From: Colin King <colin.king@canonical.com>
To: Tejun Heo <tj@kernel.org>, linux-ide@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH][V3] libata: make static arrays const, reduces object code size
Date: Tue, 19 Sep 2017 09:39:52 +0100 [thread overview]
Message-ID: <20170919083952.5648-1-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
Don't populate const arrayis on the stack, instead make them static.
Makes the object code smaller by over 260 bytes:
Before:
text data bss dec hex filename
64864 5948 4128 74940 124bc drivers/ata/libata-scsi.o
After:
text data bss dec hex filename
64183 6364 4128 74675 123b3 drivers/ata/libata-scsi.o
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/ata/libata-scsi.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 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 */
--
2.14.1
next reply other threads:[~2017-09-19 8:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-19 8:39 Colin King [this message]
2017-09-19 18:54 ` Tejun Heo
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