tree 7f0c96c886f2d0e4992508fb79a7b2ab3c05dc6b
parent 5fe6eaa1f9a00b9a5927e3b791ecad2f3eaab130
author Chuck Lever <chuck.lever@oracle.com> 1473951329 -0400
committer Anna Schumaker <Anna.Schumaker@Netapp.com> 1474304917 -0400

SUNRPC: Generalize the RPC buffer release API

xprtrdma needs to allocate the Call and Reply buffers separately.
TBH, the reliance on using a single buffer for the pair of XDR
buffers is transport implementation-specific.

Instead of passing just the rq_buffer into the buf_free method, pass
the task structure and let buf_free take care of freeing both
XDR buffers at once.

There's a micro-optimization here. In the common case, both
xprt_release and the transport's buf_free method were checking if
rq_buffer was NULL. Now the check is done only once per RPC.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>