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mm/damon: unify address range representation with damon_addr_range

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Currently, DAMON defines two identical structures for representing address
ranges: damon_system_ram_region and damon_addr_range.  Both structures
share the same semantic interpretation of a half-open interval [start,
end), where the start address is inclusive and the end address is
exclusive.

This duplication adds unnecessary redundancy and increases maintenance
overhead.  This patch replaces all uses of damon_system_ram_region with
the more generic damon_addr_range structure, ensuring a unified type
representation for address ranges within the DAMON subsystem.  The change
simplifies the codebase, improves readability, and avoids potential
inconsistencies in future modifications.

Link: https://lkml.kernel.org/r/20260129100845.281734-1-lienze@kylinos.cn
Signed-off-by: Enze Li <lienze@kylinos.cn>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Enze Li
2026-01-29 18:08:45 +08:00
committed by Andrew Morton
parent ad789a85b1
commit 9a2791e748
1 changed files with 2 additions and 13 deletions
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15
mm/damon/core.c
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@@ -2856,20 +2856,9 @@ done:
return 0;
}
/*
* struct damon_system_ram_region - System RAM resource address region of
* [@start, @end).
* @start: Start address of the region (inclusive).
* @end: End address of the region (exclusive).
*/
struct damon_system_ram_region {
unsigned long start;
unsigned long end;
};
static int walk_system_ram(struct resource *res, void *arg)
{
struct damon_system_ram_region *a = arg;
struct damon_addr_range *a = arg;
if (a->end - a->start < resource_size(res)) {
a->start = res->start;
@@ -2886,7 +2875,7 @@ static bool damon_find_biggest_system_ram(unsigned long *start,
unsigned long *end)
{
struct damon_system_ram_region arg = {};
struct damon_addr_range arg = {};
walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram);
if (arg.end <= arg.start)