mm/page_alloc: use helper macro SZ_1{K,M}

Use helper macro SZ_1K and SZ_1M to do the size conversion.  Minor
readability improvement.

Link: https://lkml.kernel.org/r/20220916072257.9639-13-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0f856b4ce3b0d32c0cf9bdb2123c9e6c6ca3d0dc..3216477d9ba653c65e38db08a4917a25f1e797ad 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7056,7 +7056,7 @@ static int zone_batchsize(struct zone *zone)
         * size is striking a balance between allocation latency
         * and zone lock contention.
         */
-       batch = min(zone_managed_pages(zone) >> 10, (1024 * 1024) / PAGE_SIZE);
+       batch = min(zone_managed_pages(zone) >> 10, SZ_1M / PAGE_SIZE);
        batch /= 4;             /* We effectively *= 4 below */
        if (batch < 1)
                batch = 1;
@@ -8531,8 +8531,8 @@ void __init mem_init_print_info(void)
 #endif
                ")\n",
                K(nr_free_pages()), K(physpages),
-               codesize >> 10, datasize >> 10, rosize >> 10,
-               (init_data_size + init_code_size) >> 10, bss_size >> 10,
+               codesize / SZ_1K, datasize / SZ_1K, rosize / SZ_1K,
+               (init_data_size + init_code_size) / SZ_1K, bss_size / SZ_1K,
                K(physpages - totalram_pages() - totalcma_pages),
                K(totalcma_pages)
 #ifdef CONFIG_HIGHMEM
@@ -9057,8 +9057,8 @@ void *__init alloc_large_system_hash(const char *tablename,
                numentries -= arch_reserved_kernel_pages();
 
                /* It isn't necessary when PAGE_SIZE >= 1MB */
-               if (PAGE_SHIFT < 20)
-                       numentries = round_up(numentries, (1<<20)/PAGE_SIZE);
+               if (PAGE_SIZE < SZ_1M)
+                       numentries = round_up(numentries, SZ_1M / PAGE_SIZE);
 
 #if __BITS_PER_LONG > 32
                if (!high_limit) {