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05dfaadde4
They are used by the DRM drivers in Linux 6.7. Bump `FreeBSD_version` because external drivers that use `struct shrinker` will have to be recompiled. Reviewed by: bz Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D48747
79 lines
2.9 KiB
C
79 lines
2.9 KiB
C
/*-
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* Copyright (c) 2020 Emmanuel Vadot <manu@FreeBSD.org>
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _LINUXKPI_LINUX_SHRINKER_H_
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#define _LINUXKPI_LINUX_SHRINKER_H_
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#include <sys/queue.h>
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#include <linux/bitops.h>
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#include <linux/gfp.h>
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struct shrink_control {
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gfp_t gfp_mask;
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unsigned long nr_to_scan;
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unsigned long nr_scanned;
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};
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struct shrinker {
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unsigned long (*count_objects)(struct shrinker *, struct shrink_control *);
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unsigned long (*scan_objects)(struct shrinker *, struct shrink_control *);
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int seeks;
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unsigned int flags;
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void * private_data;
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long batch;
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TAILQ_ENTRY(shrinker) next;
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};
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#define SHRINK_STOP (~0UL)
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#define DEFAULT_SEEKS 2
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#define SHRINKER_REGISTERED BIT(0)
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#define SHRINKER_ALLOCATED BIT(1)
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struct shrinker *linuxkpi_shrinker_alloc(
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unsigned int flags, const char *fmt, ...);
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int linuxkpi_register_shrinker(struct shrinker *s);
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void linuxkpi_unregister_shrinker(struct shrinker *s);
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void linuxkpi_shrinker_free(struct shrinker *shrinker);
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void linuxkpi_synchronize_shrinkers(void);
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#define shrinker_alloc(flags, fmt, ...) \
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linuxkpi_shrinker_alloc(flags, fmt __VA_OPT__(,) __VA_ARGS__)
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#define shrinker_register(shrinker) \
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linuxkpi_register_shrinker(shrinker)
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#define shrinker_free(shrinker) \
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linuxkpi_shrinker_free(shrinker)
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#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60000
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#define register_shrinker(s, ...) linuxkpi_register_shrinker(s)
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#else
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#define register_shrinker(s) linuxkpi_register_shrinker(s)
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#endif
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#define unregister_shrinker(s) linuxkpi_unregister_shrinker(s)
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#define synchronize_shrinkers() linuxkpi_synchronize_shrinkers()
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#endif /* _LINUXKPI_LINUX_SHRINKER_H_ */
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