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kernel/range: Uplevel the cxl subsystem's range_contains() helper

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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>
This commit is contained in:
Dan Williams
2023-02-10 01:06:21 -08:00
parent 9995576cef
commit 93c177fd6f
3 changed files with 8 additions and 8 deletions
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5
include/linux/range.h
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@@ -13,6 +13,11 @@ static inline u64 range_len(const struct range *range)
return range->end - range->start + 1;
}
static inline bool range_contains(struct range *r1, struct range *r2)
{
return r1->start <= r2->start && r1->end >= r2->end;
}
int add_range(struct range *range, int az, int nr_range,
u64 start, u64 end);