Merge tag 'hwmon-for-v7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groec...

[linux.git] / mm / damon / core.c

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 7e4b9affc5b060ea323d44684334e33c81d16ce4..cff932b3317d0897b1db5e3d3b2aa644bd033cc6 100644 (file)
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * Data Access Monitor
- *
- * Author: SeongJae Park <sj@kernel.org>
  */
 
 #define pr_fmt(fmt) "damon: " fmt
@@ -356,8 +354,21 @@ int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
 {
        struct damon_region *r, *next;
        unsigned int i;
+       unsigned long last_end;
        int err;
 
+       for (i = 0; i < nr_ranges; i++) {
+               unsigned long start, end;
+
+               start = ALIGN_DOWN(ranges[i].start, min_region_sz);
+               end = ALIGN(ranges[i].end, min_region_sz);
+               if (start >= end)
+                       return -EINVAL;
+               if (i > 0 && last_end > start)
+                       return -EINVAL;
+               last_end = end;
+       }
+
        /* Remove regions which are not in the new ranges */
        damon_for_each_region_safe(r, next, t) {
                for (i = 0; i < nr_ranges; i++) {