hpsa: use gcc aligned attribute instead of manually padding structs
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: Webb Scales <webb.scales@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index b5cc705..db89245 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -375,6 +375,7 @@
* or a bus address.
*/
+#define COMMANDLIST_ALIGNMENT 128
struct CommandList {
struct CommandListHeader Header;
struct RequestBlock Request;
@@ -389,21 +390,7 @@
struct list_head list;
struct completion *waiting;
void *scsi_cmd;
-
-/* on 64 bit architectures, to get this to be 32-byte-aligned
- * it so happens we need PAD_64 bytes of padding, on 32 bit systems,
- * we need PAD_32 bytes of padding (see below). This does that.
- * If it happens that 64 bit and 32 bit systems need different
- * padding, PAD_32 and PAD_64 can be set independently, and.
- * the code below will do the right thing.
- */
-#define IS_32_BIT ((8 - sizeof(long))/4)
-#define IS_64_BIT (!IS_32_BIT)
-#define PAD_32 (40)
-#define PAD_64 (12)
-#define COMMANDLIST_PAD (IS_32_BIT * PAD_32 + IS_64_BIT * PAD_64)
- u8 pad[COMMANDLIST_PAD];
-};
+} __aligned(COMMANDLIST_ALIGNMENT);
/* Max S/G elements in I/O accelerator command */
#define IOACCEL1_MAXSGENTRIES 24
@@ -413,6 +400,7 @@
* Structure for I/O accelerator (mode 1) commands.
* Note that this structure must be 128-byte aligned in size.
*/
+#define IOACCEL1_COMMANDLIST_ALIGNMENT 128
struct io_accel1_cmd {
u16 dev_handle; /* 0x00 - 0x01 */
u8 reserved1; /* 0x02 */
@@ -440,12 +428,7 @@
struct vals32 host_addr; /* 0x70 - 0x77 */
u8 CISS_LUN[8]; /* 0x78 - 0x7F */
struct SGDescriptor SG[IOACCEL1_MAXSGENTRIES];
-#define IOACCEL1_PAD_64 0
-#define IOACCEL1_PAD_32 0
-#define IOACCEL1_PAD (IS_32_BIT * IOACCEL1_PAD_32 + \
- IS_64_BIT * IOACCEL1_PAD_64)
- u8 pad[IOACCEL1_PAD];
-};
+} __aligned(IOACCEL1_COMMANDLIST_ALIGNMENT);
#define IOACCEL1_FUNCTION_SCSIIO 0x00
#define IOACCEL1_SGLOFFSET 32
@@ -510,14 +493,11 @@
u8 sense_data_buff[32]; /* sense/response data buffer */
};
-#define IOACCEL2_64_PAD 76
-#define IOACCEL2_32_PAD 76
-#define IOACCEL2_PAD (IS_32_BIT * IOACCEL2_32_PAD + \
- IS_64_BIT * IOACCEL2_64_PAD)
/*
* Structure for I/O accelerator (mode 2 or m2) commands.
* Note that this structure must be 128-byte aligned in size.
*/
+#define IOACCEL2_COMMANDLIST_ALIGNMENT 128
struct io_accel2_cmd {
u8 IU_type; /* IU Type */
u8 direction; /* direction, memtype, and encryption */
@@ -544,8 +524,7 @@
u32 tweak_upper; /* Encryption tweak, upper 4 bytes */
struct ioaccel2_sg_element sg[IOACCEL2_MAXSGENTRIES];
struct io_accel2_scsi_response error_data;
- u8 pad[IOACCEL2_PAD];
-};
+} __aligned(IOACCEL2_COMMANDLIST_ALIGNMENT);
/*
* defines for Mode 2 command struct