[SERIAL] sparc: Infrastructure to fix section mismatch bugs.

This patch against 2.6.23 sparc-2.6.git contains a number of minor
cleanups of the sparc serial drivers.  Initially I fixed this build
warning:

WARNING: vmlinux.o(.text+0x107a2c): Section mismatch: reference to .init.text:add_preferred_console (between 'sunserial_console_match' and 'sunserial_console_termios')

which is done by declaring sunserial_console_match() as __init.  This
resulted in build warnings on sunserial_current_minor.  To resolve
these the variable was changed so it is no longer global, and to hide
operations on it inside 2 new functions. These functions handle the
UART minor handling code that is common to all sparc serial drivers.

These changes allowed to clean up the uart counters in all the sparc
serial drivers, and the administration of minor device numbers.

Lastly, sunserial_console_termios() does not need to be exported since
it is only called from non-modular code.

Sadly, the following build warning still exists:

WARNING: vmlinux.o(__ksymtab+0x2910): Section mismatch: reference to .init.text:sunserial_console_match (between '__ksymtab_sunserial_console_match' and '__ksymtab_sunserial_unregister_minors')

This could be resolved by not exporting sunserial_console_match(), but
this is not possible at the moment because it is being called from
modular code. On the other hand, this is a bogus warning since it
comes from a ksymtab section.

Signed-off-by: Martin Habets <errandir_news@mph.eclipse.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 12 deletions

diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index ff610c23314..543f93741e6 100644
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -832,7 +832,6 @@ static struct uart_driver sunsab_reg = {
 };
 
 static struct uart_sunsab_port *sunsab_ports;
-static int num_channels;
 
 #ifdef CONFIG_SERIAL_SUNSAB_CONSOLE
 
@@ -1102,8 +1101,8 @@ static int __init sunsab_init(void)
 {
 	struct device_node *dp;
 	int err;
+	int num_channels = 0;
 
-	num_channels = 0;
 	for_each_node_by_name(dp, "se")
 		num_channels += 2;
 	for_each_node_by_name(dp, "serial") {
@@ -1117,20 +1116,14 @@ static int __init sunsab_init(void)
 		if (!sunsab_ports)
 			return -ENOMEM;
 
-		sunsab_reg.minor = sunserial_current_minor;
-		sunsab_reg.nr = num_channels;
 		sunsab_reg.cons = SUNSAB_CONSOLE();
-
-		err = uart_register_driver(&sunsab_reg);
+		err = sunserial_register_minors(&sunsab_reg, num_channels);
 		if (err) {
 			kfree(sunsab_ports);
 			sunsab_ports = NULL;
 
 			return err;
 		}
-
-		sunsab_reg.tty_driver->name_base = sunsab_reg.minor - 64;
-		sunserial_current_minor += num_channels;
 	}
 
 	return of_register_driver(&sab_driver, &of_bus_type);
@@ -1139,9 +1132,8 @@ static int __init sunsab_init(void)
 static void __exit sunsab_exit(void)
 {
 	of_unregister_driver(&sab_driver);
-	if (num_channels) {
-		sunserial_current_minor -= num_channels;
-		uart_unregister_driver(&sunsab_reg);
+	if (sunsab_reg.nr) {
+		sunserial_unregister_minors(&sunsab_reg, sunsab_reg.nr);
 	}
 
 	kfree(sunsab_ports);