[PATCH] block: fix bio.c kernel-doc notation warning

From: Randy Dunlap <redacted>

Sphinx treats symbols that end with '_' as some kind of special
documentation indicator, so fix that by adding an ending '*'
to it.

../block/bio.c:404: ERROR: Unknown target name: "gfp".

Signed-off-by: Randy Dunlap <redacted>
---
 block/bio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- lnx-413.orig/block/bio.c
+++ lnx-413/block/bio.c

@@ -400,7 +400,7 @@ static void punt_bios_to_rescuer(struct
 
 /**
  * bio_alloc_bioset - allocate a bio for I/O
- * @gfp_mask:   the GFP_ mask given to the slab allocator
+ * @gfp_mask:   the GFP_* mask given to the slab allocator
  * @nr_iovecs:	number of iovecs to pre-allocate
  * @bs:		the bio_set to allocate from.
  *