
diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
index f08e89183cda..277f1a4ecb09 100644
--- a/arch/c6x/include/asm/Kbuild
+++ b/arch/c6x/include/asm/Kbuild
@@ -40,6 +40,7 @@ generic-y += sembuf.h
 generic-y += shmbuf.h
 generic-y += shmparam.h
 generic-y += siginfo.h
+generic-y += signal.h
 generic-y += socket.h
 generic-y += sockios.h
 generic-y += stat.h
diff --git a/arch/c6x/include/asm/signal.h b/arch/c6x/include/asm/signal.h
deleted file mode 100644
index f1cd870596a3..000000000000
--- a/arch/c6x/include/asm/signal.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef _ASM_C6X_SIGNAL_H
-#define _ASM_C6X_SIGNAL_H
-
-#include <asm-generic/signal.h>
-
-#ifndef __ASSEMBLY__
-#include <linux/linkage.h>
-
-struct pt_regs;
-
-extern asmlinkage int do_rt_sigreturn(struct pt_regs *regs);
-extern asmlinkage void do_notify_resume(struct pt_regs *regs,
-					u32 thread_info_flags,
-					int syscall);
-#endif
-
-#endif /* _ASM_C6X_SIGNAL_H */
diff --git a/arch/c6x/include/asm/unistd.h b/arch/c6x/include/asm/unistd.h
index 6d54ea4262eb..ed2259043eec 100644
--- a/arch/c6x/include/asm/unistd.h
+++ b/arch/c6x/include/asm/unistd.h
@@ -13,8 +13,6 @@
  *   NON INFRINGEMENT.	See the GNU General Public License for
  *   more details.
  */
-#if !defined(_ASM_C6X_UNISTD_H) || defined(__SYSCALL)
-#define _ASM_C6X_UNISTD_H
 
 /* Use the standard ABI for syscalls. */
 #include <asm-generic/unistd.h>
@@ -22,5 +20,3 @@
 /* C6X-specific syscalls. */
 #define __NR_cache_sync	(__NR_arch_specific_syscall + 0)
 __SYSCALL(__NR_cache_sync, sys_cache_sync)
-
-#endif /* _ASM_C6X_UNISTD_H */
diff --git a/arch/hexagon/include/asm/unistd.h b/arch/hexagon/include/asm/unistd.h
index 4d0ecde3665f..c0d5565030ae 100644
--- a/arch/hexagon/include/asm/unistd.h
+++ b/arch/hexagon/include/asm/unistd.h
@@ -18,9 +18,6 @@
  * 02110-1301, USA.
  */
 
-#if !defined(_ASM_HEXAGON_UNISTD_H) || defined(__SYSCALL)
-#define _ASM_HEXAGON_UNISTD_H
-
 /*
  *  The kernel pulls this unistd.h in three different ways:
  *  1.  the "normal" way which gets all the __NR defines
@@ -32,5 +29,3 @@
 #define sys_mmap2 sys_mmap_pgoff
 
 #include <asm-generic/unistd.h>
-
-#endif
diff --git a/arch/openrisc/include/asm/unistd.h b/arch/openrisc/include/asm/unistd.h
index 89af3ab5c2e9..437bdbb61b14 100644
--- a/arch/openrisc/include/asm/unistd.h
+++ b/arch/openrisc/include/asm/unistd.h
@@ -16,9 +16,6 @@
  * (at your option) any later version.
  */
 
-#if !defined(__ASM_OPENRISC_UNISTD_H) || defined(__SYSCALL)
-#define __ASM_OPENRISC_UNISTD_H
-
 #define __ARCH_HAVE_MMU
 
 #define sys_mmap2 sys_mmap_pgoff
@@ -27,5 +24,3 @@
 
 #define __NR_or1k_atomic __NR_arch_specific_syscall
 __SYSCALL(__NR_or1k_atomic, sys_or1k_atomic)
-
-#endif /* __ASM_OPENRISC_UNISTD_H */
diff --git a/arch/score/include/asm/unistd.h b/arch/score/include/asm/unistd.h
index 4aa957364d4d..a862384e9c16 100644
--- a/arch/score/include/asm/unistd.h
+++ b/arch/score/include/asm/unistd.h
@@ -1,6 +1,3 @@
-#if !defined(_ASM_SCORE_UNISTD_H) || defined(__SYSCALL)
-#define _ASM_SCORE_UNISTD_H
-
 #define __ARCH_HAVE_MMU
 
 #define __ARCH_WANT_SYSCALL_NO_AT
@@ -9,5 +6,3 @@
 #define __ARCH_WANT_SYSCALL_DEPRECATED
 
 #include <asm-generic/unistd.h>
-
-#endif /* _ASM_SCORE_UNISTD_H */
diff --git a/arch/tile/include/asm/unistd.h b/arch/tile/include/asm/unistd.h
index a017246ca0ce..0e1f3e66e492 100644
--- a/arch/tile/include/asm/unistd.h
+++ b/arch/tile/include/asm/unistd.h
@@ -12,9 +12,6 @@
  *   more details.
  */
 
-#if !defined(_ASM_TILE_UNISTD_H) || defined(__SYSCALL)
-#define _ASM_TILE_UNISTD_H
-
 #if !defined(__LP64__) || defined(__SYSCALL_COMPAT)
 /* Use the flavor of this syscall that matches the 32-bit API better. */
 #define __ARCH_WANT_SYNC_FILE_RANGE2
@@ -43,5 +40,3 @@ __SYSCALL(__NR_cmpxchg_badaddr, sys_cmpxchg_badaddr)
 #endif
 #define __ARCH_WANT_SYS_NEWFSTATAT
 #endif
-
-#endif /* _ASM_TILE_UNISTD_H */
diff --git a/arch/unicore32/include/asm/unistd.h b/arch/unicore32/include/asm/unistd.h
index 9b2428019961..2abcf61c615d 100644
--- a/arch/unicore32/include/asm/unistd.h
+++ b/arch/unicore32/include/asm/unistd.h
@@ -9,10 +9,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#if !defined(__UNICORE_UNISTD_H__) || defined(__SYSCALL)
-#define __UNICORE_UNISTD_H__
 
 /* Use the standard ABI for syscalls. */
 #include <asm-generic/unistd.h>
-
-#endif /* __UNICORE_UNISTD_H__ */
diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h
index 3748ec92dcbc..cf22fae8cae1 100644
--- a/include/asm-generic/unistd.h
+++ b/include/asm-generic/unistd.h
@@ -1,6 +1,3 @@
-#if !defined(_ASM_GENERIC_UNISTD_H) || defined(__SYSCALL)
-#define _ASM_GENERIC_UNISTD_H
-
 #include <asm/bitsperlong.h>
 
 /*
@@ -930,4 +927,3 @@ __SYSCALL(__NR_fork, sys_ni_syscall)
 #endif
 
 #endif /* __KERNEL__ */
-#endif /* _ASM_GENERIC_UNISTD_H */
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index e149e8be9065..aab5c85879b2 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -21,18 +21,15 @@ header-y += usb/
 header-y += wimax/
 
 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/a.out.h \
-		  $(srctree)/include/asm-$(SRCARCH)/a.out.h \
-		  $(INSTALL_HDR_PATH)/include/asm-*/a.out.h),)
+		  $(srctree)/arch/$(SRCARCH)/include/uapi/asm/a.out.h),)
 header-y += a.out.h
 endif
 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/kvm.h \
-		  $(srctree)/include/asm-$(SRCARCH)/kvm.h \
-		  $(INSTALL_HDR_PATH)/include/asm-*/kvm.h),)
+		  $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm.h),)
 header-y += kvm.h
 endif
 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/kvm_para.h \
-		  $(srctree)/include/asm-$(SRCARCH)/kvm_para.h \
-		  $(INSTALL_HDR_PATH)/include/asm-*/kvm_para.h),)
+		  $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm_para.h),)
 header-y += kvm_para.h
 endif