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Subject[PATCH 1/5] Only define/declare kmsg_redirect when CONFIG_VT_CONSOLE is set
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Since the variable is only used when CONFIG_VT_CONSOLE is set, we can save some
bytes of memory when CONFIG_VT_CONSOLE is not set.


Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
---
drivers/char/vt.c | 2 ++
include/linux/tty.h | 2 ++
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0c80c68..c3b1a86 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -187,7 +187,9 @@ static DECLARE_WORK(console_work, console_callback);
int fg_console;
int last_console;
int want_console = -1;
+#ifdef CONFIG_VT_CONSOLE
int kmsg_redirect;
+#endif

/*
* For each existing display, we have a pointer to console currently visible
diff --git a/include/linux/tty.h b/include/linux/tty.h
index f0f43d0..91bb1df 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -340,7 +340,9 @@ extern void tty_write_flush(struct tty_struct *);

extern struct ktermios tty_std_termios;

+#ifdef CONFIG_VT_CONSOLE
extern int kmsg_redirect;
+#endif

extern void console_init(void);
extern int vcs_init(void);
--
1.6.3.3


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