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Subject[PATCH][V2] libata: make const arrays static, reduces object code size
Date
From: Colin Ian King <colin.king@canonical.com>

Don't populate const arrays on the stack, instead make them static.
Makes the object code smaller by over 260 bytes:

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/ata/libata-scsi.c | 10 +++++-----
fs/ocfs2/dlm/dlmrecovery.c | 1 -
2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 44ba292f2cd7..c3c483fc2145 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2145,7 +2145,7 @@ static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
*/
static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
{
- const u8 versions[] = {
+ static const u8 versions[] = {
0x00,
0x60, /* SAM-3 (no version claimed) */

@@ -2155,7 +2155,7 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
0x03,
0x00 /* SPC-3 (no version claimed) */
};
- const u8 versions_zbc[] = {
+ static const u8 versions_zbc[] = {
0x00,
0xA0, /* SAM-5 (no version claimed) */

@@ -2227,7 +2227,7 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
{
int num_pages;
- const u8 pages[] = {
+ static const u8 pages[] = {
0x00, /* page 0x00, this page */
0x80, /* page 0x80, unit serial no page */
0x83, /* page 0x83, device ident page */
@@ -2258,7 +2258,7 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
*/
static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
{
- const u8 hdr[] = {
+ static const u8 hdr[] = {
0,
0x80, /* this page code */
0,
@@ -2580,7 +2580,7 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
{
struct ata_device *dev = args->dev;
u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
- const u8 sat_blk_desc[] = {
+ static const u8 sat_blk_desc[] = {
0, 0, 0, 0, /* number of blocks: sat unspecified */
0,
0, 0x2, 0x0 /* block length: 512 bytes */
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 74407c6dd592..31a61e8e0152 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1129,7 +1129,6 @@ static int dlm_send_mig_lockres_msg(struct dlm_ctxt *dlm,
(mres->num_locks * sizeof(struct dlm_migratable_lock));

/* add an all-done flag if we reached the last lock */
- orig_flags = mres->flags;
BUG_ON(total_locks > mres_total_locks);
if (total_locks == mres_total_locks)
mres->flags |= DLM_MRES_ALL_DONE;
--
2.14.1
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