netdev - [net-next 01/14] lib: bitmap: Introduce node-aware alloc API

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Date:   Tue, 26 Oct 2021 19:33:34 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Tariq Toukan <tariqt@...dia.com>,
        Moshe Shemesh <moshe@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 01/14] lib: bitmap: Introduce node-aware alloc API

From: Tariq Toukan <tariqt@...dia.com>

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

Signed-off-by: Tariq Toukan <tariqt@...dia.com>
Reviewed-by: Moshe Shemesh <moshe@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 include/linux/bitmap.h |  2 ++
 lib/bitmap.c           | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 37f36dad18bd..a241dcf50f39 100644
--- 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 663dd81967d4..926408883456 100644
--- 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);
-- 
2.31.1