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authorBorislav Petkov <borislav.petkov@amd.com>2010-09-02 17:26:48 +0200
committerBorislav Petkov <bp@amd64.org>2010-10-21 14:47:59 +0200
commit30e1f7a8122145f44f45c95366e27b6bb0b08428 (patch)
treead1b549b88319b074505eed41914dd7b70f5434c /drivers/edac/edac_stub.c
parent7cfd4a87441f5ca3018fdd1f7ad67e8a73a05dc2 (diff)
EDAC: Export edac sysfs class to users.
Move toplevel sysfs class to the stub and make it available to non-modularized code too. Add proper refcounting of its users and move the registration functionality into the reference counting routines. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Diffstat (limited to 'drivers/edac/edac_stub.c')
-rw-r--r--drivers/edac/edac_stub.c51
1 files changed, 47 insertions, 4 deletions
diff --git a/drivers/edac/edac_stub.c b/drivers/edac/edac_stub.c
index 20b428aa155e..aab970760b75 100644
--- a/drivers/edac/edac_stub.c
+++ b/drivers/edac/edac_stub.c
@@ -3,10 +3,13 @@
*
* Author: Dave Jiang <djiang@mvista.com>
*
- * 2007 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
+ * 2007 (c) MontaVista Software, Inc.
+ * 2010 (c) Advanced Micro Devices Inc.
+ * Borislav Petkov <borislav.petkov@amd.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
*
*/
#include <linux/module.h>
@@ -23,6 +26,8 @@ EXPORT_SYMBOL_GPL(edac_handlers);
int edac_err_assert = 0;
EXPORT_SYMBOL_GPL(edac_err_assert);
+static atomic_t edac_class_valid = ATOMIC_INIT(0);
+
/*
* called to determine if there is an EDAC driver interested in
* knowing an event (such as NMI) occurred
@@ -44,3 +49,41 @@ void edac_atomic_assert_error(void)
edac_err_assert++;
}
EXPORT_SYMBOL_GPL(edac_atomic_assert_error);
+
+/*
+ * sysfs object: /sys/devices/system/edac
+ * need to export to other files
+ */
+struct sysdev_class edac_class = {
+ .name = "edac",
+};
+EXPORT_SYMBOL_GPL(edac_class);
+
+/* return pointer to the 'edac' node in sysfs */
+struct sysdev_class *edac_get_sysfs_class(void)
+{
+ int err = 0;
+
+ if (atomic_read(&edac_class_valid))
+ goto out;
+
+ /* create the /sys/devices/system/edac directory */
+ err = sysdev_class_register(&edac_class);
+ if (err) {
+ printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
+ return NULL;
+ }
+
+out:
+ atomic_inc(&edac_class_valid);
+ return &edac_class;
+}
+EXPORT_SYMBOL_GPL(edac_get_sysfs_class);
+
+void edac_put_sysfs_class(void)
+{
+ /* last user unregisters it */
+ if (atomic_dec_and_test(&edac_class_valid))
+ sysdev_class_unregister(&edac_class);
+}
+EXPORT_SYMBOL_GPL(edac_put_sysfs_class);