--- linux-2.6.31.orig/drivers/mtd/ubi/io.c	2012-04-23 08:58:24.000000000 +0800
+++ linux-2.6.31/drivers/mtd/ubi/io.c	2012-04-23 09:01:51.000000000 +0800
@@ -173,7 +173,7 @@ retry:

 		ubi_err("error %d while reading %d bytes from PEB %d:%d, "
 			"read %zd bytes", err, len, pnum, offset, read);
-		ubi_dbg_dump_stack();
+		dump_stack();

 		/*
 		 * The driver should never return -EBADMSG if it failed to read
@@ -259,7 +259,7 @@ int ubi_io_write(struct ubi_device *ubi,
 	if (ubi_dbg_is_write_failure()) {
 		dbg_err("cannot write %d bytes to PEB %d:%d "
 			"(emulated)", len, pnum, offset);
-		ubi_dbg_dump_stack();
+		dump_stack();
 		return -EIO;
 	}

@@ -268,7 +268,7 @@ int ubi_io_write(struct ubi_device *ubi,
 	if (err) {
 		ubi_err("error %d while writing %d bytes to PEB %d:%d, written "
 			"%zd bytes", err, len, pnum, offset, written);
-		ubi_dbg_dump_stack();
+		dump_stack();
 	} else
 		ubi_assert(written == len);

@@ -323,7 +323,7 @@ retry:
 			goto retry;
 		}
 		ubi_err("cannot erase PEB %d, error %d", pnum, err);
-		ubi_dbg_dump_stack();
+		dump_stack();
 		return err;
 	}

@@ -341,7 +341,7 @@ retry:
 			goto retry;
 		}
 		ubi_err("cannot erase PEB %d", pnum);
-		ubi_dbg_dump_stack();
+		dump_stack();
 		return -EIO;
 	}