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Date: Wed, 15 Mar 2017 19:00:01 -0700
From: Joe Perches <joe@...ches.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org
Subject: [PATCH 04/15] mm: page_alloc: fix blank lines
Add and remove a few blank lines.
Signed-off-by: Joe Perches <joe@...ches.com>
---
mm/page_alloc.c | 36 +++++++++++++++++++++++++++---------
1 file changed, 27 insertions(+), 9 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 1029a1dd59d9..ec9832d15d07 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -496,6 +496,7 @@ static int page_is_consistent(struct zone *zone, struct page *page)
return 1;
}
+
/*
* Temporary debugging check for pages not lying within a given zone.
*/
@@ -589,6 +590,7 @@ void prep_compound_page(struct page *page, unsigned int order)
__SetPageHead(page);
for (i = 1; i < nr_pages; i++) {
struct page *p = page + i;
+
set_page_count(p, 0);
p->mapping = TAIL_MAPPING;
set_compound_head(p, page);
@@ -609,6 +611,7 @@ static int __init early_debug_pagealloc(char *buf)
return -EINVAL;
return kstrtobool(buf, &_debug_pagealloc_enabled);
}
+
early_param("debug_pagealloc", early_debug_pagealloc);
static bool need_debug_guardpage(void)
@@ -651,6 +654,7 @@ static int __init debug_guardpage_minorder_setup(char *buf)
pr_info("Setting debug_guardpage_minorder to %lu\n", res);
return 0;
}
+
early_param("debug_guardpage_minorder", debug_guardpage_minorder_setup);
static inline bool set_page_guard(struct zone *zone, struct page *page,
@@ -869,6 +873,7 @@ static inline void __free_one_page(struct page *page,
*/
if ((order < MAX_ORDER - 2) && pfn_valid_within(buddy_pfn)) {
struct page *higher_page, *higher_buddy;
+
combined_pfn = buddy_pfn & pfn;
higher_page = page + (combined_pfn - pfn);
buddy_pfn = __find_buddy_pfn(combined_pfn, order + 1);
@@ -1307,6 +1312,7 @@ static inline bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
{
return true;
}
+
static inline bool __meminit meminit_pfn_in_nid(unsigned long pfn, int node,
struct mminit_pfnnid_cache *state)
{
@@ -1314,7 +1320,6 @@ static inline bool __meminit meminit_pfn_in_nid(unsigned long pfn, int node,
}
#endif
-
void __init __free_pages_bootmem(struct page *page, unsigned long pfn,
unsigned int order)
{
@@ -1708,6 +1713,7 @@ static bool check_pcp_refill(struct page *page)
{
return check_new_page(page);
}
+
static bool check_new_pcp(struct page *page)
{
return false;
@@ -1717,6 +1723,7 @@ static bool check_new_pcp(struct page *page)
static bool check_new_pages(struct page *page, unsigned int order)
{
int i;
+
for (i = 0; i < (1 << order); i++) {
struct page *p = page + i;
@@ -1748,6 +1755,7 @@ static void prep_new_page(struct page *page, unsigned int order, gfp_t gfp_flags
for (i = 0; i < (1 << order); i++) {
struct page *p = page + i;
+
if (poisoned)
poisoned &= page_is_poisoned(p);
}
@@ -1803,7 +1811,6 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order,
return NULL;
}
-
/*
* This array describes the order lists are fallen back to when
* the free lists for the desirable migrate type are depleted
@@ -2266,6 +2273,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
spin_lock_irqsave(&zone->lock, flags);
for (i = 0; i < count; ++i) {
struct page *page = __rmqueue(zone, order, migratetype);
+
if (unlikely(page == NULL))
break;
@@ -2470,6 +2478,7 @@ void drain_all_pages(struct zone *zone)
for_each_cpu(cpu, &cpus_with_pcps) {
struct work_struct *work = per_cpu_ptr(&pcpu_drain, cpu);
+
INIT_WORK(work, drain_local_pages_wq);
queue_work_on(cpu, mm_percpu_wq, work);
}
@@ -2566,6 +2575,7 @@ void free_hot_cold_page(struct page *page, bool cold)
pcp->count++;
if (pcp->count >= pcp->high) {
unsigned long batch = READ_ONCE(pcp->batch);
+
free_pcppages_bulk(zone, batch, pcp);
pcp->count -= batch;
}
@@ -2653,8 +2663,10 @@ int __isolate_free_page(struct page *page, unsigned int order)
*/
if (order >= pageblock_order - 1) {
struct page *endpage = page + (1 << order) - 1;
+
for (; page < endpage; page += pageblock_nr_pages) {
int mt = get_pageblock_migratetype(page);
+
if (!is_migrate_isolate(mt) && !is_migrate_cma(mt)
&& !is_migrate_highatomic(mt))
set_pageblock_migratetype(page,
@@ -2662,7 +2674,6 @@ int __isolate_free_page(struct page *page, unsigned int order)
}
}
-
return 1UL << order;
}
@@ -4260,6 +4271,7 @@ void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask)
{
unsigned int order = get_order(size);
struct page *p = alloc_pages_node(nid, gfp_mask, order);
+
if (!p)
return NULL;
return make_alloc_exact((unsigned long)page_address(p), order, size);
@@ -4306,6 +4318,7 @@ static unsigned long nr_free_zone_pages(int offset)
for_each_zone_zonelist(zone, z, zonelist, offset) {
unsigned long size = zone->managed_pages;
unsigned long high = high_wmark_pages(zone);
+
if (size > high)
sum += size - high;
}
@@ -4721,7 +4734,6 @@ static int build_zonelists_node(pg_data_t *pgdat, struct zonelist *zonelist,
return nr_zones;
}
-
/*
* zonelist_order:
* 0 = automatic detection of better ordering.
@@ -4741,7 +4753,6 @@ static int build_zonelists_node(pg_data_t *pgdat, struct zonelist *zonelist,
static int current_zonelist_order = ZONELIST_ORDER_DEFAULT;
static char zonelist_order_name[3][8] = {"Default", "Node", "Zone"};
-
#ifdef CONFIG_NUMA
/* The value user specified ....changed by config */
static int user_zonelist_order = ZONELIST_ORDER_DEFAULT;
@@ -4785,6 +4796,7 @@ static __init int setup_numa_zonelist_order(char *s)
return ret;
}
+
early_param("numa_zonelist_order", setup_numa_zonelist_order);
/*
@@ -4831,7 +4843,6 @@ int numa_zonelist_order_handler(struct ctl_table *table, int write,
return ret;
}
-
#define MAX_NODE_LOAD (nr_online_nodes)
static int node_load[MAX_NUMNODES];
@@ -4894,7 +4905,6 @@ static int find_next_best_node(int node, nodemask_t *used_node_mask)
return best_node;
}
-
/*
* Build zonelists ordered by node and zones within node.
* This results in maximum locality--normal zone overflows into local
@@ -5340,6 +5350,7 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
static void __meminit zone_init_free_lists(struct zone *zone)
{
unsigned int order, t;
+
for_each_migratetype_order(order, t) {
INIT_LIST_HEAD(&zone->free_area[order].free_list[t]);
zone->free_area[order].nr_free = 0;
@@ -5461,6 +5472,7 @@ static void pageset_set_high(struct per_cpu_pageset *p,
unsigned long high)
{
unsigned long batch = max(1UL, high / 4);
+
if ((high / 4) > (PAGE_SHIFT * 8))
batch = PAGE_SHIFT * 8;
@@ -5489,6 +5501,7 @@ static void __meminit zone_pageset_init(struct zone *zone, int cpu)
static void __meminit setup_zone_pageset(struct zone *zone)
{
int cpu;
+
zone->pageset = alloc_percpu(struct per_cpu_pageset);
for_each_possible_cpu(cpu)
zone_pageset_init(zone, cpu);
@@ -5651,6 +5664,7 @@ void __meminit get_pfn_range_for_nid(unsigned int nid,
static void __init find_usable_zone_for_movable(void)
{
int zone_index;
+
for (zone_index = MAX_NR_ZONES - 1; zone_index >= 0; zone_index--) {
if (zone_index == ZONE_MOVABLE)
continue;
@@ -5927,6 +5941,7 @@ static void __init setup_usemap(struct pglist_data *pgdat,
unsigned long zonesize)
{
unsigned long usemapsize = usemap_size(zone_start_pfn, zonesize);
+
zone->pageblock_flags = NULL;
if (usemapsize)
zone->pageblock_flags =
@@ -6425,6 +6440,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
/* Account for what is only usable for kernelcore */
if (start_pfn < usable_startpfn) {
unsigned long kernel_pages;
+
kernel_pages = min(end_pfn, usable_startpfn)
- start_pfn;
@@ -6501,6 +6517,7 @@ static void check_for_memory(pg_data_t *pgdat, int nid)
for (zone_type = 0; zone_type <= ZONE_MOVABLE - 1; zone_type++) {
struct zone *zone = &pgdat->node_zones[zone_type];
+
if (populated_zone(zone)) {
node_set_state(nid, N_HIGH_MEMORY);
if (N_NORMAL_MEMORY != N_HIGH_MEMORY &&
@@ -6589,6 +6606,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
setup_nr_node_ids();
for_each_online_node(nid) {
pg_data_t *pgdat = NODE_DATA(nid);
+
free_area_init_node(nid, NULL,
find_min_pfn_for_node(nid), NULL);
@@ -6602,6 +6620,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
static int __init cmdline_parse_core(char *p, unsigned long *core)
{
unsigned long long coremem;
+
if (!p)
return -EINVAL;
@@ -6687,7 +6706,6 @@ void free_highmem_page(struct page *page)
}
#endif
-
void __init mem_init_print_info(const char *str)
{
unsigned long physpages, codesize, datasize, rosize, bss_size;
@@ -7052,7 +7070,6 @@ static void setup_min_unmapped_ratio(void)
sysctl_min_unmapped_ratio) / 100;
}
-
int sysctl_min_unmapped_ratio_sysctl_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos)
{
@@ -7637,6 +7654,7 @@ void free_contig_range(unsigned long pfn, unsigned nr_pages)
void __meminit zone_pcp_update(struct zone *zone)
{
unsigned cpu;
+
mutex_lock(&pcp_batch_high_lock);
for_each_possible_cpu(cpu)
pageset_set_high_and_batch(zone,
--
2.10.0.rc2.1.g053435c
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