[PATCH] scsi: scsi_transport_spi make two const arrays static, shrinks object size

Colin King
2018-02-14T22:35:49Z

From: Colin Ian King <colin.king@canonical.com>

Don't populate the const read-only arrays spi_test_unit_ready and
spi_test_unit_ready on the stack but instead make them static. Makes the
object code smaller by over 100 bytes:

Before:
text data bss dec hex filename
40171 12832 128 53131 cf8b drivers/scsi/scsi_transport_spi.o

After:
text data bss dec hex filename
39922 12976 128 53026 cf22 drivers/scsi/scsi_transport_spi.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/scsi/scsi_transport_spi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 871ea582029e..2ca150b16764 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -822,11 +822,11 @@ spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer)
* fails, the device won't let us write to the echo buffer
* so just return failure */

- const char spi_test_unit_ready[] = {
+ static const char spi_test_unit_ready[] = {
TEST_UNIT_READY, 0, 0, 0, 0, 0
};

- const char spi_read_buffer_descriptor[] = {
+ static const char spi_read_buffer_descriptor[] = {
READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0
};

--
2.15.1