Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[cascardo/linux.git] / lib / genalloc.c

diff --git a/lib/genalloc.c b/lib/genalloc.c
index 166f17b..cce4dd6 100644 (file)
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -402,6 +402,35 @@ 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