This patch-set restructures and cleans up struct hv_storvsc_request. In the current code, two data structures: struct hv_storvsc_request and struct storvsc_request_extension together are used to carry the I/O state and there are many issues with this current architecture: 1) The memory for extension data structure is allocatted just after the data buffer field in struct hv_storvsc_request resulting in comments such as this in struct blkvsc_request (blkvsc_drv.c): /* * !!!DO NOT ADD ANYTHING BELOW HERE!!! Otherwise, memory can overlap, * because - The extension buffer falls right here and is pointed to by * request.Extension; * Which sounds like a horrible idea, who designed this? */ 2) State is unnecessarily replicated in both struct hv_storvsc_request and the struct vstor_packet that is embedded in struct storvsc_request_extension. This patch-set addresses the above issues by geting rid of replicated state and consolidating all necessary state into a single data structure. We also deal with a range of other cleanups in this patch-set: 1) Use completion primitives to wait for completion. 2) Get rid of the synch primitive in struct blkvsc_request 3) Get rid of the need for struct hv_device to be the first element of struct host_device_context. Regards, K. Y _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
