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mm/percpu.c: remove the lcm code since block size is fixed at page size 

Since commit b239f7daf5 ("percpu: set PCPU_BITMAP_BLOCK_SIZE to
PAGE_SIZE"), the PCPU_BITMAP_BLOCK_SIZE has been set to page size
fixedly. So the lcm code in pcpu_alloc_first_chunk() doesn't make
sense any more, clean it up.

Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
This commit is contained in:
Baoquan He 2022-10-24 16:14:33 +08:00 committed by Dennis Zhou
parent 83d261fc9e
commit 3289e0533e
1 changed files with 2 additions and 10 deletions
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12
mm/percpu.c
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@ -72,7 +72,6 @@
#include <linux/cpumask.h>
#include <linux/memblock.h>
#include <linux/err.h>
#include <linux/lcm.h>
#include <linux/list.h>
#include <linux/log2.h>
#include <linux/mm.h>
@ -1347,7 +1346,7 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr,
int map_size)
{
struct pcpu_chunk *chunk;
unsigned long aligned_addr, lcm_align;
unsigned long aligned_addr;
int start_offset, offset_bits, region_size, region_bits;
size_t alloc_size;
@ -1355,14 +1354,7 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr,
aligned_addr = tmp_addr & PAGE_MASK;
start_offset = tmp_addr - aligned_addr;
/*
* Align the end of the region with the LCM of PAGE_SIZE and
* PCPU_BITMAP_BLOCK_SIZE. One of these constants is a multiple of
* the other.
*/
lcm_align = lcm(PAGE_SIZE, PCPU_BITMAP_BLOCK_SIZE);
region_size = ALIGN(start_offset + map_size, lcm_align);
region_size = ALIGN(start_offset + map_size, PAGE_SIZE);
/* allocate chunk */
alloc_size = struct_size(chunk, populated,