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

Since commit b239f7daf553 ("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>

diff --git a/mm/percpu.c b/mm/percpu.c
index a223b3120d33f50d57cccc50c6e80a0a85fced63..acd78da0493b96d229ae065ec0e24dd61f82c8ce 100644 (file)
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -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,