kbuild: document the KBUILD_KCONFIG env. variable

[linux-2.6-microblaze.git] / Documentation / vfio-mediated-device.txt

diff --git a/Documentation/vfio-mediated-device.txt b/Documentation/vfio-mediated-device.txt
index 1b39503..c3f69bc 100644 (file)
--- a/Documentation/vfio-mediated-device.txt
+++ b/Documentation/vfio-mediated-device.txt
@@ -145,6 +145,11 @@ The functions in the mdev_parent_ops structure are as follows:
 * create: allocate basic resources in a driver for a mediated device
 * remove: free resources in a driver when a mediated device is destroyed
 
+(Note that mdev-core provides no implicit serialization of create/remove
+callbacks per mdev parent device, per mdev type, or any other categorization.
+Vendor drivers are expected to be fully asynchronous in this respect or
+provide their own internal resource protection.)
+
 The callbacks in the mdev_parent_ops structure are as follows:
 
 * open: open callback of mediated device