[PATCH] ufs: wrong type cast

There are two ugly macros in ufs code:
#define UCPI_UBH ((struct ufs_buffer_head *)ucpi)
#define USPI_UBH ((struct ufs_buffer_head *)uspi)
when uspi looks like
struct {
struct ufs_buffer_head ;
}
and USPI_UBH has some sence,
ucpi looks like
struct {
struct not_ufs_buffer_head;
}

To prevent bugs in future, this patch convert macros to inline function and
fix "ucpi" structure.

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 11 insertions, 5 deletions

diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index e10362d8f456..6a0b48cf9cef 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -17,10 +17,16 @@
 #define in_range(b,first,len)	((b)>=(first)&&(b)<(first)+(len))
 
 /*
- * macros used for retyping
+ * functions used for retyping
  */
-#define UCPI_UBH ((struct ufs_buffer_head *)ucpi)
-#define USPI_UBH ((struct ufs_buffer_head *)uspi)
+static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
+{
+	return &cpi->c_ubh;
+}
+static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
+{
+	return &spi->s_ubh;
+}
 
 
 
@@ -326,10 +332,10 @@ static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
  * Macros to access cylinder group array structures
  */
 #define ubh_cg_blktot(ucpi,cylno) \
-	(*((__fs32*)ubh_get_addr(UCPI_UBH, (ucpi)->c_btotoff + ((cylno) << 2))))
+	(*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
 
 #define ubh_cg_blks(ucpi,cylno,rpos) \
-	(*((__fs16*)ubh_get_addr(UCPI_UBH, \
+	(*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
 	(ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
 
 /*