Commit 061f67bc authored Feb 12, 2015 by Rasmus Villemoes Committed by Linus Torvalds Feb 12, 2015

mm/page_alloc.c: pull out init code from build_all_zonelists



Pulling the code protected by if (system_state == SYSTEM_BOOTING) into
its own helper allows us to shrink .text a little. This relies on
build_all_zonelists already having a __ref annotation. Add a comment
explaining why so one doesn't have to track it down through git log.

The real saving comes in 3/5, ("mm/mm_init.c: Mark mminit_verify_zonelist
as __init"), where we save about 400 bytes

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Vishnu Pratap Singh <vishnu.ps@samsung.com>
Cc: Pintu Kumar <pintu.k@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent fc5199d1

mm/page_alloc.c

+14 −3

Original line number	Diff line number	Diff line
		@@ -3871,18 +3871,29 @@ static int __build_all_zonelists(void *data)
		return 0;
		}

		static noinline void __init
		build_all_zonelists_init(void)
		{
		__build_all_zonelists(NULL);
		mminit_verify_zonelist();
		cpuset_init_current_mems_allowed();
		}

		/*
		* Called with zonelists_mutex held always
		* unless system_state == SYSTEM_BOOTING.
		*
		* __ref due to (1) call of __meminit annotated setup_zone_pageset
		* [we're only called with non-NULL zone through __meminit paths] and
		* (2) call of __init annotated helper build_all_zonelists_init
		* [protected by SYSTEM_BOOTING].
		*/
		void __ref build_all_zonelists(pg_data_t pgdat, struct zone zone)
		{
		set_zonelist_order();

		if (system_state == SYSTEM_BOOTING) {
		__build_all_zonelists(NULL);
		mminit_verify_zonelist();
		cpuset_init_current_mems_allowed();
		build_all_zonelists_init();
		} else {
		#ifdef CONFIG_MEMORY_HOTPLUG
		if (zone)