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authorMatthew Wilcox <matthew@wil.cx>2008-05-28 09:28:39 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-21 21:54:52 -0700
commitd2a3b9146e4f40c2e872d7567c996ef95083d802 (patch)
treec95bd0a155e1c868fcaffeb0949dd3441203f72a /drivers/base/class.c
parent1e41250863cd4de5ffa0678c405d001ca5b62796 (diff)
downloadop-kernel-dev-d2a3b9146e4f40c2e872d7567c996ef95083d802.zip
op-kernel-dev-d2a3b9146e4f40c2e872d7567c996ef95083d802.tar.gz
class: add lockdep infrastructure
This adds the infrastructure to properly handle lockdep issues when the internal class semaphore is changed to a mutex. Matthew wrote the original patch, and Greg fixed it up to work properly with the class_create() function. From: Matthew Wilcox <matthew@wil.cx> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Dave Young <hidave.darkstar@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/class.c')
-rw-r--r--drivers/base/class.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c
index d24d211..8900056 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -134,7 +134,7 @@ static void remove_class_attrs(struct class *cls)
}
}
-int class_register(struct class *cls)
+int __class_register(struct class *cls, struct lock_class_key *key)
{
struct class_private *cp;
int error;
@@ -178,6 +178,7 @@ int class_register(struct class *cls)
class_put(cls);
return error;
}
+EXPORT_SYMBOL_GPL(__class_register);
void class_unregister(struct class *cls)
{
@@ -203,7 +204,8 @@ static void class_create_release(struct class *cls)
* Note, the pointer created here is to be destroyed when finished by
* making a call to class_destroy().
*/
-struct class *class_create(struct module *owner, const char *name)
+struct class *__class_create(struct module *owner, const char *name,
+ struct lock_class_key *key)
{
struct class *cls;
int retval;
@@ -218,7 +220,7 @@ struct class *class_create(struct module *owner, const char *name)
cls->owner = owner;
cls->class_release = class_create_release;
- retval = class_register(cls);
+ retval = __class_register(cls, key);
if (retval)
goto error;
@@ -228,6 +230,7 @@ error:
kfree(cls);
return ERR_PTR(retval);
}
+EXPORT_SYMBOL_GPL(__class_create);
/**
* class_destroy - destroys a struct class structure
@@ -412,9 +415,7 @@ int __init classes_init(void)
EXPORT_SYMBOL_GPL(class_create_file);
EXPORT_SYMBOL_GPL(class_remove_file);
-EXPORT_SYMBOL_GPL(class_register);
EXPORT_SYMBOL_GPL(class_unregister);
-EXPORT_SYMBOL_GPL(class_create);
EXPORT_SYMBOL_GPL(class_destroy);
EXPORT_SYMBOL_GPL(class_interface_register);
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