[PATCH] mtd: add documentation about locking context of MTD API

[Robert Jarzmik]

Add a comment to mtd header for MTD drivers writters, so that they
know that each function in the MTD API, ie. in the mtd_info
structure, is called in a sleeping context.

Signed-off-by: Robert Jarzmik <robert.jarzmik at free.fr>
---
 include/linux/mtd/mtd.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index cf5ea8c..4a417e7 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -176,6 +176,11 @@ struct mtd_info {
 	/*
 	 * Do not call via these pointers, use corresponding mtd_*()
 	 * wrappers instead.
+	 *
+	 * All the following functions are called in a sleeping context, ie. it
+	 * can be safely assumed in mtd drivers that :
+	 *  - might_sleep() == 1
+	 *  - msleep(), mutex_lock() and co are authorized
 	 */
 	int (*_erase) (struct mtd_info *mtd, struct erase_info *instr);
 	int (*_point) (struct mtd_info *mtd, loff_t from, size_t len,
-- 
1.7.5.4