lib: bitmap: Introduce node-aware alloc API

Expose new node-aware API for bitmap allocation:
bitmap_alloc_node() / bitmap_zalloc_node().

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 37f36dad18bd4e58cd431070dab4aabcf3824f2e..a241dcf50f39f76ea1beb9325758bece9760111f 100644 (file)
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -123,6 +123,8 @@ struct device;
  */
 unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags);
 unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags);
+unsigned long *bitmap_alloc_node(unsigned int nbits, gfp_t flags, int node);
+unsigned long *bitmap_zalloc_node(unsigned int nbits, gfp_t flags, int node);
 void bitmap_free(const unsigned long *bitmap);
 
 /* Managed variants of the above. */

diff --git a/lib/bitmap.c b/lib/bitmap.c
index 663dd81967d4ea20cbe4ad09af36a651a215386d..9264088834566b1a882ac9e1b3992f8e51c93dda 100644 (file)
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -1398,6 +1398,19 @@ unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags)
 }
 EXPORT_SYMBOL(bitmap_zalloc);
 
+unsigned long *bitmap_alloc_node(unsigned int nbits, gfp_t flags, int node)
+{
+       return kmalloc_array_node(BITS_TO_LONGS(nbits), sizeof(unsigned long),
+                                 flags, node);
+}
+EXPORT_SYMBOL(bitmap_alloc_node);
+
+unsigned long *bitmap_zalloc_node(unsigned int nbits, gfp_t flags, int node)
+{
+       return bitmap_alloc_node(nbits, flags | __GFP_ZERO, node);
+}
+EXPORT_SYMBOL(bitmap_zalloc_node);
+
 void bitmap_free(const unsigned long *bitmap)
 {
        kfree(bitmap);