tree 3874581e08052b7f37f164110b3bd44ae5eff291
parent 78bd4d484f81a611ef6ff02f909e576cb9aac7f2
author Oleg Nesterov <oleg@tv-sign.ru> 1156142055 +0200
committer Jens Axboe <axboe@suse.de> 1156142055 +0200

[PATCH] Fix current_io_context() vs set_task_ioprio() race

I know nothing about io scheduler, but I suspect set_task_ioprio() is not safe.

current_io_context() initializes "struct io_context", then sets ->io_context.
set_task_ioprio() running on another cpu may see the changes out of order, so
->set_ioprio(ioc) may use io_context which was not initialized properly.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Jens Axboe <axboe@suse.de>