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mm/damon/sysfs: use damon_addr_range for region's start and end values 

DAMON has a struct for each address range but DAMON sysfs interface is
using the low type (unsigned long) for storing the start and end addresses
of regions.  Use the dedicated struct for better type safety.

Link: https://lkml.kernel.org/r/20221026225943.100429-6-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2022-10-26 22:59:36 +00:00 committed by Andrew Morton
parent 898810e5ca
commit 789a230613
1 changed files with 11 additions and 14 deletions
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25
mm/damon/sysfs.c
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@ -1062,13 +1062,11 @@ static struct kobj_type damon_sysfs_schemes_ktype = {
struct damon_sysfs_region {
struct kobject kobj;
unsigned long start;
unsigned long end;
struct damon_addr_range ar;
};
static struct damon_sysfs_region *damon_sysfs_region_alloc(
unsigned long start,
unsigned long end)
struct damon_addr_range ar)
{
struct damon_sysfs_region *region = kmalloc(sizeof(*region),
GFP_KERNEL);
@ -1076,8 +1074,7 @@ static struct damon_sysfs_region *damon_sysfs_region_alloc(
if (!region)
return NULL;
region->kobj = (struct kobject){};
region->start = start;
region->end = end;
region->ar = ar;
return region;
}
@ -1087,7 +1084,7 @@ static ssize_t start_show(struct kobject *kobj, struct kobj_attribute *attr,
struct damon_sysfs_region *region = container_of(kobj,
struct damon_sysfs_region, kobj);
return sysfs_emit(buf, "%lu\n", region->start);
return sysfs_emit(buf, "%lu\n", region->ar.start);
}
static ssize_t start_store(struct kobject *kobj, struct kobj_attribute *attr,
@ -1095,7 +1092,7 @@ static ssize_t start_store(struct kobject *kobj, struct kobj_attribute *attr,
{
struct damon_sysfs_region *region = container_of(kobj,
struct damon_sysfs_region, kobj);
int err = kstrtoul(buf, 0, &region->start);
int err = kstrtoul(buf, 0, &region->ar.start);
return err ? err : count;
}
@ -1106,7 +1103,7 @@ static ssize_t end_show(struct kobject *kobj, struct kobj_attribute *attr,
struct damon_sysfs_region *region = container_of(kobj,
struct damon_sysfs_region, kobj);
return sysfs_emit(buf, "%lu\n", region->end);
return sysfs_emit(buf, "%lu\n", region->ar.end);
}
static ssize_t end_store(struct kobject *kobj, struct kobj_attribute *attr,
@ -1114,7 +1111,7 @@ static ssize_t end_store(struct kobject *kobj, struct kobj_attribute *attr,
{
struct damon_sysfs_region *region = container_of(kobj,
struct damon_sysfs_region, kobj);
int err = kstrtoul(buf, 0, &region->end);
int err = kstrtoul(buf, 0, &region->ar.end);
return err ? err : count;
}
@ -1187,7 +1184,7 @@ static int damon_sysfs_regions_add_dirs(struct damon_sysfs_regions *regions,
regions->regions_arr = regions_arr;
for (i = 0; i < nr_regions; i++) {
region = damon_sysfs_region_alloc(0, 0);
region = damon_sysfs_region_alloc((struct damon_addr_range){});
if (!region) {
damon_sysfs_regions_rm_dirs(regions);
return -ENOMEM;
@ -2147,11 +2144,11 @@ static int damon_sysfs_set_regions(struct damon_target *t,
struct damon_sysfs_region *sys_region =
sysfs_regions->regions_arr[i];
if (sys_region->start > sys_region->end)
if (sys_region->ar.start > sys_region->ar.end)
goto out;
ranges[i].start = sys_region->start;
ranges[i].end = sys_region->end;
ranges[i].start = sys_region->ar.start;
ranges[i].end = sys_region->ar.end;
if (i == 0)
continue;
if (ranges[i - 1].end > ranges[i].start)