Messages in this thread Patch in this message | | | Date | Fri, 7 Jul 2006 04:01:56 -0700 | From | Andrew Morton <> | Subject | Re: 2.6.18-rc1: breaks boot on thinkpad x32 |
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On Fri, 7 Jul 2006 12:50:41 +0200 Pavel Machek <pavel@ucw.cz> wrote:
> Hi! > > I tried to update to 2.6.18-rc1-git, but got hang after > > acpiphp: Slot [1] registered > > ...but acpi=off failed to workaround the problem, it merely hung at > another place. I went back to 2.6.18-rc1, and it hung at same > place.
There have been no post-2.6.18-rc1 commits yet.
> 2.6.17 works. Any ideas?
Nope. Is the hang during initial bootup or during modprobing?
If during initial bootup, try adding initcall_debug to the boot command line.
If modular, work out which module is being bad?
It might be the cm_sbs driver. (initcall_debug will point at acpi_cm_sbs_init()). If so, this'll help.
diff -puN drivers/acpi/cm_sbs.c~acpi-initialise-cm_sbs_sem drivers/acpi/cm_sbs.c --- a/drivers/acpi/cm_sbs.c~acpi-initialise-cm_sbs_sem +++ a/drivers/acpi/cm_sbs.c @@ -39,50 +39,43 @@ ACPI_MODULE_NAME("cm_sbs") static struct proc_dir_entry *acpi_ac_dir; static struct proc_dir_entry *acpi_battery_dir; -static struct semaphore cm_sbs_sem; +static DEFINE_MUTEX(cm_sbs_mutex); -static int lock_ac_dir_cnt = 0; -static int lock_battery_dir_cnt = 0; +static int lock_ac_dir_cnt; +static int lock_battery_dir_cnt; struct proc_dir_entry *acpi_lock_ac_dir(void) { - - down(&cm_sbs_sem); - if (!acpi_ac_dir) { + mutex_lock(&cm_sbs_mutex); + if (!acpi_ac_dir) acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir); - } if (acpi_ac_dir) { lock_ac_dir_cnt++; } else { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Cannot create %s\n", ACPI_AC_CLASS)); } - up(&cm_sbs_sem); + mutex_unlock(&cm_sbs_mutex); return acpi_ac_dir; } - EXPORT_SYMBOL(acpi_lock_ac_dir); void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param) { - - down(&cm_sbs_sem); - if (acpi_ac_dir_param) { + mutex_lock(&cm_sbs_mutex); + if (acpi_ac_dir_param) lock_ac_dir_cnt--; - } if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) { remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir); acpi_ac_dir = 0; } - up(&cm_sbs_sem); + mutex_unlock(&cm_sbs_mutex); } - EXPORT_SYMBOL(acpi_unlock_ac_dir); struct proc_dir_entry *acpi_lock_battery_dir(void) { - - down(&cm_sbs_sem); + mutex_lock(&cm_sbs_mutex); if (!acpi_battery_dir) { acpi_battery_dir = proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir); @@ -93,39 +86,28 @@ struct proc_dir_entry *acpi_lock_battery ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Cannot create %s\n", ACPI_BATTERY_CLASS)); } - up(&cm_sbs_sem); + mutex_unlock(&cm_sbs_mutex); return acpi_battery_dir; } - EXPORT_SYMBOL(acpi_lock_battery_dir); void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param) { - - down(&cm_sbs_sem); - if (acpi_battery_dir_param) { + mutex_lock(&cm_sbs_mutex); + if (acpi_battery_dir_param) lock_battery_dir_cnt--; - } if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param && acpi_battery_dir) { remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir); acpi_battery_dir = 0; } - up(&cm_sbs_sem); + mutex_unlock(&cm_sbs_mutex); return; } - EXPORT_SYMBOL(acpi_unlock_battery_dir); static int __init acpi_cm_sbs_init(void) { - - if (acpi_disabled) - return 0; - - init_MUTEX(&cm_sbs_sem); - return 0; } - subsys_initcall(acpi_cm_sbs_init); _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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