linux-imx
Public
Source
committed bab5d988841static void q_set_targets_subrange_(struct queue *q, unsigned nr_elts, unsigned lbegin, unsigned lend)/* * Copyright (C) 2015 Red Hat. All rights reserved. * * This file is released under the GPL. *//*----------------------------------------------------------------*//* * Safe division functions that return zero on divide by zero. */static unsigned safe_div(unsigned n, unsigned d){ return d ? n / d : 0u;}static unsigned safe_mod(unsigned n, unsigned d){ return d ? n % d : 0u;}/*----------------------------------------------------------------*/struct entry { unsigned hash_next:28; unsigned prev:28; unsigned next:28; unsigned level:6; bool dirty:1; bool allocated:1; bool sentinel:1; bool pending_work:1; dm_oblock_t oblock;};/*----------------------------------------------------------------*//* * An entry_space manages a set of entries that we use for the queues. * The clean and dirty queues share entries, so this object is separate * from the queue itself. */struct entry_space { struct entry *begin; struct entry *end;};static int space_init(struct entry_space *es, unsigned nr_entries){ if (!nr_entries) { es->begin = es->end = NULL; return 0; } es->begin = vzalloc(array_size(nr_entries, sizeof(struct entry))); if (!es->begin) return -ENOMEM; es->end = es->begin + nr_entries; return 0;}static void space_exit(struct entry_space *es){ vfree(es->begin);}static struct entry *__get_entry(struct entry_space *es, unsigned block){ struct entry *e; e = es->begin + block; BUG_ON(e >= es->end); return e;