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    Subject[PATCH 1/5] Only define/declare kmsg_redirect when CONFIG_VT_CONSOLE is set
    Date
    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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