[PATCH] gfp flags annotations - part 1

 - added typedef unsigned int __nocast gfp_t;

 - replaced __nocast uses for gfp flags with gfp_t - it gives exactly
   the same warnings as far as sparse is concerned, doesn't change
   generated code (from gcc point of view we replaced unsigned int with
   typedef) and documents what's going on far better.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index d9a2564..acbf31c 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -19,7 +19,7 @@
 #define	AS_EIO		(__GFP_BITS_SHIFT + 0)	/* IO error on async write */
 #define AS_ENOSPC	(__GFP_BITS_SHIFT + 1)	/* ENOSPC on async write */
 
-static inline unsigned int __nocast mapping_gfp_mask(struct address_space * mapping)
+static inline gfp_t mapping_gfp_mask(struct address_space * mapping)
 {
 	return mapping->flags & __GFP_BITS_MASK;
 }