X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=kernel%2Fprintk.c;h=051d27e36a6c997e95215b90bfd3f50bfa7c9c08;hb=e779220ec3d70843cef5e9f410d7a0c287f46718;hp=4b47e59248df00375ce5fda81e760f89e14f9a22;hpb=d43a338e395371733a80ec473b40baac5f74d768;p=linux-2.6-omap-h63xx.git diff --git a/kernel/printk.c b/kernel/printk.c index 4b47e59248d..051d27e36a6 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -20,7 +20,6 @@ #include #include #include -#include #include #include #include @@ -450,13 +449,16 @@ static int printk_time = 1; #else static int printk_time = 0; #endif -module_param(printk_time, int, S_IRUGO | S_IWUSR); +module_param_named(time, printk_time, bool, S_IRUGO | S_IWUSR); static int __init printk_time_setup(char *str) { if (*str) return 0; printk_time = 1; + printk(KERN_NOTICE "The 'time' option is deprecated and " + "is scheduled for removal in early 2008\n"); + printk(KERN_NOTICE "Use 'printk.time=' instead\n"); return 1; } @@ -484,6 +486,9 @@ static int have_callable_console(void) * @fmt: format string * * This is printk(). It can be called from any context. We want it to work. + * Be aware of the fact that if oops_in_progress is not set, we might try to + * wake klogd up which could deadlock on runqueue lock if printk() is called + * from scheduler code. * * We try to grab the console_sem. If we succeed, it's easy - we log the output and * call the console drivers. If we fail to get the semaphore we place the output @@ -655,7 +660,7 @@ static void call_console_drivers(unsigned long start, unsigned long end) */ static int __init console_setup(char *str) { - char name[sizeof(console_cmdline[0].name)]; + char buf[sizeof(console_cmdline[0].name) + 4]; /* 4 for index */ char *s, *options; int idx; @@ -663,27 +668,27 @@ static int __init console_setup(char *str) * Decode str into name, index, options. */ if (str[0] >= '0' && str[0] <= '9') { - strcpy(name, "ttyS"); - strncpy(name + 4, str, sizeof(name) - 5); + strcpy(buf, "ttyS"); + strncpy(buf + 4, str, sizeof(buf) - 5); } else { - strncpy(name, str, sizeof(name) - 1); + strncpy(buf, str, sizeof(buf) - 1); } - name[sizeof(name) - 1] = 0; + buf[sizeof(buf) - 1] = 0; if ((options = strchr(str, ',')) != NULL) *(options++) = 0; #ifdef __sparc__ if (!strcmp(str, "ttya")) - strcpy(name, "ttyS0"); + strcpy(buf, "ttyS0"); if (!strcmp(str, "ttyb")) - strcpy(name, "ttyS1"); + strcpy(buf, "ttyS1"); #endif - for (s = name; *s; s++) + for (s = buf; *s; s++) if ((*s >= '0' && *s <= '9') || *s == ',') break; idx = simple_strtoul(s, NULL, 10); *s = 0; - add_preferred_console(name, idx, options); + add_preferred_console(buf, idx, options); return 1; } __setup("console=", console_setup); @@ -710,7 +715,7 @@ int __init add_preferred_console(char *name, int idx, char *options) * See if this tty is not yet registered, and * if we have a slot free. */ - for(i = 0; i < MAX_CMDLINECONSOLES && console_cmdline[i].name[0]; i++) + for (i = 0; i < MAX_CMDLINECONSOLES && console_cmdline[i].name[0]; i++) if (strcmp(console_cmdline[i].name, name) == 0 && console_cmdline[i].index == idx) { selected_console = i; @@ -727,6 +732,25 @@ int __init add_preferred_console(char *name, int idx, char *options) return 0; } +int __init update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options) +{ + struct console_cmdline *c; + int i; + + for (i = 0; i < MAX_CMDLINECONSOLES && console_cmdline[i].name[0]; i++) + if (strcmp(console_cmdline[i].name, name) == 0 && + console_cmdline[i].index == idx) { + c = &console_cmdline[i]; + memcpy(c->name, name_new, sizeof(c->name)); + c->name[sizeof(c->name) - 1] = 0; + c->options = options; + c->index = idx_new; + return i; + } + /* not found */ + return -1; +} + #ifndef CONFIG_DISABLE_CONSOLE_SUSPEND /** * suspend_console - suspend the console subsystem @@ -931,10 +955,21 @@ void register_console(struct console *console) { int i; unsigned long flags; + struct console *bootconsole = NULL; + + if (console_drivers) { + if (console->flags & CON_BOOT) + return; + if (console_drivers->flags & CON_BOOT) + bootconsole = console_drivers; + } - if (preferred_console < 0) + if (preferred_console < 0 || bootconsole || !console_drivers) preferred_console = selected_console; + if (console->early_setup) + console->early_setup(); + /* * See if we want to use this console driver. If we * didn't select a console we take the first one @@ -978,9 +1013,15 @@ void register_console(struct console *console) if (!(console->flags & CON_ENABLED)) return; - if (console_drivers && (console_drivers->flags & CON_BOOT)) { - unregister_console(console_drivers); + if (bootconsole && (console->flags & CON_CONSDEV)) { + printk(KERN_INFO "console handover: boot [%s%d] -> real [%s%d]\n", + bootconsole->name, bootconsole->index, + console->name, console->index); + unregister_console(bootconsole); console->flags &= ~CON_PRINTBUFFER; + } else { + printk(KERN_INFO "console [%s%d] enabled\n", + console->name, console->index); } /* @@ -1030,16 +1071,11 @@ int unregister_console(struct console *console) } } - /* If last console is removed, we re-enable picking the first - * one that gets registered. Without that, pmac early boot console - * would prevent fbcon from taking over. - * + /* * If this isn't the last console and it has CON_CONSDEV set, we * need to set it on the next preferred console. */ - if (console_drivers == NULL) - preferred_console = selected_console; - else if (console->flags & CON_CONSDEV) + if (console_drivers != NULL && console->flags & CON_CONSDEV) console_drivers->flags |= CON_CONSDEV; release_console_sem();