[SERIAL] mark several serial tables const

This patch marks a few serial data structures const, moving them to
.rodata where they won't false-share cachelines with things that get
written to.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index e08510d..d2bcd1f 100644 (file)
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -102,7 +102,7 @@ static unsigned int share_irqs = SERIAL8250_SHARE_IRQS;
 #define SERIAL_PORT_DFNS
 #endif
 
-static struct old_serial_port old_serial_port[] = {
+static const struct old_serial_port old_serial_port[] = {
        SERIAL_PORT_DFNS /* defined in asm/serial.h */
 };
 

diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 5c3c039..8d92adf 100644 (file)
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -468,7 +468,7 @@ static unsigned short timedia_eight_port[] = {
        0x9167, 0x9168, 0xA066, 0xA167, 0xA168, 0
 };
 
-static struct timedia_struct {
+static const struct timedia_struct {
        int num;
        unsigned short *ids;
 } timedia_data[] = {

diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 2331296..c17d680 100644 (file)
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1779,7 +1779,7 @@ struct baud_rates {
        unsigned int cflag;
 };
 
-static struct baud_rates baud_rates[] = {
+static const struct baud_rates baud_rates[] = {
        { 921600, B921600 },
        { 460800, B460800 },
        { 230400, B230400 },

diff --git a/drivers/serial/serial_cs.c b/drivers/serial/serial_cs.c
index 2c7d3ef..7ce0c7e 100644 (file)
--- a/drivers/serial/serial_cs.c
+++ b/drivers/serial/serial_cs.c
@@ -85,7 +85,7 @@ struct multi_id {
        int multi;              /* 1 = multifunction, > 1 = # ports */
 };
 
-static struct multi_id multi_id[] = {
+static const struct multi_id multi_id[] = {
        { MANFID_OMEGA,   PRODID_OMEGA_QSP_100,         4 },
        { MANFID_QUATECH, PRODID_QUATECH_DUAL_RS232,    2 },
        { MANFID_QUATECH, PRODID_QUATECH_DUAL_RS232_D1, 2 },
@@ -354,8 +354,8 @@ next_tuple(client_handle_t handle, tuple_t * tuple, cisparse_t * parse)
 
 static int simple_config(dev_link_t *link)
 {
-       static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
-       static int size_table[2] = { 8, 16 };
+       static const kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
+       static const int size_table[2] = { 8, 16 };
        client_handle_t handle = link->handle;
        struct serial_info *info = link->priv;
        struct serial_cfg_mem *cfg_mem;