From: Andy Ross <[email protected]> When vt.init_hide=1 is set, suppress output on newly created consoles until an affirmative switched to that console. This prevents boot output from displaying (and clobbering splash screens, etc...) without disabling the console entirely.
Signed-off-by: Andy Ross <[email protected]> Signed-off-by: Kirill A. Shutemov <[email protected]> --- drivers/tty/vt/vt.c | 7 +++++++ include/linux/console_struct.h | 3 ++- include/linux/vt.h | 2 ++ kernel/power/console.c | 2 -- 4 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 8fd8968..3966ff5 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -165,6 +165,9 @@ module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); static int cur_default = CUR_DEFAULT; module_param(cur_default, int, S_IRUGO | S_IWUSR); +static int init_hide; +module_param(init_hide, int, S_IRUGO); + /* * ignore_poke: don't unblank the screen when things are typed. This is * mainly for the privacy of braille terminal users. @@ -734,6 +737,7 @@ static void visual_init(struct vc_data *vc, int num, int init) __module_get(vc->vc_sw->owner); vc->vc_num = num; vc->vc_display_fg = &master_display_fg; + vc->vc_hidden = init_hide; vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; vc->vc_uni_pagedir = 0; vc->vc_hi_font_mask = 0; @@ -2336,6 +2340,9 @@ static void console_callback(struct work_struct *ignored) if (want_console >= 0) { if (want_console != fg_console && vc_cons_allocated(want_console)) { + if(want_console != SUSPEND_CONSOLE && + fg_console != SUSPEND_CONSOLE) + vc_cons[want_console].d->vc_hidden = 0; hide_cursor(vc_cons[fg_console].d); change_console(vc_cons[want_console].d); /* we only changed when the console had already diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h index 7f0c329..817db0e 100644 --- a/include/linux/console_struct.h +++ b/include/linux/console_struct.h @@ -91,6 +91,7 @@ struct vc_data { unsigned int vc_can_do_color : 1; unsigned int vc_report_mouse : 2; unsigned char vc_utf : 1; /* Unicode UTF-8 encoding */ + unsigned int vc_hidden : 1; /* Set by vt.init_hide=1 */ unsigned char vc_utf_count; int vc_utf_char; unsigned int vc_tab_stop[8]; /* Tab stops. 256 columns. */ @@ -134,6 +135,6 @@ extern void vc_SAK(struct work_struct *work); #define CUR_DEFAULT CUR_UNDERLINE -#define CON_IS_VISIBLE(conp) (*conp->vc_display_fg == conp) +#define CON_IS_VISIBLE(conp) (*conp->vc_display_fg == conp && !conp->vc_hidden) #endif /* _LINUX_CONSOLE_STRUCT_H */ diff --git a/include/linux/vt.h b/include/linux/vt.h index b186e04..0dc3e89 100644 --- a/include/linux/vt.h +++ b/include/linux/vt.h @@ -11,6 +11,8 @@ #define VT_UPDATE 0x0004 /* A bigger update occurred */ #define VT_PREWRITE 0x0005 /* A char is about to be written to the console */ +#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1) + #ifdef CONFIG_VT_CONSOLE extern int vt_kmsg_redirect(int new); diff --git a/kernel/power/console.c b/kernel/power/console.c index b1dc456..b74bdb8 100644 --- a/kernel/power/console.c +++ b/kernel/power/console.c @@ -10,8 +10,6 @@ #include <linux/module.h> #include "power.h" -#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1) - static int orig_fgconsole, orig_kmsg; int pm_prepare_console(void) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
