block: make sure that REQ_* types are seen even with CONFIG_BLOCK=n

These form the basis of the basic WRITE etc primitives, so we
need them to be always visible. Otherwise we see errors like:

	mm/filemap.c:2164: error: 'REQ_WRITE' undeclared
	fs/read_write.c:362: error: 'REQ_WRITE' undeclared
	fs/splice.c:1108: error: 'REQ_WRITE' undeclared
	fs/aio.c:1496: error: 'REQ_WRITE' undeclared

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 118523734af0..53691774d34e 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -108,6 +108,8 @@ struct bio {
 #define BIO_POOL_MASK           (1UL << BIO_POOL_OFFSET)
 #define BIO_POOL_IDX(bio)       ((bio)->bi_flags >> BIO_POOL_OFFSET)
 
+#endif /* CONFIG_BLOCK */
+
 /*
  * Request flags.  For use in the cmd_flags field of struct request, and in
  * bi_rw of struct bio.  Note that some flags are only valid in either one.
@@ -189,5 +191,4 @@ enum rq_flag_bits {
 #define REQ_IO_STAT             (1 << __REQ_IO_STAT)
 #define REQ_MIXED_MERGE         (1 << __REQ_MIXED_MERGE)
 
-#endif /* CONFIG_BLOCK */
 #endif /* __LINUX_BLK_TYPES_H */