cregit-Linux how code gets into the kernel

Release 4.7 mm/memblock.c

Directory: mm
/*
 * Procedures for maintaining information about logical memory blocks.
 *
 * Peter Bergner, IBM Corp.     June 2001.
 * Copyright (C) 2001 Peter Bergner.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/poison.h>
#include <linux/pfn.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/memblock.h>

#include <asm-generic/sections.h>
#include <linux/io.h>

#include "internal.h"


static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;

static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP

static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock;
#endif


struct memblock memblock __initdata_memblock = {
	.memory.regions		= memblock_memory_init_regions,
	.memory.cnt		= 1,	/* empty dummy entry */
	.memory.max		= INIT_MEMBLOCK_REGIONS,

	.reserved.regions	= memblock_reserved_init_regions,
	.reserved.cnt		= 1,	/* empty dummy entry */
	.reserved.max		= INIT_MEMBLOCK_REGIONS,

#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	.physmem.regions	= memblock_physmem_init_regions,
	.physmem.cnt		= 1,	/* empty dummy entry */
	.physmem.max		= INIT_PHYSMEM_REGIONS,
#endif

	.bottom_up		= false,
	.current_limit		= MEMBLOCK_ALLOC_ANYWHERE,
};


int memblock_debug __initdata_memblock;
#ifdef CONFIG_MOVABLE_NODE

bool movable_node_enabled __initdata_memblock = false;
#endif

static bool system_has_some_mirror __initdata_memblock = false;

static int memblock_can_resize __initdata_memblock;

static int memblock_memory_in_slab __initdata_memblock = 0;

static int memblock_reserved_in_slab __initdata_memblock = 0;


ulong __init_memblock choose_memblock_flags(void) { return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; }

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tony lucktony luck15100.00%1100.00%
Total15100.00%1100.00%

/* inline so we don't get a warning when pr_debug is compiled out */
static __init_memblock const char * memblock_type_name(struct memblock_type *type) { if (type == &memblock.memory) return "memory"; else if (type == &memblock.reserved) return "reserved"; else return "unknown"; }

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benjamin herrenschmidtbenjamin herrenschmidt4297.67%150.00%
raghavendra d prabhuraghavendra d prabhu12.33%150.00%
Total43100.00%2100.00%

/* adjust *@size so that (@base + *@size) doesn't overflow, return new size */
static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) { return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); }

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tejun heotejun heo31100.00%1100.00%
Total31100.00%1100.00%

/* * Address comparison utilities */
static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, phys_addr_t base2, phys_addr_t size2) { return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); }

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paul mackerraspaul mackerras3786.05%125.00%
benjamin herrenschmidtbenjamin herrenschmidt49.30%125.00%
yinghai luyinghai lu24.65%250.00%
Total43100.00%4100.00%


bool __init_memblock memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size) { unsigned long i; for (i = 0; i < type->cnt; i++) if (memblock_addrs_overlap(base, size, type->regions[i].base, type->regions[i].size)) break; return i < type->cnt; }

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PersonTokensPropCommitsCommitProp
paul mackerraspaul mackerras3752.11%116.67%
benjamin herrenschmidtbenjamin herrenschmidt2332.39%233.33%
alexander kuleshovalexander kuleshov912.68%116.67%
tang chentang chen11.41%116.67%
yinghai luyinghai lu11.41%116.67%
Total71100.00%6100.00%

/* * __memblock_find_range_bottom_up - find free area utility in bottom-up * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @size: size of free area to find * @align: alignment of free area to find * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * @flags: pick from blocks based on memory attributes * * Utility called from memblock_find_in_range_node(), find free area bottom-up. * * RETURNS: * Found address on success, 0 on failure. */
static phys_addr_t __init_memblock __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, phys_addr_t size, phys_addr_t align, int nid, ulong flags) { phys_addr_t this_start, this_end, cand; u64 i; for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { this_start = clamp(this_start, start, end); this_end = clamp(this_end, start, end); cand = round_up(this_start, align); if (cand < this_end && this_end - cand >= size) return cand; } return 0; }

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tang chentang chen9595.00%150.00%
tony lucktony luck55.00%150.00%
Total100100.00%2100.00%

/** * __memblock_find_range_top_down - find free area utility, in top-down * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @size: size of free area to find * @align: alignment of free area to find * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * @flags: pick from blocks based on memory attributes * * Utility called from memblock_find_in_range_node(), find free area top-down. * * RETURNS: * Found address on success, 0 on failure. */
static phys_addr_t __init_memblock __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, phys_addr_t size, phys_addr_t align, int nid, ulong flags) { phys_addr_t this_start, this_end, cand; u64 i; for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, NULL) { this_start = clamp(this_start, start, end); this_end = clamp(this_end, start, end); if (this_end < size) continue; cand = round_down(this_end - size, align); if (cand >= this_start) return cand; } return 0; }

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PersonTokensPropCommitsCommitProp
tang chentang chen9895.15%266.67%
tony lucktony luck54.85%133.33%
Total103100.00%3100.00%

/** * memblock_find_in_range_node - find free area in given range and node * @size: size of free area to find * @align: alignment of free area to find * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * @flags: pick from blocks based on memory attributes * * Find @size free area aligned to @align in the specified range and node. * * When allocation direction is bottom-up, the @start should be greater * than the end of the kernel image. Otherwise, it will be trimmed. The * reason is that we want the bottom-up allocation just near the kernel * image so it is highly likely that the allocated memory and the kernel * will reside in the same node. * * If bottom-up allocation failed, will try to allocate memory top-down. * * RETURNS: * Found address on success, 0 on failure. */
phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, int nid, ulong flags) { phys_addr_t kernel_end, ret; /* pump up @end */ if (end == MEMBLOCK_ALLOC_ACCESSIBLE) end = memblock.current_limit; /* avoid allocating the first page */ start = max_t(phys_addr_t, start, PAGE_SIZE); end = max(start, end); kernel_end = __pa_symbol(_end); /* * try bottom-up allocation only when bottom-up mode * is set and @end is above the kernel image. */ if (memblock_bottom_up() && end > kernel_end) { phys_addr_t bottom_up_start; /* make sure we will allocate above the kernel */ bottom_up_start = max(start, kernel_end); /* ok, try bottom-up allocation first */ ret = __memblock_find_range_bottom_up(bottom_up_start, end, size, align, nid, flags); if (ret) return ret; /* * we always limit bottom-up allocation above the kernel, * but top-down allocation doesn't have the limit, so * retrying top-down allocation may succeed when bottom-up * allocation failed. * * bottom-up allocation is expected to be fail very rarely, * so we use WARN_ONCE() here to see the stack trace if * fail happens. */ WARN_ONCE(1, "memblock: bottom-up allocation failed, memory hotunplug may be affected\n"); } return __memblock_find_range_top_down(start, end, size, align, nid, flags); }

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PersonTokensPropCommitsCommitProp
tang chentang chen13291.67%350.00%
tony lucktony luck74.86%116.67%
grygorii strashkogrygorii strashko42.78%116.67%
joe perchesjoe perches10.69%116.67%
Total144100.00%6100.00%

/** * memblock_find_in_range - find free area in given range * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @size: size of free area to find * @align: alignment of free area to find * * Find @size free area aligned to @align in the specified range. * * RETURNS: * Found address on success, 0 on failure. */
phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, phys_addr_t end, phys_addr_t size, phys_addr_t align) { phys_addr_t ret; ulong flags = choose_memblock_flags(); again: ret = memblock_find_in_range_node(size, align, start, end, NUMA_NO_NODE, flags); if (!ret && (flags & MEMBLOCK_MIRROR)) { pr_warn("Could not allocate %pap bytes of mirrored memory\n", &size); flags &= ~MEMBLOCK_MIRROR; goto again; } return ret; }

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PersonTokensPropCommitsCommitProp
tony lucktony luck4760.26%220.00%
benjamin herrenschmidtbenjamin herrenschmidt1519.23%220.00%
tejun heotejun heo78.97%220.00%
grygorii strashkogrygorii strashko56.41%220.00%
paul mackerraspaul mackerras33.85%110.00%
yinghai luyinghai lu11.28%110.00%
Total78100.00%10100.00%


static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) { type->total_size -= type->regions[r].size; memmove(&type->regions[r], &type->regions[r + 1], (type->cnt - (r + 1)) * sizeof(type->regions[r])); type->cnt--; /* Special case for empty arrays */ if (type->cnt == 0) { WARN_ON(type->total_size != 0); type->cnt = 1; type->regions[0].base = 0; type->regions[0].size = 0; type->regions[0].flags = 0; memblock_set_region_node(&type->regions[0], MAX_NUMNODES); } }

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PersonTokensPropCommitsCommitProp
benjamin herrenschmidtbenjamin herrenschmidt7953.02%233.33%
tejun heotejun heo5838.93%233.33%
tang chentang chen117.38%116.67%
yinghai luyinghai lu10.67%116.67%
Total149100.00%6100.00%

#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
phys_addr_t __init_memblock get_allocated_memblock_reserved_regions_info( phys_addr_t *addr) { if (memblock.reserved.regions == memblock_reserved_init_regions) return 0; *addr = __pa(memblock.reserved.regions); return PAGE_ALIGN(sizeof(struct memblock_region) * memblock.reserved.max); }

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PersonTokensPropCommitsCommitProp
yinghai luyinghai lu51100.00%1100.00%
Total51100.00%1100.00%


phys_addr_t __init_memblock get_allocated_memblock_memory_regions_info( phys_addr_t *addr) { if (memblock.memory.regions == memblock_memory_init_regions) return 0; *addr = __pa(memblock.memory.regions); return PAGE_ALIGN(sizeof(struct memblock_region) * memblock.memory.max); }

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philipp hachtmannphilipp hachtmann51100.00%1100.00%
Total51100.00%1100.00%

#endif /** * memblock_double_array - double the size of the memblock regions array * @type: memblock type of the regions array being doubled * @new_area_start: starting address of memory range to avoid overlap with * @new_area_size: size of memory range to avoid overlap with * * Double the size of the @type regions array. If memblock is being used to * allocate memory for a new reserved regions array and there is a previously * allocated memory range [@new_area_start,@new_area_start+@new_area_size] * waiting to be reserved, ensure the memory used by the new array does * not overlap. * * RETURNS: * 0 on success, -1 on failure. */
static int __init_memblock memblock_double_array(struct memblock_type *type, phys_addr_t new_area_start, phys_addr_t new_area_size) { struct memblock_region *new_array, *old_array; phys_addr_t old_alloc_size, new_alloc_size; phys_addr_t old_size, new_size, addr; int use_slab = slab_is_available(); int *in_slab; /* We don't allow resizing until we know about the reserved regions * of memory that aren't suitable for allocation */ if (!memblock_can_resize) return -1; /* Calculate new doubled size */ old_size = type->max * sizeof(struct memblock_region); new_size = old_size << 1; /* * We need to allocated new one align to PAGE_SIZE, * so we can free them completely later. */ old_alloc_size = PAGE_ALIGN(old_size); new_alloc_size = PAGE_ALIGN(new_size); /* Retrieve the slab flag */ if (type == &memblock.memory) in_slab = &memblock_memory_in_slab; else in_slab = &memblock_reserved_in_slab; /* Try to find some space for it. * * WARNING: We assume that either slab_is_available() and we use it or * we use MEMBLOCK for allocations. That means that this is unsafe to * use when bootmem is currently active (unless bootmem itself is * implemented on top of MEMBLOCK which isn't the case yet) * * This should however not be an issue for now, as we currently only * call into MEMBLOCK while it's still active, or much later when slab * is active for memory hotplug operations */ if (use_slab) { new_array = kmalloc(new_size, GFP_KERNEL); addr = new_array ? __pa(new_array) : 0; } else { /* only exclude range when trying to double reserved.regions */ if (type != &memblock.reserved) new_area_start = new_area_size = 0; addr = memblock_find_in_range(new_area_start + new_area_size, memblock.current_limit, new_alloc_size, PAGE_SIZE); if (!addr && new_area_size) addr = memblock_find_in_range(0, min(new_area_start, memblock.current_limit), new_alloc_size, PAGE_SIZE); new_array = addr ? __va(addr) : NULL; } if (!addr) { pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", memblock_type_name(type), type->max, type->max * 2); return -1; } memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", memblock_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size - 1); /* * Found space, we now need to move the array over before we add the * reserved region since it may be our reserved array itself that is * full. */ memcpy(new_array, type->regions, old_size); memset(new_array + type->max, 0, old_size); old_array = type->regions; type->regions = new_array; type->max <<= 1; /* Free old array. We needn't free it if the array is the static one */ if (*in_slab) kfree(old_array); else if (old_array != memblock_memory_init_regions && old_array != memblock_reserved_init_regions) memblock_free(__pa(old_array), old_alloc_size); /* * Reserve the new array if that comes from the memblock. Otherwise, we * needn't do it */ if (!use_slab) BUG_ON(memblock_reserve(addr, new_alloc_size)); /* Update slab flag */ *in_slab = use_slab; return 0; }

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benjamin herrenschmidtbenjamin herrenschmidt19251.20%19.09%
gavin shangavin shan6216.53%218.18%
yinghai luyinghai lu5614.93%327.27%
greg pearsongreg pearson5213.87%19.09%
tejun heotejun heo71.87%218.18%
andrew mortonandrew morton51.33%19.09%
sachin kamatsachin kamat10.27%19.09%
Total375100.00%11100.00%

/** * memblock_merge_regions - merge neighboring compatible regions * @type: memblock type to scan * * Scan @type and merge neighboring compatible regions. */
static void __init_memblock memblock_merge_regions(struct memblock_type *type) { int i = 0; /* cnt never goes below 1 */ while (i < type->cnt - 1) { struct memblock_region *this = &type->regions[i]; struct memblock_region *next = &type->regions[i + 1]; if (this->base + this->size != next->base || memblock_get_region_node(this) != memblock_get_region_node(next) || this->flags != next->flags) { BUG_ON(this->base + this->size > next->base); i++; continue; } this->size += next->size; /* move forward from next + 1, index of which is i + 2 */ memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); type->cnt--; } }

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PersonTokensPropCommitsCommitProp
tejun heotejun heo8354.61%218.18%
benjamin herrenschmidtbenjamin herrenschmidt3523.03%327.27%
paul mackerraspaul mackerras2013.16%19.09%
tang chentang chen85.26%19.09%
david gibsondavid gibson21.32%19.09%
lin fenglin feng21.32%19.09%
manish ahujamanish ahuja10.66%19.09%
yinghai luyinghai lu10.66%19.09%
Total152100.00%11100.00%

/** * memblock_insert_region - insert new memblock region * @type: memblock type to insert into * @idx: index for the insertion point * @base: base address of the new region * @size: size of the new region * @nid: node id of the new region * @flags: flags of the new region * * Insert new memblock region [@base,@base+@size) into @type at @idx. * @type must already have extra room to accomodate the new region. */
static void __init_memblock memblock_insert_region(struct memblock_type *type, int idx, phys_addr_t base, phys_addr_t size, int nid, unsigned long flags) { struct memblock_region *rgn = &type->regions[idx]; BUG_ON(type->cnt >= type->max); memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); rgn->base = base; rgn->size = size; rgn->flags = flags; memblock_set_region_node(rgn, nid); type->cnt++; type->total_size += size; }

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tejun heotejun heo8980.18%342.86%
tang chentang chen109.01%114.29%
benjamin herrenschmidtbenjamin herrenschmidt76.31%228.57%
paul mackerraspaul mackerras54.50%114.29%
Total111100.00%7100.00%

/** * memblock_add_range - add new memblock region * @type: memblock type to add new region into * @base: base address of the new region * @size: size of the new region * @nid: nid of the new region * @flags: flags of the new region * * Add new memblock region [@base,@base+@size) into @type. The new region * is allowed to overlap with existing ones - overlaps don't affect already * existing regions. @type is guaranteed to be minimal (all neighbouring * compatible regions are merged) after the addition. * * RETURNS: * 0 on success, -errno on failure. */
int __init_memblock memblock_add_range(struct memblock_type *type, phys_addr_t base, phys_addr_t size, int nid, unsigned long flags) { bool insert = false; phys_addr_t obase = base; phys_addr_t end = base + memblock_cap_size(base, &size); int idx, nr_new; struct memblock_region *rgn; if (!size) return 0; /* special case for empty array */ if (type->regions[0].size == 0) { WARN_ON(type->cnt != 1 || type->total_size); type->regions[0].base = base; type->regions[0].size = size; type->regions[0].flags = flags; memblock_set_region_node(&type->regions[0], nid); type->total_size = size; return 0; } repeat: /* * The following is executed twice. Once with %false @insert and * then with %true. The first counts the number of regions needed * to accomodate the new area. The second actually inserts them. */ base = obase; nr_new = 0; for_each_memblock_type(type, rgn) { phys_addr_t rbase = rgn->base; phys_addr_t rend = rbase + rgn->size; if (rbase >= end) break; if (rend <= base) continue; /* * @rgn overlaps. If it separates the lower part of new * area, insert that portion. */ if (rbase > base) { #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP WARN_ON(nid != memblock_get_region_node(rgn)); #endif WARN_ON(flags != rgn->flags); nr_new++; if (insert) memblock_insert_region(type, idx++, base, rbase - base, nid, flags); } /* area below @rend is dealt with, forget about it */ base = min(rend, end); } /* insert the remaining portion */ if (base < end) { nr_new++; if (insert) memblock_insert_region(type, idx, base, end - base, nid, flags); } /* * If this was the first round, resize array and repeat for actual * insertions; otherwise, merge and return. */ if (!insert) { while (type->cnt + nr_new > type->max) if (memblock_double_array(type, obase, size) < 0) return -ENOMEM; insert = true; goto repeat; } else { memblock_merge_regions(type); return 0; } }

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PersonTokensPropCommitsCommitProp
tejun heotejun heo20658.19%736.84%
benjamin herrenschmidtbenjamin herrenschmidt6016.95%421.05%
wei yangwei yang246.78%210.53%
tang chentang chen195.37%15.26%
paul mackerraspaul mackerras174.80%15.26%
alexander kuleshovalexander kuleshov143.95%15.26%
kumar galakumar gala92.54%15.26%
greg pearsongreg pearson41.13%15.26%
philipp hachtmannphilipp hachtmann10.28%15.26%
Total354100.00%19100.00%


int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, int nid) { return memblock_add_range(&memblock.memory, base, size, nid, 0); }

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tejun heotejun heo2990.62%133.33%
tang chentang chen26.25%133.33%
philipp hachtmannphilipp hachtmann13.12%133.33%
Total32100.00%3100.00%


int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) { memblock_dbg("memblock_add: [%#016llx-%#016llx] flags %#02lx %pF\n", (unsigned long long)base, (unsigned long long)base + size - 1, 0UL, (void *)_RET_IP_); return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); }

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PersonTokensPropCommitsCommitProp
alexander kuleshovalexander kuleshov4371.67%333.33%
paul mackerraspaul mackerras1016.67%111.11%
tejun heotejun heo23.33%222.22%
tang chentang chen23.33%111.11%
benjamin herrenschmidtbenjamin herrenschmidt23.33%111.11%
yinghai luyinghai lu11.67%111.11%
Total60100.00%9100.00%

/** * memblock_isolate_range - isolate given range into disjoint memblocks * @type: memblock type to isolate range for * @base: base of range to isolate * @size: size of range to isolate * @start_rgn: out parameter for the start of isolated region * @end_rgn: out parameter for the end of isolated region * * Walk @type and ensure that regions don't cross the boundaries defined by * [@base,@base+@size). Crossing regions are split at the boundaries, * which may create at most two more regions. The index of the first * region inside the range is returned in *@start_rgn and end in *@end_rgn. * * RETURNS: * 0 on success, -errno on failure. */
static int __init_memblock memblock_isolate_range(struct memblock_type *type, phys_addr_t base, phys_addr_t size, int *start_rgn, int *end_rgn) { phys_addr_t end = base + memblock_cap_size(base, &size); int idx; struct memblock_region *rgn; *start_rgn = *end_rgn = 0; if (!size) return 0; /* we'll create at most two more regions */ while (type->cnt + 2 > type->max) if (memblock_double_array(type, base, size) < 0) return -ENOMEM; for_each_memblock_type(type, rgn) { phys_addr_t rbase = rgn->base; phys_addr_t rend = rbase + rgn->size; if (rbase >= end) break; if (rend <= base) continue; if (rbase < base) { /* * @rgn intersects from below. Split and continue * to process the next region - the new top half. */ rgn->base = base; rgn->size -= base - rbase; type->total_size -= base - rbase; memblock_insert_region(type, idx, rbase, base - rbase, memblock_get_region_node(rgn), rgn->flags); } else if (rend > end) { /* * @rgn intersects from above. Split and redo the * current region - the new bottom half. */ rgn->base = end; rgn->size -= end - rbase; type->total_size -= end - rbase; memblock_insert_region(type, idx--, rbase, end - rbase, memblock_get_region_node(rgn), rgn->flags); } else { /* @rgn is fully contained, record it */ if (!*end_rgn) *start_rgn = idx; *end_rgn = idx + 1; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
tejun heotejun heo23689.39%562.50%
alexander kuleshovalexander kuleshov166.06%112.50%
tang chentang chen83.03%112.50%
greg pearsongreg pearson41.52%112.50%
Total264100.00%8100.00%


static int __init_memblock memblock_remove_range(struct memblock_type *type, phys_addr_t base, phys_addr_t size) { int start_rgn, end_rgn; int i, ret; ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; for (i = end_rgn - 1; i >= start_rgn; i--) memblock_remove_region(type, i); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
tejun heotejun heo4355.84%327.27%
badari pulavartybadari pulavarty1418.18%19.09%
benjamin herrenschmidtbenjamin herrenschmidt1418.18%327.27%
michael ellermanmichael ellerman33.90%19.09%
yinghai luyinghai lu11.30%19.09%
alexander kuleshovalexander kuleshov11.30%19.09%
philipp hachtmannphilipp hachtmann11.30%19.09%
Total77100.00%11100.00%


int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) { return memblock_remove_range(&memblock.memory, base, size); }

Contributors

PersonTokensPropCommitsCommitProp
tejun heotejun heo2496.00%266.67%
philipp hachtmannphilipp hachtmann14.00%133.33%
Total25100.00%3100.00%


int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) { memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", (unsigned long long)base, (unsigned long long)base + size - 1, (void *)_RET_IP_); kmemleak_free_part(__va(base), size); return memblock_remove_range(&memblock.reserved, base, size); }

Contributors

PersonTokensPropCommitsCommitProp
tejun heotejun heo4164.06%342.86%
catalin marinascatalin marinas1015.62%114.29%
h. peter anvinh. peter anvin1015.62%114.29%
grygorii strashkogrygorii strashko23.12%114.29%
philipp hachtmannphilipp hachtmann11.56%114.29%
Total64100.00%7100.00%


int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) { memblock_dbg("memblock_reserve: [%#016llx-%#016llx] flags %#02lx %pF\n", (unsigned long long)base, (unsigned long long)base + size - 1, 0UL, (void *)_RET_IP_); return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); }

Contributors

PersonTokensPropCommitsCommitProp
tejun heotejun heo3761.67%440.00%
h. peter anvinh. peter anvin1016.67%110.00%
alexander kuleshovalexander kuleshov610.00%220.00%
tang chentang chen46.67%110.00%
grygorii strashkogrygorii strashko23.33%110.00%
philipp hachtmannphilipp hachtmann11.67%110.00%
Total60100.00%10100.00%

/** * * This function isolates region [@base, @base + @size), and sets/clears flag * * Return 0 on success, -errno on failure. */
static int __init_memblock memblock_setclr_flag(phys_addr_t base, phys_addr_t size, int set, int flag) { struct memblock_type *type = &memblock.memory; int i, ret, start_rgn, end_rgn; ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; for (i = start_rgn; i < end_rgn; i++) if (set) memblock_set_region_flags(&type->regions[i], flag); else memblock_clear_region_flags(&type->regions[i], flag); memblock_merge_regions(type); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
tang chentang chen8776.32%150.00%
tony lucktony luck2723.68%150.00%
Total114100.00%2100.00%

/** * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. * @base: the base phys addr of the region * @size: the size of the region * * Return 0 on success, -errno on failure. */
int __init_memblock memblock_mark_hotplug(