de6cc6515a
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 77 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.837555891@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* SPU file system
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*
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
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*
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* Author: Arnd Bergmann <arndb@de.ibm.com>
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*/
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#include <linux/list.h>
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#include <linux/slab.h>
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#include "spufs.h"
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struct spu_gang *alloc_spu_gang(void)
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{
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struct spu_gang *gang;
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gang = kzalloc(sizeof *gang, GFP_KERNEL);
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if (!gang)
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goto out;
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kref_init(&gang->kref);
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mutex_init(&gang->mutex);
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mutex_init(&gang->aff_mutex);
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INIT_LIST_HEAD(&gang->list);
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INIT_LIST_HEAD(&gang->aff_list_head);
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out:
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return gang;
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}
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static void destroy_spu_gang(struct kref *kref)
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{
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struct spu_gang *gang;
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gang = container_of(kref, struct spu_gang, kref);
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WARN_ON(gang->contexts || !list_empty(&gang->list));
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kfree(gang);
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}
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struct spu_gang *get_spu_gang(struct spu_gang *gang)
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{
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kref_get(&gang->kref);
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return gang;
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}
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int put_spu_gang(struct spu_gang *gang)
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{
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return kref_put(&gang->kref, &destroy_spu_gang);
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}
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void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx)
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{
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mutex_lock(&gang->mutex);
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ctx->gang = get_spu_gang(gang);
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list_add(&ctx->gang_list, &gang->list);
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gang->contexts++;
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mutex_unlock(&gang->mutex);
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}
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void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx)
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{
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mutex_lock(&gang->mutex);
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WARN_ON(ctx->gang != gang);
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if (!list_empty(&ctx->aff_list)) {
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list_del_init(&ctx->aff_list);
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gang->aff_flags &= ~AFF_OFFSETS_SET;
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}
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list_del_init(&ctx->gang_list);
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gang->contexts--;
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mutex_unlock(&gang->mutex);
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put_spu_gang(gang);
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}
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