[CIFS] Change pragma pack(1) to attribute(packed) to allow cifs on arm to access

unaligned structures coming in off the wire

gcc on arm processors generates very odd code with pragma pack specified -
although it does pack the structures in some sense - it does not allow you
to access unaligned elements in nested structures at the right offset as other
architectures do.  Oddly enough though, specifying the structures as packed
the long way - one by one with the packed attribute does work.  Rather than
fighting over whether this is a gcc bug or some obscure side effect
of pragma pack, it is easier to do what most (all but 96 other places in
the kernel) do - and replace pragma pack with dozens of attribute(packed)
structure qualifiers.  Much more verbose ... but at least it works.

Signed-off-by: David Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>  CG: -----------------------------------------------------------------------

1 files changed, 4 insertions, 8 deletions

diff --git a/fs/cifs/ntlmssp.h b/fs/cifs/ntlmssp.h
index 6facb41117a3..803389b64a2c 100644
--- a/fs/cifs/ntlmssp.h
+++ b/fs/cifs/ntlmssp.h
@@ -19,8 +19,6 @@
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
  */
 
-#pragma pack(1)
-
 #define NTLMSSP_SIGNATURE "NTLMSSP"
 /* Message Types */
 #define NtLmNegotiate     cpu_to_le32(1)
@@ -63,7 +61,7 @@ typedef struct _SECURITY_BUFFER {
         __le16 Length;
         __le16 MaximumLength;
         __le32 Buffer;          /* offset to buffer */
-} SECURITY_BUFFER;
+} __attribute__((packed)) SECURITY_BUFFER;
 
 typedef struct _NEGOTIATE_MESSAGE {
         __u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
@@ -73,7 +71,7 @@ typedef struct _NEGOTIATE_MESSAGE {
         SECURITY_BUFFER WorkstationName;        /* RFC 1001 and ASCII */
         char DomainString[0];
         /* followed by WorkstationString */
-} NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
+} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
 
 typedef struct _CHALLENGE_MESSAGE {
         __u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
@@ -83,7 +81,7 @@ typedef struct _CHALLENGE_MESSAGE {
         __u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
         __u8 Reserved[8];
         SECURITY_BUFFER TargetInfoArray;
-} CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
+} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
 
 typedef struct _AUTHENTICATE_MESSAGE {
         __u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
@@ -96,6 +94,4 @@ typedef struct _AUTHENTICATE_MESSAGE {
         SECURITY_BUFFER SessionKey;
         __le32 NegotiateFlags;
         char UserString[0];
-} AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
-
-#pragma pack()                  /* resume default structure packing */
+} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;