Fix compile issues in fs/compat_ioctl.c when CONFIG_BLOCK is disabled

Fix fs/compat_ioctl.c to handle CONFIG_BLOCK=n, CONFIG_SCSI=n to avoid
build errors:

In file included from include/scsi/scsi.h:12,
                 from fs/compat_ioctl.c:71:
include/scsi/scsi_cmnd.h:27:25: warning: "BLK_MAX_CDB" is not defined
include/scsi/scsi_cmnd.h:28:3: error: #error MAX_COMMAND_SIZE can not be bigger than BLK_MAX_CDB
In file included from include/scsi/scsi.h:12,
                 from fs/compat_ioctl.c:71:
include/scsi/scsi_cmnd.h: In function 'scsi_bidi_cmnd':
include/scsi/scsi_cmnd.h:182: error: implicit declaration of function 'blk_bidi_rq'
include/scsi/scsi_cmnd.h:183: error: dereferencing pointer to incomplete type
include/scsi/scsi_cmnd.h: In function 'scsi_in':
include/scsi/scsi_cmnd.h:189: error: dereferencing pointer to incomplete type

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/compat_ioctl.c

@@ -69,9 +69,11 @@
 #include <linux/capi.h>
 #include <linux/gigaset_dev.h>
 
+#ifdef CONFIG_BLOCK
 #include <scsi/scsi.h>
 #include <scsi/scsi_ioctl.h>
 #include <scsi/sg.h>
+#endif
 
 #include <asm/uaccess.h>
 #include <linux/ethtool.h>
@@ -2024,6 +2026,7 @@ COMPATIBLE_IOCTL(GIO_UNISCRNMAP)
 COMPATIBLE_IOCTL(PIO_UNISCRNMAP)
 COMPATIBLE_IOCTL(PIO_FONTRESET)
 COMPATIBLE_IOCTL(PIO_UNIMAPCLR)
+#ifdef CONFIG_BLOCK
 /* Big S */
 COMPATIBLE_IOCTL(SCSI_IOCTL_GET_IDLUN)
 COMPATIBLE_IOCTL(SCSI_IOCTL_DOORLOCK)
@@ -2033,6 +2036,7 @@ COMPATIBLE_IOCTL(SCSI_IOCTL_GET_BUS_NUMBER)
 COMPATIBLE_IOCTL(SCSI_IOCTL_SEND_COMMAND)
 COMPATIBLE_IOCTL(SCSI_IOCTL_PROBE_HOST)
 COMPATIBLE_IOCTL(SCSI_IOCTL_GET_PCI)
+#endif
 /* Big T */
 COMPATIBLE_IOCTL(TUNSETNOCSUM)
 COMPATIBLE_IOCTL(TUNSETDEBUG)
@@ -2103,6 +2107,7 @@ COMPATIBLE_IOCTL(SIOCGIFVLAN)
 COMPATIBLE_IOCTL(SIOCSIFVLAN)
 COMPATIBLE_IOCTL(SIOCBRADDBR)
 COMPATIBLE_IOCTL(SIOCBRDELBR)
+#ifdef CONFIG_BLOCK
 /* SG stuff */
 COMPATIBLE_IOCTL(SG_SET_TIMEOUT)
 COMPATIBLE_IOCTL(SG_GET_TIMEOUT)
@@ -2127,6 +2132,7 @@ COMPATIBLE_IOCTL(SG_SCSI_RESET)
 COMPATIBLE_IOCTL(SG_GET_REQUEST_TABLE)
 COMPATIBLE_IOCTL(SG_SET_KEEP_ORPHAN)
 COMPATIBLE_IOCTL(SG_GET_KEEP_ORPHAN)
+#endif
 /* PPP stuff */
 COMPATIBLE_IOCTL(PPPIOCGFLAGS)
 COMPATIBLE_IOCTL(PPPIOCSFLAGS)