1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 783fc983417c..0a13bb35f044 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -152,6 +152,15 @@ struct mtd_info {
         int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
         int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
 
+        /* In blackbox flight recorder like scenarios we want to make successful
+           writes in interrupt context. panic_write() is only intended to be
+           called when its known the kernel is about to panic and we need the
+           write to succeed. Since the kernel is not going to be running for much
+           longer, this function can break locks and delay to ensure the write
+           succeeds (but not sleep). */
+
+        int (*panic_write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+
         int (*read_oob) (struct mtd_info *mtd, loff_t from,
                          struct mtd_oob_ops *ops);
         int (*write_oob) (struct mtd_info *mtd, loff_t to,