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-rw-r--r--include/linux/pstore.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index ea567321ae3..2ca8cde5459 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -35,10 +35,12 @@ struct pstore_info {
spinlock_t buf_lock; /* serialize access to 'buf' */
char *buf;
size_t bufsize;
+ struct mutex read_mutex; /* serialize open/read/close */
int (*open)(struct pstore_info *psi);
int (*close)(struct pstore_info *psi);
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
- struct timespec *time, struct pstore_info *psi);
+ struct timespec *time, char **buf,
+ struct pstore_info *psi);
int (*write)(enum pstore_type_id type, u64 *id,
unsigned int part, size_t size, struct pstore_info *psi);
int (*erase)(enum pstore_type_id type, u64 id,