linux-kernel - Re: sysfs lockdep complaint

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Date:	Sat, 20 Feb 2010 16:28:07 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	Kernel development list <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: sysfs lockdep complaint

On Sat, 2010-02-20 at 23:20 +0800, Américo Wang wrote:
> On Sat, Feb 20, 2010 at 04:08:16PM +0100, Johannes Berg wrote:
> >On Sat, 2010-02-20 at 23:03 +0800, Américo Wang wrote:
> >
> >>  	fct->fan_type = pwm_fan;
> >>  	fct->ctrl.type = pwm_fan ? WF_CONTROL_PWM_FAN :
> WF_CONTROL_RPM_FAN;
> >> +	sysfs_attr_init(&fct->ctrl.attr);
> >
> >ah, needs to be "ctrl.attr.attr".
> >
> 
> Ouch, right... Updated.

I have this now, and that removed all the warnings:

---
 drivers/macintosh/windfarm_core.c         |    1 +
 drivers/macintosh/windfarm_smu_controls.c |    1 +
 kernel/module.c                           |    3 +++
 3 files changed, 5 insertions(+)

--- wireless-testing.orig/drivers/macintosh/windfarm_smu_controls.c	2010-02-20 16:05:55.738721565 +0100
+++ wireless-testing/drivers/macintosh/windfarm_smu_controls.c	2010-02-20 16:07:51.996717974 +0100
@@ -173,6 +173,7 @@ static struct smu_fan_control *smu_fan_c
 
 	fct->fan_type = pwm_fan;
 	fct->ctrl.type = pwm_fan ? WF_CONTROL_PWM_FAN : WF_CONTROL_RPM_FAN;
+	sysfs_attr_init(&fct->ctrl.attr.attr);
 
 	/* We use the name & location here the same way we do for SMU sensors,
 	 * see the comment in windfarm_smu_sensors.c. The locations are a bit
--- wireless-testing.orig/drivers/macintosh/windfarm_core.c	2010-02-20 16:15:14.701580166 +0100
+++ wireless-testing/drivers/macintosh/windfarm_core.c	2010-02-20 16:15:38.416369684 +0100
@@ -321,6 +321,7 @@ int wf_register_sensor(struct wf_sensor 
 	kref_init(&new_sr->ref);
 	list_add(&new_sr->link, &wf_sensors);
 
+	sysfs_attr_init(&new_sr->attr.attr);
 	new_sr->attr.attr.name = new_sr->name;
 	new_sr->attr.attr.mode = 0444;
 	new_sr->attr.show = wf_show_sensor;
--- wireless-testing.orig/kernel/module.c	2010-02-20 16:16:52.740706797 +0100
+++ wireless-testing/kernel/module.c	2010-02-20 16:22:52.499698256 +0100
@@ -1085,6 +1085,7 @@ static void add_sect_attrs(struct module
 		sect_attrs->nsections++;
 		sattr->mattr.show = module_sect_show;
 		sattr->mattr.store = NULL;
+		sysfs_attr_init(&sattr->mattr.attr);
 		sattr->mattr.attr.name = sattr->name;
 		sattr->mattr.attr.mode = S_IRUGO;
 		*(gattr++) = &(sattr++)->mattr.attr;
@@ -1178,6 +1179,7 @@ static void add_notes_attrs(struct modul
 		if (sect_empty(&sechdrs[i]))
 			continue;
 		if (sechdrs[i].sh_type == SHT_NOTE) {
+			sysfs_bin_attr_init(nattr);
 			nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
 			nattr->attr.mode = S_IRUGO;
 			nattr->size = sechdrs[i].sh_size;
@@ -1250,6 +1252,7 @@ int module_add_modinfo_attrs(struct modu
 		if (!attr->test ||
 		    (attr->test && attr->test(mod))) {
 			memcpy(temp_attr, attr, sizeof(*temp_attr));
+			sysfs_attr_init(&temp_attr->attr);
 			error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr);
 			++temp_attr;
 		}


johannes

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