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lib: bitmap: Introduce node-aware alloc API

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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>
This commit is contained in:
Tariq Toukan 2020-12-30 11:41:52 +02:00 committed by Saeed Mahameed
parent 06338ceff9
commit 7529cc7fbd
2 changed files with 15 additions and 0 deletions
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2
include/linux/bitmap.h
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@ -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. */

13
lib/bitmap.c
View File

@ -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);