Name
get_request_wait —
get a free request with retry
Synopsis
struct request * fsfuncget_request_wait ( | struct request_queue * q, |
| | int rw_flags, |
| | struct bio * bio); |
Arguments
q
request_queue to allocate request from
rw_flags
RW and SYNC flags
bio
bio to allocate request for (can be NULL)
Description
Get a free request from q. This function keeps retrying under memory
pressure and fails iff q is dead.
Must be callled with q->queue_lock held and,
Returns NULL on failure, with q->queue_lock held.
Returns !NULL on success, with q->queue_lock *not held*.