* [PATCH] libata: zpodd: make arrays cdb static, reduces object code size
@ 2017-09-06 8:56 Colin King
2017-09-06 14:40 ` Tejun Heo
0 siblings, 1 reply; 2+ messages in thread
From: Colin King @ 2017-09-06 8:56 UTC (permalink / raw)
To: Tejun Heo, linux-ide; +Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
Don't populate the arrays cdb on the stack, instead make them static.
Makes the object code smaller by 230 bytes:
Before:
text data bss dec hex filename
3797 240 0 4037 fc5 drivers/ata/libata-zpodd.o
After:
text data bss dec hex filename
3407 400 0 3807 edf drivers/ata/libata-zpodd.o
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/ata/libata-zpodd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/ata/libata-zpodd.c b/drivers/ata/libata-zpodd.c
index 8a01d09ac4db..23a62e4015d0 100644
--- a/drivers/ata/libata-zpodd.c
+++ b/drivers/ata/libata-zpodd.c
@@ -34,7 +34,7 @@ struct zpodd {
static int eject_tray(struct ata_device *dev)
{
struct ata_taskfile tf;
- const char cdb[] = { GPCMD_START_STOP_UNIT,
+ static const char cdb[] = { GPCMD_START_STOP_UNIT,
0, 0, 0,
0x02, /* LoEj */
0, 0, 0, 0, 0, 0, 0,
@@ -55,7 +55,7 @@ static enum odd_mech_type zpodd_get_mech_type(struct ata_device *dev)
unsigned int ret;
struct rm_feature_desc *desc = (void *)(buf + 8);
struct ata_taskfile tf;
- char cdb[] = { GPCMD_GET_CONFIGURATION,
+ static const char cdb[] = { GPCMD_GET_CONFIGURATION,
2, /* only 1 feature descriptor requested */
0, 3, /* 3, removable medium feature */
0, 0, 0,/* reserved */
--
2.14.1
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] libata: zpodd: make arrays cdb static, reduces object code size
2017-09-06 8:56 [PATCH] libata: zpodd: make arrays cdb static, reduces object code size Colin King
@ 2017-09-06 14:40 ` Tejun Heo
0 siblings, 0 replies; 2+ messages in thread
From: Tejun Heo @ 2017-09-06 14:40 UTC (permalink / raw)
To: Colin King; +Cc: linux-ide, kernel-janitors, linux-kernel
On Wed, Sep 06, 2017 at 09:56:29AM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Don't populate the arrays cdb on the stack, instead make them static.
> Makes the object code smaller by 230 bytes:
>
> Before:
> text data bss dec hex filename
> 3797 240 0 4037 fc5 drivers/ata/libata-zpodd.o
>
> After:
> text data bss dec hex filename
> 3407 400 0 3807 edf drivers/ata/libata-zpodd.o
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Applied to libata/for-4.14.
Thanks.
--
tejun
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2017-09-06 14:41 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-09-06 8:56 [PATCH] libata: zpodd: make arrays cdb static, reduces object code size Colin King
2017-09-06 14:40 ` Tejun Heo
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®