diff options
| author | Dave Young <hidave.darkstar@gmail.com> | 2008-05-28 09:28:39 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-21 21:54:52 -0700 |
| commit | f75b1c60fc1e53c4004a79ea0be071aa3318cdcc (patch) | |
| tree | 75728a6393f2e7568cd17ffd749fd3c4a4e1d95f /drivers/base/core.c | |
| parent | d2a3b9146e4f40c2e872d7567c996ef95083d802 (diff) | |
class: change internal semaphore to a mutex
Now that the lockdep infrastructure in the class core is in place, we
should be able to properly change the internal class semaphore to be a
mutex.
David wrote the original patch, and Greg fixed it up to apply properly
due to all of the recent changes in this area.
From: Dave Young <hidave.darkstar@gmail.com>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index b90ae6f7be8..c05b1159023 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -21,6 +21,7 @@ #include <linux/genhd.h> #include <linux/kallsyms.h> #include <linux/semaphore.h> +#include <linux/mutex.h> #include "base.h" #include "power/power.h" @@ -907,7 +908,7 @@ int device_add(struct device *dev) klist_add_tail(&dev->knode_parent, &parent->klist_children); if (dev->class) { - down(&dev->class->p->class_sem); + mutex_lock(&dev->class->p->class_mutex); /* tie the class to the device */ list_add_tail(&dev->node, &dev->class->p->class_devices); @@ -916,7 +917,7 @@ int device_add(struct device *dev) &dev->class->p->class_interfaces, node) if (class_intf->add_dev) class_intf->add_dev(dev, class_intf); - up(&dev->class->p->class_sem); + mutex_unlock(&dev->class->p->class_mutex); } Done: put_device(dev); @@ -1017,7 +1018,7 @@ void device_del(struct device *dev) if (dev->class) { device_remove_class_symlinks(dev); - down(&dev->class->p->class_sem); + mutex_lock(&dev->class->p->class_mutex); /* notify any interfaces that the device is now gone */ list_for_each_entry(class_intf, &dev->class->p->class_interfaces, node) @@ -1025,7 +1026,7 @@ void device_del(struct device *dev) class_intf->remove_dev(dev, class_intf); /* remove the device from the class list */ list_del_init(&dev->node); - up(&dev->class->p->class_sem); + mutex_unlock(&dev->class->p->class_mutex); } device_remove_file(dev, &uevent_attr); device_remove_attrs(dev); |