tree be4acb81ea4ab7014047808ec2b2c908e8334f55
parent 61cc74fbb87af6aa551a06a370590c9bc07e29d9
author Louis Rilling <louis.rilling@kerlabs.com> 1259934762 +0100
committer Jens Axboe <jens.axboe@oracle.com> 1259940978 +0100

block: Fix io_context leak after failure of clone with CLONE_IO

With CLONE_IO, parent's io_context->nr_tasks is incremented, but never
decremented whenever copy_process() fails afterwards, which prevents
exit_io_context() from calling IO schedulers exit functions.

Give a task_struct to exit_io_context(), and call exit_io_context() instead of
put_io_context() in copy_process() cleanup path.

Signed-off-by: Louis Rilling <louis.rilling@kerlabs.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>