https://github.com/torvalds/linux
Revision 34c5c89890d6295621b6f09b18e7ead9046634bc authored by Linus Torvalds on 23 May 2021, 01:20:20 UTC, committed by Linus Torvalds on 23 May 2021, 01:20:20 UTC
Merge misc fixes from Andrew Morton: "10 patches. Subsystems affected by this patch series: mm (pagealloc, gup, kasan, and userfaultfd), ipc, selftests, watchdog, bitmap, procfs, and lib" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: userfaultfd: hugetlbfs: fix new flag usage in error path lib: kunit: suppress a compilation warning of frame size proc: remove Alexey from MAINTAINERS linux/bits.h: fix compilation error with GENMASK watchdog: reliable handling of timestamps kasan: slab: always reset the tag in get_freepointer_safe() tools/testing/selftests/exec: fix link error ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry Revert "mm/gup: check page posion status for coredump." mm/shuffle: fix section mismatch warning
Tip revision: 34c5c89890d6295621b6f09b18e7ead9046634bc authored by Linus Torvalds on 23 May 2021, 01:20:20 UTC
Merge branch 'akpm' (patches from Andrew)
Merge branch 'akpm' (patches from Andrew)
Tip revision: 34c5c89
blk-mq-rdma.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2017 Sagi Grimberg.
*/
#include <linux/blk-mq.h>
#include <linux/blk-mq-rdma.h>
#include <rdma/ib_verbs.h>
/**
* blk_mq_rdma_map_queues - provide a default queue mapping for rdma device
* @map: CPU to hardware queue map.
* @dev: rdma device to provide a mapping for.
* @first_vec: first interrupt vectors to use for queues (usually 0)
*
* This function assumes the rdma device @dev has at least as many available
* interrupt vetors as @set has queues. It will then query it's affinity mask
* and built queue mapping that maps a queue to the CPUs that have irq affinity
* for the corresponding vector.
*
* In case either the driver passed a @dev with less vectors than
* @set->nr_hw_queues, or @dev does not provide an affinity mask for a
* vector, we fallback to the naive mapping.
*/
int blk_mq_rdma_map_queues(struct blk_mq_queue_map *map,
struct ib_device *dev, int first_vec)
{
const struct cpumask *mask;
unsigned int queue, cpu;
for (queue = 0; queue < map->nr_queues; queue++) {
mask = ib_get_vector_affinity(dev, first_vec + queue);
if (!mask)
goto fallback;
for_each_cpu(cpu, mask)
map->mq_map[cpu] = map->queue_offset + queue;
}
return 0;
fallback:
return blk_mq_map_queues(map);
}
EXPORT_SYMBOL_GPL(blk_mq_rdma_map_queues);
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