diff options
Diffstat (limited to 'drivers/tty/vt/vt.c')
| -rw-r--r-- | drivers/tty/vt/vt.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index fdd12f8c3deb..ec92f36ab5c4 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1056,6 +1056,13 @@ static void visual_init(struct vc_data *vc, int num, int init) vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; } + +static void visual_deinit(struct vc_data *vc) +{ + vc->vc_sw->con_deinit(vc); + module_put(vc->vc_sw->owner); +} + int vc_allocate(unsigned int currcons) /* return 0 on success */ { struct vt_notifier_param param; @@ -1103,6 +1110,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */ return 0; err_free: + visual_deinit(vc); kfree(vc); vc_cons[currcons].d = NULL; return -ENOMEM; @@ -1331,9 +1339,8 @@ struct vc_data *vc_deallocate(unsigned int currcons) param.vc = vc = vc_cons[currcons].d; atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); vcs_remove_sysfs(currcons); - vc->vc_sw->con_deinit(vc); + visual_deinit(vc); put_pid(vc->vt_pid); - module_put(vc->vc_sw->owner); vc_uniscr_set(vc, NULL); kfree(vc->vc_screenbuf); vc_cons[currcons].d = NULL; @@ -3815,6 +3822,8 @@ int con_is_bound(const struct consw *csw) { int i, bound = 0; + WARN_CONSOLE_UNLOCKED(); + for (i = 0; i < MAX_NR_CONSOLES; i++) { if (con_driver_map[i] == csw) { bound = 1; @@ -3827,6 +3836,20 @@ int con_is_bound(const struct consw *csw) EXPORT_SYMBOL(con_is_bound); /** + * con_is_visible - checks whether the current console is visible + * @vc: virtual console + * + * RETURNS: zero if not visible, nonzero if visible + */ +bool con_is_visible(const struct vc_data *vc) +{ + WARN_CONSOLE_UNLOCKED(); + + return *vc->vc_display_fg == vc; +} +EXPORT_SYMBOL(con_is_visible); + +/** * con_debug_enter - prepare the console for the kernel debugger * @sw: console driver * @@ -4159,6 +4182,8 @@ void do_blank_screen(int entering_gfx) struct vc_data *vc = vc_cons[fg_console].d; int i; + might_sleep(); + WARN_CONSOLE_UNLOCKED(); if (console_blanked) { |