1 files changed, 49 insertions, 0 deletions

diff --git a/lib/genalloc.c b/lib/genalloc.c
index 38d2db82228c..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
  *
@@ -481,6 +510,26 @@ unsigned long gen_pool_first_fit(unsigned long *map, unsigned long size,
 EXPORT_SYMBOL(gen_pool_first_fit);
 
 /**
+ * gen_pool_first_fit_order_align - find the first available region
+ * of memory matching the size requirement. The region will be aligned
+ * to the order of the size specified.
+ * @map: The address to base the search on
+ * @size: The bitmap size in bits
+ * @start: The bitnumber to start searching at
+ * @nr: The number of zeroed bits we're looking for
+ * @data: additional data - unused
+ */
+unsigned long gen_pool_first_fit_order_align(unsigned long *map,
+                unsigned long size, unsigned long start,
+                unsigned int nr, void *data)
+{
+        unsigned long align_mask = roundup_pow_of_two(nr) - 1;
+
+        return bitmap_find_next_zero_area(map, size, start, nr, align_mask);
+}
+EXPORT_SYMBOL(gen_pool_first_fit_order_align);
+
+/**
  * gen_pool_best_fit - find the best fitting region of memory
  * macthing the size requirement (no alignment constraint)
  * @map: The address to base the search on