tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 1c9e4561f3b2afffcda007eae9d0ddd25525f50e
commit: 6e162b4c49f7fad5a82d57c8fa4afc4c7103e1f8 [2111/2346] mem-hotplug: let memblock skip the hotpluggable memory regions in __next_mem_range()
config: make ARCH=arm footbridge_defconfig
All warnings:
In file included from include/asm-generic/bug.h:13:0,
from arch/arm/include/asm/bug.h:61,
from include/linux/bug.h:4,
from include/linux/thread_info.h:11,
from include/asm-generic/preempt.h:4,
from arch/arm/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:18,
from include/linux/spinlock.h:50,
from include/linux/mmzone.h:7,
from include/linux/gfp.h:5,
from include/linux/slab.h:14,
from mm/nobootmem.c:13:
mm/nobootmem.c: In function 'free_low_memory_core_early':
>> include/linux/kernel.h:29:20: warning: large integer implicitly truncated to unsigned type [-Woverflow]
#define ULLONG_MAX (~0ULL)
^
>> mm/nobootmem.c:122:28: note: in expansion of macro 'ULLONG_MAX'
memblock_clear_hotplug(0, ULLONG_MAX);
^
vim +/ULLONG_MAX +122 mm/nobootmem.c
7 *
8 * Access to this subsystem has to be serialized externally (which is true
9 * for the boot process anyway).
10 */
11 #include <linux/init.h>
12 #include <linux/pfn.h>
> 13 #include <linux/slab.h>
14 #include <linux/bootmem.h>
15 #include <linux/export.h>
16 #include <linux/kmemleak.h>
17 #include <linux/range.h>
18 #include <linux/memblock.h>
19
20 #include <asm/bug.h>
21 #include <asm/io.h>
22 #include <asm/processor.h>
23
24 #include "internal.h"
25
26 #ifndef CONFIG_NEED_MULTIPLE_NODES
27 struct pglist_data __refdata contig_page_data;
28 EXPORT_SYMBOL(contig_page_data);
29 #endif
30
31 unsigned long max_low_pfn;
32 unsigned long min_low_pfn;
33 unsigned long max_pfn;
34
35 static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
36 u64 goal, u64 limit)
37 {
38 void *ptr;
39 u64 addr;
40
41 if (limit > memblock.current_limit)
42 limit = memblock.current_limit;
43
44 addr = memblock_find_in_range_node(size, align, goal, limit, nid);
45 if (!addr)
46 return NULL;
47
48 if (memblock_reserve(addr, size))
49 return NULL;
50
51 ptr = phys_to_virt(addr);
52 memset(ptr, 0, size);
53 /*
54 * The min_count is set to 0 so that bootmem allocated blocks
55 * are never reported as leaks.
56 */
57 kmemleak_alloc(ptr, size, 0, 0);
58 return ptr;
59 }
60
61 /*
62 * free_bootmem_late - free bootmem pages directly to page allocator
63 * @addr: starting address of the range
64 * @size: size of the range in bytes
65 *
66 * This is only useful when the bootmem allocator has already been torn
67 * down, but we are still initializing the system. Pages are given directly
68 * to the page allocator, no bootmem metadata is updated because it is gone.
69 */
70 void __init free_bootmem_late(unsigned long addr, unsigned long size)
71 {
72 unsigned long cursor, end;
73
74 kmemleak_free_part(__va(addr), size);
75
76 cursor = PFN_UP(addr);
77 end = PFN_DOWN(addr + size);
78
79 for (; cursor < end; cursor++) {
80 __free_pages_bootmem(pfn_to_page(cursor), 0);
81 totalram_pages++;
82 }
83 }
84
85 static void __init __free_pages_memory(unsigned long start, unsigned long end)
86 {
87 int order;
88
89 while (start < end) {
90 order = min(MAX_ORDER - 1UL, __ffs(start));
91
92 while (start + (1UL << order) > end)
93 order--;
94
95 __free_pages_bootmem(pfn_to_page(start), order);
96
97 start += (1UL << order);
98 }
99 }
100
101 static unsigned long __init __free_memory_core(phys_addr_t start,
102 phys_addr_t end)
103 {
104 unsigned long start_pfn = PFN_UP(start);
105 unsigned long end_pfn = min_t(unsigned long,
106 PFN_DOWN(end), max_low_pfn);
107
108 if (start_pfn > end_pfn)
109 return 0;
110
111 __free_pages_memory(start_pfn, end_pfn);
112
113 return end_pfn - start_pfn;
114 }
115
116 static unsigned long __init free_low_memory_core_early(void)
117 {
118 unsigned long count = 0;
119 phys_addr_t start, end;
120 u64 i;
121
> 122 memblock_clear_hotplug(0, ULLONG_MAX);
123
124 for_each_free_mem_range(i, NUMA_NO_NODE, &start, &end, NULL)
125 count += __free_memory_core(start, end);
---
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