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percpu: convert chunk hints to be based on pcpu_block_md

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As mentioned in the last patch, a chunk's hints are no different than a
block just responsible for more bits. This converts chunk level hints to
use a pcpu_block_md to maintain them. This lets us reuse the same hint
helper functions as a block. The left_free and right_free are unused by
the chunk's pcpu_block_md.

Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Dennis Zhou
2019-02-26 10:00:08 -08:00
parent 047924c968
commit 92c14cab43
3 changed files with 57 additions and 73 deletions
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5
mm/percpu-internal.h
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@@ -39,9 +39,7 @@ struct pcpu_chunk {
struct list_head list; /* linked to pcpu_slot lists */
int free_bytes; /* free bytes in the chunk */
int contig_bits; /* max contiguous size hint */
int contig_bits_start; /* contig_bits starting
offset */
struct pcpu_block_md chunk_md;
void *base_addr; /* base address of this chunk */
unsigned long *alloc_map; /* allocation map */
@@ -49,7 +47,6 @@ struct pcpu_chunk {
struct pcpu_block_md *md_blocks; /* metadata blocks */
void *data; /* chunk data */
int first_bit; /* no free below this */
bool immutable; /* no [de]population allowed */
int start_offset; /* the overlap with the previous
region to have a page aligned