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class: change internal semaphore to a mutex

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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>
This commit is contained in:
Dave Young
2008-05-28 09:28:39 -07:00
committed by Greg Kroah-Hartman
parent d2a3b9146e
commit f75b1c60fc
3 changed files with 19 additions and 17 deletions
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4
drivers/base/base.h
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@@ -44,7 +44,7 @@ struct driver_private {
* @class_devices - list of devices associated with this class
* @class_interfaces - list of class_interfaces associated with this class
* @class_dirs - "glue" directory for virtual devices associated with this class
* @class_sem - semaphore to protect the children, devices, and interfaces lists.
* @class_mutex - mutex to protect the children, devices, and interfaces lists.
* @class - pointer back to the struct class that this structure is associated
* with.
*
@@ -57,7 +57,7 @@ struct class_private {
struct list_head class_devices;
struct list_head class_interfaces;
struct kset class_dirs;
struct semaphore class_sem;
struct mutex class_mutex;
struct class *class;
};
#define to_class(obj) \