edac: add edac_device_alloc_index()

Add edac_device_alloc_index(), because for MAPLE platform there may exist several EDAC driver modules that could make use of edac_device_ctl_info structure at the same time. The index allocation for these structures should be taken care of by EDAC core. [[email protected]: cleanups] Signed-off-by: Harry Ciao <[email protected]> Cc: Doug Thompson <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Kumar Gala <[email protected]> Cc: Paul Mackerras <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mna · Jun 18, 2009 · 1dc9b70 · 1dc9b70
1 parent 2a9036a
commit 1dc9b70
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Showing 3 changed files with 16 additions and 2 deletions.
diff --git a/drivers/edac/amd8111_edac.c b/drivers/edac/amd8111_edac.c
@@ -37,7 +37,6 @@
 #define AMD8111_EDAC_MOD_STR	"amd8111_edac"
 
 #define PCI_DEVICE_ID_AMD_8111_PCI	0x7460
-static int edac_dev_idx;
 
 enum amd8111_edac_devs {
 	LPC_BRIDGE = 0,
@@ -377,7 +376,7 @@ static int amd8111_dev_probe(struct pci_dev *dev,
 	 * edac_device_ctl_info, but make use of existing
 	 * one instead.
 	*/
-	dev_info->edac_idx = edac_dev_idx++;
+	dev_info->edac_idx = edac_device_alloc_index();
 	dev_info->edac_dev =
 		edac_device_alloc_ctl_info(0, dev_info->ctl_name, 1,
 					   NULL, 0, 0,

diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h
@@ -841,6 +841,7 @@ extern void edac_device_handle_ue(struct edac_device_ctl_info *edac_dev,
 				int inst_nr, int block_nr, const char *msg);
 extern void edac_device_handle_ce(struct edac_device_ctl_info *edac_dev,
 				int inst_nr, int block_nr, const char *msg);
+extern int edac_device_alloc_index(void);
 
 /*
  * edac_pci APIs

diff --git a/drivers/edac/edac_device.c b/drivers/edac/edac_device.c
@@ -490,6 +490,20 @@ void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
 	mutex_unlock(&device_ctls_mutex);
 }
 
+/*
+ * edac_device_alloc_index: Allocate a unique device index number
+ *
+ * Return:
+ *	allocated index number
+ */
+int edac_device_alloc_index(void)
+{
+	static atomic_t device_indexes = ATOMIC_INIT(0);
+
+	return atomic_inc_return(&device_indexes) - 1;
+}
+EXPORT_SYMBOL_GPL(edac_device_alloc_index);
+
 /**
  * edac_device_add_device: Insert the 'edac_dev' structure into the
  * edac_device global list and create sysfs entries associated with