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Subject[PATCH v4 06/27] ata: use COMMAND_LINE_SIZE for ata_force_param_buf[] size
Date
Use COMMAND_LINE_SIZE instead PAGE_SIZE for ata_force_param_buf[]
size as libata parameters buffer doesn't need to be bigger than
the command line buffer.

For many architectures this results in decreased libata-core.o
size (COMMAND_LINE_SIZE varies from 256 to 4096 while the minimum
PAGE_SIZE is 4096).

Code size savings on m68k arch using (modified) atari_defconfig:

text data bss dec hex filename
before:
41064 4413 40 45517 b1cd drivers/ata/libata-core.o
after:
41064 573 40 41677 a2cd drivers/ata/libata-core.o

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
drivers/ata/libata-core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 1b509ccc67f3..0c9ac46d3109 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -52,6 +52,7 @@
#include <linux/leds.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
+#include <asm/setup.h>

#define CREATE_TRACE_POINTS
#include <trace/events/libata.h>
@@ -106,7 +107,7 @@ struct ata_force_ent {
static struct ata_force_ent *ata_force_tbl;
static int ata_force_tbl_size;

-static char ata_force_param_buf[PAGE_SIZE] __initdata;
+static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata;
/* param_buf is thrown away after initialization, disallow read */
module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
--
2.24.1
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