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mm/damon/core: remove damon_set_region_biggest_system_ram_default()

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Now nobody is using damon_set_region_biggest_system_ram_default().  Remove
it.

Link: https://lore.kernel.org/20260429041232.90257-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2026-04-28 21:12:26 -07:00 committed by Andrew Morton
parent e17741ad08
commit 3a870b4377
2 changed files with 0 additions and 69 deletions
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5
include/linux/damon.h
View File

@ -1015,11 +1015,6 @@ int damon_set_region_system_rams_default(struct damon_target *t,
unsigned long addr_unit,
unsigned long min_region_sz);
int damon_set_region_biggest_system_ram_default(struct damon_target *t,
unsigned long *start, unsigned long *end,
unsigned long addr_unit,
unsigned long min_region_sz);
#endif /* CONFIG_DAMON */
#endif /* _DAMON_H */

64
mm/damon/core.c
View File

@ -3408,70 +3408,6 @@ int damon_set_region_system_rams_default(struct damon_target *t,
return damon_set_regions(t, &addr_range, 1, min_region_sz);
}
static int walk_system_ram(struct resource *res, void *arg)
{
struct resource *a = arg;
if (resource_size(a) < resource_size(res)) {
a->start = res->start;
a->end = res->end;
}
return 0;
}
/*
* Find biggest 'System RAM' resource and store its start and end address in
* @start and @end, respectively. If no System RAM is found, returns false.
*/
static bool damon_find_biggest_system_ram(unsigned long *start,
unsigned long *end, unsigned long addr_unit)
{
struct resource res = {};
walk_system_ram_res(0, -1, &res, walk_system_ram);
*start = damon_res_to_core_addr(res.start, addr_unit);
*end = damon_res_to_core_addr(res.end + 1, addr_unit);
if (*end <= *start)
return false;
return true;
}
/**
* damon_set_region_biggest_system_ram_default() - Set the region of the given
* monitoring target as requested, or biggest 'System RAM'.
* @t: The monitoring target to set the region.
* @start: The pointer to the start address of the region.
* @end: The pointer to the end address of the region.
* @addr_unit: The address unit for the damon_ctx of @t.
* @min_region_sz: Minimum region size.
*
* This function sets the region of @t as requested by @start and @end. If the
* values of @start and @end are zero, however, this function finds the biggest
* 'System RAM' resource and sets the region to cover the resource. In the
* latter case, this function saves the start and end addresses of the resource
* in @start and @end, respectively.
*
* Return: 0 on success, negative error code otherwise.
*/
int damon_set_region_biggest_system_ram_default(struct damon_target *t,
unsigned long *start, unsigned long *end,
unsigned long addr_unit, unsigned long min_region_sz)
{
struct damon_addr_range addr_range;
if (*start > *end)
return -EINVAL;
if (!*start && !*end &&
!damon_find_biggest_system_ram(start, end, addr_unit))
return -EINVAL;
addr_range.start = *start;
addr_range.end = *end;
return damon_set_regions(t, &addr_range, 1, min_region_sz);
}
/*
* damon_moving_sum() - Calculate an inferred moving sum value.
* @mvsum: Inferred sum of the last @len_window values.