linux/blkpg.h needs <linux/compiler.h> for __user

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

include/linux/blkpg.h

@@ -24,6 +24,7 @@
  *
  * For today, only the partition stuff - aeb, 990515
  */
+#include <linux/compiler.h>
 #include <linux/ioctl.h>
 
 #define BLKPG      _IO(0x12,105)