mm/alpha: unify mem_init() for both UMA and NUMA architectures

Now mem_init() for both Alpha UMA and Alpha NUMA are the same, so unify it
to reduce duplicated code.
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/alpha/mm/init.c

@@ -276,17 +276,14 @@ srm_paging_stop (void)
 }
 #endif
 
-#ifndef CONFIG_DISCONTIGMEM
 void __init
 mem_init(void)
 {
-	max_mapnr = max_low_pfn;
-	free_all_bootmem();
+	set_max_mapnr(max_low_pfn);
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
-
+	free_all_bootmem();
 	mem_init_print_info(NULL);
 }
-#endif /* CONFIG_DISCONTIGMEM */
 
 void
 free_initmem(void)

arch/alpha/mm/numa.c

@@ -319,13 +319,3 @@ void __init paging_init(void)
 	/* Initialize the kernel's ZERO_PGE. */
 	memset((void *)ZERO_PGE, 0, PAGE_SIZE);
 }
-
-void __init mem_init(void)
-{
-	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
-	free_all_bootmem();
-	mem_init_print_info(NULL);
-#if 0
-	mem_stress();
-#endif
-}