[PATCHv3 5/5] mm: use 'unsigned int' for page order
From: Kirill A. Shutemov
Date: Wed Aug 19 2015 - 05:22:23 EST
Let's try to be consistent about data type of page order.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
include/linux/mm.h | 5 +++--
mm/hugetlb.c | 19 ++++++++++---------
mm/internal.h | 4 ++--
mm/page_alloc.c | 27 +++++++++++++++------------
4 files changed, 30 insertions(+), 25 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index a4c4b7d07473..a75bbb3f7142 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -557,7 +557,7 @@ static inline compound_page_dtor *get_compound_page_dtor(struct page *page)
return compound_page_dtors[page[1].compound_dtor];
}
-static inline int compound_order(struct page *page)
+static inline unsigned int compound_order(struct page *page)
{
if (!PageHead(page))
return 0;
@@ -1718,7 +1718,8 @@ extern void si_meminfo(struct sysinfo * val);
extern void si_meminfo_node(struct sysinfo *val, int nid);
extern __printf(3, 4)
-void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);
+void warn_alloc_failed(gfp_t gfp_mask, unsigned int order,
+ const char *fmt, ...);
extern void setup_per_cpu_pageset(void);
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 53c0709fd87b..bf64bfebc473 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -817,7 +817,7 @@ static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed)
#if defined(CONFIG_CMA) && defined(CONFIG_X86_64)
static void destroy_compound_gigantic_page(struct page *page,
- unsigned long order)
+ unsigned int order)
{
int i;
int nr_pages = 1 << order;
@@ -832,7 +832,7 @@ static void destroy_compound_gigantic_page(struct page *page,
__ClearPageHead(page);
}
-static void free_gigantic_page(struct page *page, unsigned order)
+static void free_gigantic_page(struct page *page, unsigned int order)
{
free_contig_range(page_to_pfn(page), 1 << order);
}
@@ -876,7 +876,7 @@ static bool zone_spans_last_pfn(const struct zone *zone,
return zone_spans_pfn(zone, last_pfn);
}
-static struct page *alloc_gigantic_page(int nid, unsigned order)
+static struct page *alloc_gigantic_page(int nid, unsigned int order)
{
unsigned long nr_pages = 1 << order;
unsigned long ret, pfn, flags;
@@ -912,7 +912,7 @@ static struct page *alloc_gigantic_page(int nid, unsigned order)
}
static void prep_new_huge_page(struct hstate *h, struct page *page, int nid);
-static void prep_compound_gigantic_page(struct page *page, unsigned long order);
+static void prep_compound_gigantic_page(struct page *page, unsigned int order);
static struct page *alloc_fresh_gigantic_page_node(struct hstate *h, int nid)
{
@@ -945,9 +945,9 @@ static int alloc_fresh_gigantic_page(struct hstate *h,
static inline bool gigantic_page_supported(void) { return true; }
#else
static inline bool gigantic_page_supported(void) { return false; }
-static inline void free_gigantic_page(struct page *page, unsigned order) { }
+static inline void free_gigantic_page(struct page *page, unsigned int order) { }
static inline void destroy_compound_gigantic_page(struct page *page,
- unsigned long order) { }
+ unsigned int order) { }
static inline int alloc_fresh_gigantic_page(struct hstate *h,
nodemask_t *nodes_allowed) { return 0; }
#endif
@@ -1073,7 +1073,7 @@ static void prep_new_huge_page(struct hstate *h, struct page *page, int nid)
put_page(page); /* free it into the hugepage allocator */
}
-static void prep_compound_gigantic_page(struct page *page, unsigned long order)
+static void prep_compound_gigantic_page(struct page *page, unsigned int order)
{
int i;
int nr_pages = 1 << order;
@@ -1640,7 +1640,8 @@ found:
return 1;
}
-static void __init prep_compound_huge_page(struct page *page, int order)
+static void __init prep_compound_huge_page(struct page *page,
+ unsigned int order)
{
if (unlikely(order > (MAX_ORDER - 1)))
prep_compound_gigantic_page(page, order);
@@ -2351,7 +2352,7 @@ static int __init hugetlb_init(void)
module_init(hugetlb_init);
/* Should be called on processing a hugepagesz=... option */
-void __init hugetlb_add_hstate(unsigned order)
+void __init hugetlb_add_hstate(unsigned int order)
{
struct hstate *h;
unsigned long i;
diff --git a/mm/internal.h b/mm/internal.h
index 89e21a07080a..9a9fc497593f 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -157,7 +157,7 @@ __find_buddy_index(unsigned long page_idx, unsigned int order)
extern int __isolate_free_page(struct page *page, unsigned int order);
extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
unsigned int order);
-extern void prep_compound_page(struct page *page, unsigned long order);
+extern void prep_compound_page(struct page *page, unsigned int order);
#ifdef CONFIG_MEMORY_FAILURE
extern bool is_free_buddy_page(struct page *page);
#endif
@@ -214,7 +214,7 @@ int find_suitable_fallback(struct free_area *area, unsigned int order,
* page cannot be allocated or merged in parallel. Alternatively, it must
* handle invalid values gracefully, and use page_order_unsafe() below.
*/
-static inline unsigned long page_order(struct page *page)
+static inline unsigned int page_order(struct page *page)
{
/* PageBuddy() must be checked by the caller */
return page_private(page);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 78859d47aaf4..347724850665 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -163,7 +163,7 @@ bool pm_suspended_storage(void)
#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
-int pageblock_order __read_mostly;
+unsigned int pageblock_order __read_mostly;
#endif
static void __free_pages_ok(struct page *page, unsigned int order);
@@ -441,7 +441,7 @@ static void free_compound_page(struct page *page)
__free_pages_ok(page, compound_order(page));
}
-void prep_compound_page(struct page *page, unsigned long order)
+void prep_compound_page(struct page *page, unsigned int order)
{
int i;
int nr_pages = 1 << order;
@@ -641,7 +641,7 @@ static inline void __free_one_page(struct page *page,
unsigned long combined_idx;
unsigned long uninitialized_var(buddy_idx);
struct page *buddy;
- int max_order = MAX_ORDER;
+ unsigned int max_order = MAX_ORDER;
VM_BUG_ON(!zone_is_initialized(zone));
VM_BUG_ON_PAGE(page->flags & PAGE_FLAGS_CHECK_AT_PREP, page);
@@ -1436,7 +1436,7 @@ int move_freepages(struct zone *zone,
int migratetype)
{
struct page *page;
- unsigned long order;
+ unsigned int order;
int pages_moved = 0;
#ifndef CONFIG_HOLES_IN_ZONE
@@ -1550,7 +1550,7 @@ static bool can_steal_fallback(unsigned int order, int start_mt)
static void steal_suitable_fallback(struct zone *zone, struct page *page,
int start_type)
{
- int current_order = page_order(page);
+ unsigned int current_order = page_order(page);
int pages;
/* Take ownership for orders >= pageblock_order */
@@ -2657,7 +2657,7 @@ static DEFINE_RATELIMIT_STATE(nopage_rs,
DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
-void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
+void warn_alloc_failed(gfp_t gfp_mask, unsigned int order, const char *fmt, ...)
{
unsigned int filter = SHOW_MEM_FILTER_NODES;
@@ -2691,7 +2691,7 @@ void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
va_end(args);
}
- pr_warn("%s: page allocation failure: order:%d, mode:0x%x\n",
+ pr_warn("%s: page allocation failure: order:%u, mode:0x%x\n",
current->comm, order, gfp_mask);
dump_stack();
@@ -3450,7 +3450,8 @@ void free_kmem_pages(unsigned long addr, unsigned int order)
}
}
-static void *make_alloc_exact(unsigned long addr, unsigned order, size_t size)
+static void *make_alloc_exact(unsigned long addr, unsigned int order,
+ size_t size)
{
if (addr) {
unsigned long alloc_end = addr + (PAGE_SIZE << order);
@@ -3502,7 +3503,7 @@ EXPORT_SYMBOL(alloc_pages_exact);
*/
void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask)
{
- unsigned order = get_order(size);
+ unsigned int order = get_order(size);
struct page *p = alloc_pages_node(nid, gfp_mask, order);
if (!p)
return NULL;
@@ -3804,7 +3805,8 @@ void show_free_areas(unsigned int filter)
}
for_each_populated_zone(zone) {
- unsigned long nr[MAX_ORDER], flags, order, total = 0;
+ unsigned int order;
+ unsigned long nr[MAX_ORDER], flags, total = 0;
unsigned char types[MAX_ORDER];
if (skip_free_areas_node(filter, zone_to_nid(zone)))
@@ -4153,7 +4155,7 @@ static void build_zonelists(pg_data_t *pgdat)
nodemask_t used_mask;
int local_node, prev_node;
struct zonelist *zonelist;
- int order = current_zonelist_order;
+ unsigned int order = current_zonelist_order;
/* initialize zonelists */
for (i = 0; i < MAX_ZONELISTS; i++) {
@@ -6818,7 +6820,8 @@ int alloc_contig_range(unsigned long start, unsigned long end,
unsigned migratetype)
{
unsigned long outer_start, outer_end;
- int ret = 0, order;
+ unsigned int order;
+ int ret = 0;
struct compact_control cc = {
.nr_migratepages = 0,
--
2.5.0
--
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