2 files changed, 32 insertions, 0 deletions

diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h
index 3cd0934d62ba..1ccaab44abcc 100644
--- a/include/linux/genalloc.h
+++ b/include/linux/genalloc.h
@@ -121,6 +121,9 @@ extern struct gen_pool *devm_gen_pool_create(struct device *dev,
                 int min_alloc_order, int nid);
 extern struct gen_pool *dev_get_gen_pool(struct device *dev);
 
+bool addr_in_gen_pool(struct gen_pool *pool, unsigned long start,
+                        size_t size);
+
 #ifdef CONFIG_OF
 extern struct gen_pool *of_get_named_gen_pool(struct device_node *np,
         const char *propname, int index);
diff --git a/lib/genalloc.c b/lib/genalloc.c
index 166f17b9f169..cce4dd68c40d 100644
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -403,6 +403,35 @@ void gen_pool_for_each_chunk(struct gen_pool *pool,
 EXPORT_SYMBOL(gen_pool_for_each_chunk);
 
 /**
+ * addr_in_gen_pool - checks if an address falls within the range of a pool
+ * @pool:       the generic memory pool
+ * @start:      start address
+ * @size:       size of the region
+ *
+ * Check if the range of addresses falls within the specified pool. Returns
+ * true if the entire range is contained in the pool and false otherwise.
+ */
+bool addr_in_gen_pool(struct gen_pool *pool, unsigned long start,
+                        size_t size)
+{
+        bool found = false;
+        unsigned long end = start + size;
+        struct gen_pool_chunk *chunk;
+
+        rcu_read_lock();
+        list_for_each_entry_rcu(chunk, &(pool)->chunks, next_chunk) {
+                if (start >= chunk->start_addr && start <= chunk->end_addr) {
+                        if (end <= chunk->end_addr) {
+                                found = true;
+                                break;
+                        }
+                }
+        }
+        rcu_read_unlock();
+        return found;
+}
+
+/**
  * gen_pool_avail - get available free space of the pool
  * @pool: pool to get available free space
  *