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authorDan Williams <dan.j.williams@intel.com>2016-01-05 10:50:23 +0300
committerDan Williams <dan.j.williams@intel.com>2016-01-09 19:39:04 +0300
commit16263ff6c72eb4cc00aa287230144dda12ccad12 (patch)
treeb92a29f5508d3dd5f494e4399bf0be799b93e319 /include/linux/badblocks.h
parent20a308f09e0d29ce6f5a4114cc476a998d569bfb (diff)
downloadlinux-16263ff6c72eb4cc00aa287230144dda12ccad12.tar.xz
block, badblocks: introduce devm_init_badblocks
Provide a devres interface for initializing a badblocks instance. The pmem driver has several scenarios where it will be beneficial to have this structure automatically freed when the device is disabled / fails probe. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/badblocks.h')
-rw-r--r--include/linux/badblocks.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/include/linux/badblocks.h b/include/linux/badblocks.h
index 2d98c026c57f..c3bdf8c59480 100644
--- a/include/linux/badblocks.h
+++ b/include/linux/badblocks.h
@@ -2,6 +2,7 @@
#define _LINUX_BADBLOCKS_H
#include <linux/seqlock.h>
+#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/types.h>
@@ -23,6 +24,7 @@
#define MAX_BADBLOCKS (PAGE_SIZE/8)
struct badblocks {
+ struct device *dev; /* set by devm_init_badblocks */
int count; /* count of bad blocks */
int unacked_exist; /* there probably are unacknowledged
* bad blocks. This is only cleared
@@ -49,5 +51,15 @@ ssize_t badblocks_store(struct badblocks *bb, const char *page, size_t len,
int unack);
int badblocks_init(struct badblocks *bb, int enable);
void badblocks_exit(struct badblocks *bb);
-
+struct device;
+int devm_init_badblocks(struct device *dev, struct badblocks *bb);
+static inline void devm_exit_badblocks(struct device *dev, struct badblocks *bb)
+{
+ if (bb->dev != dev) {
+ dev_WARN_ONCE(dev, 1, "%s: badblocks instance not associated\n",
+ __func__);
+ return;
+ }
+ badblocks_exit(bb);
+}
#endif