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https://github.com/torvalds/linux
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20c2df83d2
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.
This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
/*
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* IBM eServer eHCA Infiniband device driver for Linux on POWER
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*
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* PD functions
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*
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* Authors: Christoph Raisch <raisch@de.ibm.com>
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*
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* Copyright (c) 2005 IBM Corporation
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*
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* All rights reserved.
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*
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* This source code is distributed under a dual license of GPL v2.0 and OpenIB
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* BSD.
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*
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* OpenIB BSD License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <asm/current.h>
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#include "ehca_tools.h"
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#include "ehca_iverbs.h"
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static struct kmem_cache *pd_cache;
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struct ib_pd *ehca_alloc_pd(struct ib_device *device,
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struct ib_ucontext *context, struct ib_udata *udata)
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{
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struct ehca_pd *pd;
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pd = kmem_cache_zalloc(pd_cache, GFP_KERNEL);
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if (!pd) {
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ehca_err(device, "device=%p context=%p out of memory",
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device, context);
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return ERR_PTR(-ENOMEM);
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}
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pd->ownpid = current->tgid;
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/*
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* Kernel PD: when device = -1, 0
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* User PD: when context != -1
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*/
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if (!context) {
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/*
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* Kernel PDs after init reuses always
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* the one created in ehca_shca_reopen()
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*/
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struct ehca_shca *shca = container_of(device, struct ehca_shca,
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ib_device);
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pd->fw_pd.value = shca->pd->fw_pd.value;
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} else
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pd->fw_pd.value = (u64)pd;
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return &pd->ib_pd;
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}
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int ehca_dealloc_pd(struct ib_pd *pd)
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{
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u32 cur_pid = current->tgid;
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struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
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if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
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my_pd->ownpid != cur_pid) {
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ehca_err(pd->device, "Invalid caller pid=%x ownpid=%x",
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cur_pid, my_pd->ownpid);
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return -EINVAL;
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}
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kmem_cache_free(pd_cache,
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container_of(pd, struct ehca_pd, ib_pd));
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return 0;
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}
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int ehca_init_pd_cache(void)
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{
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pd_cache = kmem_cache_create("ehca_cache_pd",
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sizeof(struct ehca_pd), 0,
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SLAB_HWCACHE_ALIGN,
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NULL);
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if (!pd_cache)
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return -ENOMEM;
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return 0;
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}
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void ehca_cleanup_pd_cache(void)
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{
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if (pd_cache)
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kmem_cache_destroy(pd_cache);
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}
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