[PATCH v2] Fix endianness issues in mdc_request.c

[skanda.kashyap at gmail.com]

From: Skanda Guruanand <skanda.kashyap at gmail.com>

Sparse generates warnings where cast to restricted types are made.
This commit changes types of struct fields to match endianness.

Signed-off-by: Skanda Guruanand <skanda.kashyap at gmail.com>
---
I have modified struct lu_dirpage in lustre_idl.h file to remove the sparse warnings
where cast to restricted types are made.

Following warnings were removed by this fix.

drivers/staging/lustre/lustre/mdc/mdc_request.c:958:42: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:959:42: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:962:42: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:963:42: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:985:50: warning: cast to restricted __le32
drivers/staging/lustre/lustre/mdc/mdc_request.c:1193:24: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:1328:25: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:1329:23: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:1332:25: warning: cast to restricted __le64
drivers/staging/lustre/lustre/mdc/mdc_request.c:1333:23: warning: cast to restricted __le64

I have not got a chance to test it as I don't have a big endian system. I feel the change
is reasonably correct as the elements of the structure lu_dirpage are always converted from
little-endian format to processor's native format.

 drivers/staging/lustre/lustre/include/lustre/lustre_idl.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
index 60b827e..df48b8d 100644
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
@@ -846,10 +846,10 @@ struct luda_type {
 #endif
 
 struct lu_dirpage {
-	__u64	    ldp_hash_start;
-	__u64	    ldp_hash_end;
-	__u32	    ldp_flags;
-	__u32	    ldp_pad0;
+	__le64	    ldp_hash_start;
+	__le64	    ldp_hash_end;
+	__le32	    ldp_flags;
+	__le32	    ldp_pad0;
 	struct lu_dirent ldp_entries[0];
 };
 
-- 
1.9.1