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5d5de3a431
The size of bpf_cpumask is fixed, so there is no need to allocate many bpf_mem_caches for bpf_cpumask_ma, just one bpf_mem_cache is enough. Also add comments for bpf_mem_alloc_init() in bpf_mem_alloc.h to prevent future miuse. Signed-off-by: Hou Tao <houtao1@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20230216024821.2202916-1-houtao@huaweicloud.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
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#ifndef _BPF_MEM_ALLOC_H
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#define _BPF_MEM_ALLOC_H
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#include <linux/compiler_types.h>
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#include <linux/workqueue.h>
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struct bpf_mem_cache;
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struct bpf_mem_caches;
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struct bpf_mem_alloc {
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struct bpf_mem_caches __percpu *caches;
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struct bpf_mem_cache __percpu *cache;
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struct work_struct work;
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};
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/* 'size != 0' is for bpf_mem_alloc which manages fixed-size objects.
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* Alloc and free are done with bpf_mem_cache_{alloc,free}().
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*
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* 'size = 0' is for bpf_mem_alloc which manages many fixed-size objects.
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* Alloc and free are done with bpf_mem_{alloc,free}() and the size of
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* the returned object is given by the size argument of bpf_mem_alloc().
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*/
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int bpf_mem_alloc_init(struct bpf_mem_alloc *ma, int size, bool percpu);
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void bpf_mem_alloc_destroy(struct bpf_mem_alloc *ma);
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/* kmalloc/kfree equivalent: */
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void *bpf_mem_alloc(struct bpf_mem_alloc *ma, size_t size);
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void bpf_mem_free(struct bpf_mem_alloc *ma, void *ptr);
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/* kmem_cache_alloc/free equivalent: */
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void *bpf_mem_cache_alloc(struct bpf_mem_alloc *ma);
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void bpf_mem_cache_free(struct bpf_mem_alloc *ma, void *ptr);
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#endif /* _BPF_MEM_ALLOC_H */
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