forked from mirrors/linux
93c177fd6f
In support of the CXL subsystem's use of 'struct range' to track decode address ranges, add a common range_contains() implementation with identical semantics as resource_contains(); The existing 'range_contains()' in lib/stackinit_kunit.c is namespaced with a 'stackinit_' prefix. Cc: Kees Cook <keescook@chromium.org> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Gregory Price <gregory.price@memverge.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Tested-by: Fan Ni <fan.ni@samsung.com> Link: https://lore.kernel.org/r/167601998163.1924368.6067392174077323935.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
42 lines
904 B
C
42 lines
904 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_RANGE_H
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#define _LINUX_RANGE_H
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#include <linux/types.h>
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struct range {
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u64 start;
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u64 end;
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};
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static inline u64 range_len(const struct range *range)
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{
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return range->end - range->start + 1;
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}
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static inline bool range_contains(struct range *r1, struct range *r2)
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{
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return r1->start <= r2->start && r1->end >= r2->end;
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}
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int add_range(struct range *range, int az, int nr_range,
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u64 start, u64 end);
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int add_range_with_merge(struct range *range, int az, int nr_range,
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u64 start, u64 end);
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void subtract_range(struct range *range, int az, u64 start, u64 end);
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int clean_sort_range(struct range *range, int az);
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void sort_range(struct range *range, int nr_range);
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#define MAX_RESOURCE ((resource_size_t)~0)
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static inline resource_size_t cap_resource(u64 val)
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{
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if (val > MAX_RESOURCE)
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return MAX_RESOURCE;
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return val;
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}
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#endif
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