Unexport asm/user.h and linux/user.h

Do not export asm/user.h and linux/user.h during make headers_install.
Signed-off-by: Kirill A. Shutemov <k.shutemov@gmail.com>
Reviewed-by: David Woodhouse <dwmw2@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-generic/Kbuild.asm

@@ -27,7 +27,6 @@ unifdef-y += termbits.h
 unifdef-y += termios.h
 unifdef-y += types.h
 unifdef-y += unistd.h
-unifdef-y += user.h
 
 # These probably shouldn't be exported
 unifdef-y += elf.h

include/asm-x86/Kbuild

@@ -22,7 +22,5 @@ unifdef-y += posix_types_64.h
 unifdef-y += ptrace.h
 unifdef-y += unistd_32.h
 unifdef-y += unistd_64.h
-unifdef-y += user_32.h
-unifdef-y += user_64.h
 unifdef-y += vm86.h
 unifdef-y += vsyscall.h

include/linux/Kbuild

@@ -344,7 +344,6 @@ unifdef-y += uinput.h
 unifdef-y += uio.h
 unifdef-y += unistd.h
 unifdef-y += usbdevice_fs.h
-unifdef-y += user.h
 unifdef-y += utsname.h
 unifdef-y += videodev2.h
 unifdef-y += videodev.h

include/linux/elfcore.h

@@ -4,7 +4,9 @@
 #include <linux/types.h>
 #include <linux/signal.h>
 #include <linux/time.h>
+#ifdef __KERNEL__
 #include <linux/user.h>
+#endif
 #include <linux/ptrace.h>
 
 struct elf_siginfo