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PM / VT: Cleanup #if defined uglyness and fix compile error 

Introduce the config option CONFIG_VT_CONSOLE_SLEEP in order to cleanup
the #if defined ugliness for the vt suspend support functions. Note that
CONFIG_VT_CONSOLE is already dependant on CONFIG_VT.

The function pm_set_vt_switch is actually dependant on CONFIG_VT and not
CONFIG_PM_SLEEP. This fixes a compile error when CONFIG_PM_SLEEP is
not set:

drivers/tty/vt/vt_ioctl.c:1794: error: redefinition of 'pm_set_vt_switch'
include/linux/suspend.h:17: error: previous definition of 'pm_set_vt_switch' was here

Also, remove the incorrect path from the comment in console.c.

[rjw: Replaced #if defined() with #ifdef in suspend.h.]

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
H Hartley Sweeten 2011-09-21 22:47:55 +02:00 committed by Rafael J. Wysocki
parent 528f7ce6e4
commit 37cce26b32
4 changed files with 12 additions and 7 deletions
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4
drivers/tty/Kconfig
View File

@ -60,6 +60,10 @@ config VT_CONSOLE
If unsure, say Y.
config VT_CONSOLE_SLEEP
def_bool y
depends on VT_CONSOLE && PM_SLEEP
config HW_CONSOLE
bool
depends on VT && !S390 && !UML

9
include/linux/suspend.h
View File

@ -8,15 +8,18 @@
#include <linux/mm.h>
#include <asm/errno.h>
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
#ifdef CONFIG_VT
extern void pm_set_vt_switch(int);
extern int pm_prepare_console(void);
extern void pm_restore_console(void);
#else
static inline void pm_set_vt_switch(int do_switch)
{
}
#endif
#ifdef CONFIG_VT_CONSOLE_SLEEP
extern int pm_prepare_console(void);
extern void pm_restore_console(void);
#else
static inline int pm_prepare_console(void)
{
return 0;

2
kernel/power/Makefile
View File

@ -2,7 +2,7 @@
ccflags-$(CONFIG_PM_DEBUG) := -DDEBUG
obj-$(CONFIG_PM) += main.o qos.o
obj-$(CONFIG_PM_SLEEP) += console.o
obj-$(CONFIG_VT_CONSOLE_SLEEP) += console.o
obj-$(CONFIG_FREEZER) += process.o
obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o

4
kernel/power/console.c
View File

@ -1,5 +1,5 @@
/*
* drivers/power/process.c - Functions for saving/restoring console.
* Functions for saving/restoring console.
*
* Originally from swsusp.
*/
@ -10,7 +10,6 @@
#include <linux/module.h>
#include "power.h"
#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
static int orig_fgconsole, orig_kmsg;
@ -32,4 +31,3 @@ void pm_restore_console(void)
vt_kmsg_redirect(orig_kmsg);
}
}
#endif