+ lib-genallocc-use-the-vzalloc_node-to-allocate-the-bitmap.patch added to -mm tree

[akpm@xxxxxxxxxxxxxxxxxxxx]

The patch titled
     Subject: lib/genalloc.c: use vzalloc_node() to allocate the bitmap
has been added to the -mm tree.  Its filename is
     lib-genallocc-use-the-vzalloc_node-to-allocate-the-bitmap.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/lib-genallocc-use-the-vzalloc_node-to-allocate-the-bitmap.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/lib-genallocc-use-the-vzalloc_node-to-allocate-the-bitmap.patch

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------------------------------------------------------
From: Huang Shijie <sjhuang@xxxxxxxxxxx>
Subject: lib/genalloc.c: use vzalloc_node() to allocate the bitmap

Some devices may have big memory on chip, such as over 1G.  In some cases,
the nbytes maybe bigger then 4M which is the bounday of the memory buddy
system (4K default).

So use vzalloc_node() to allocate the bitmap.  Also use vfree to free it.

Link: http://lkml.kernel.org/r/20181225015701.6289-1-sjhuang@xxxxxxxxxxx
Signed-off-by: Huang Shijie <sjhuang@xxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Alexey Skidanov <alexey.skidanov@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---


--- a/lib/genalloc.c~lib-genallocc-use-the-vzalloc_node-to-allocate-the-bitmap
+++ a/lib/genalloc.c
@@ -187,7 +187,7 @@ int gen_pool_add_virt(struct gen_pool *p
 	int nbytes = sizeof(struct gen_pool_chunk) +
 				BITS_TO_LONGS(nbits) * sizeof(long);
 
-	chunk = kzalloc_node(nbytes, GFP_KERNEL, nid);
+	chunk = vzalloc_node(nbytes, nid);
 	if (unlikely(chunk == NULL))
 		return -ENOMEM;
 
@@ -251,7 +251,7 @@ void gen_pool_destroy(struct gen_pool *p
 		bit = find_next_bit(chunk->bits, end_bit, 0);
 		BUG_ON(bit < end_bit);
 
-		kfree(chunk);
+		vfree(chunk);
 	}
 	kfree_const(pool->name);
 	kfree(pool);
_

Patches currently in -mm which might be from sjhuang@xxxxxxxxxxx are

mm-change-the-order-of-migrate_reclaimable-migrate_movable-in-fallbacks.patch
lib-genallocc-use-the-vzalloc_node-to-allocate-the-bitmap.patch
lib-genallocc-export-symbol-addr_in_gen_pool.patch