[PATCH] sysfs.txt: mention that store method buffers are null-terminated

[ulfalizer . lkml]

From: Ulf Magnusson <ulfalizer@xxxxxxxxx>

Without knowing this, the use of sysfs_streq() becomes puzzling.

The termination happens in kernfs_fop_write().

Signed-off-by: Ulf Magnusson <ulfalizer@xxxxxxxxx>
---
 Documentation/filesystems/sysfs.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
index 9494afb..575e997 100644
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -198,6 +198,9 @@ implementations:
   entire file, modify the values it wishes to change, then write the
   entire buffer back. 
 
+  A terminating null is added after the data on stores. This makes
+  functions like sysfs_streq() safe to use.
+
   Attribute method implementations should operate on an identical
   buffer when reading and writing values. 
 
-- 
2.1.4

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