Contributors: 57
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Kamezawa Hiroyuki |
930 |
29.75% |
12 |
9.76% |
| Omar Sandoval |
747 |
23.90% |
8 |
6.50% |
| Linus Torvalds (pre-git) |
584 |
18.68% |
33 |
26.83% |
| Lorenzo Stoakes |
183 |
5.85% |
3 |
2.44% |
| Andrew Morton |
157 |
5.02% |
5 |
4.07% |
| David Hildenbrand |
129 |
4.13% |
3 |
2.44% |
| Kairui Song |
61 |
1.95% |
1 |
0.81% |
| Alexey Dobriyan |
31 |
0.99% |
3 |
2.44% |
| Laura Abbott |
30 |
0.96% |
1 |
0.81% |
| Magnus Damm |
24 |
0.77% |
1 |
0.81% |
| Pratyush Anand |
23 |
0.74% |
1 |
0.81% |
| Paul Mundt |
22 |
0.70% |
2 |
1.63% |
| Jakob Koschel |
20 |
0.64% |
1 |
0.81% |
| David Howells |
18 |
0.58% |
3 |
2.44% |
| James Morse |
15 |
0.48% |
1 |
0.81% |
| Linus Torvalds |
12 |
0.38% |
2 |
1.63% |
| Baoquan He |
12 |
0.38% |
1 |
0.81% |
| jia zhang |
12 |
0.38% |
1 |
0.81% |
| Edgar E. Iglesias |
10 |
0.32% |
1 |
0.81% |
| Matthew Garrett |
10 |
0.32% |
2 |
1.63% |
| Zhao Hongjiang |
6 |
0.19% |
1 |
0.81% |
| Vitaly Kuznetsov |
6 |
0.19% |
1 |
0.81% |
| Heiko Carstens |
6 |
0.19% |
1 |
0.81% |
| Olaf Hering |
5 |
0.16% |
1 |
0.81% |
| Adrian Hunter |
5 |
0.16% |
1 |
0.81% |
| Matthew Wilcox |
5 |
0.16% |
1 |
0.81% |
| Linus Walleij |
4 |
0.13% |
1 |
0.81% |
| Christoph Lameter |
4 |
0.13% |
1 |
0.81% |
| Liu Shixin |
4 |
0.13% |
2 |
1.63% |
| Thomas Gleixner |
3 |
0.10% |
1 |
0.81% |
| Andi Kleen |
3 |
0.10% |
1 |
0.81% |
| Dan Aloni |
3 |
0.10% |
1 |
0.81% |
| Frédéric Weisbecker |
3 |
0.10% |
1 |
0.81% |
| Hari Bathini |
3 |
0.10% |
1 |
0.81% |
| Ard Biesheuvel |
3 |
0.10% |
1 |
0.81% |
| Randy Dunlap |
3 |
0.10% |
1 |
0.81% |
| Ingo Molnar |
3 |
0.10% |
1 |
0.81% |
| Tony Luck |
2 |
0.06% |
1 |
0.81% |
| Fengguang Wu |
2 |
0.06% |
1 |
0.81% |
| Al Viro |
2 |
0.06% |
1 |
0.81% |
| Yinghai Lu |
2 |
0.06% |
1 |
0.81% |
| Yasunori Goto |
2 |
0.06% |
1 |
0.81% |
| Djalal Harouni |
2 |
0.06% |
1 |
0.81% |
| Vivek Goyal |
2 |
0.06% |
1 |
0.81% |
| Prasanna Meda |
1 |
0.03% |
1 |
0.81% |
| Dave Anderson |
1 |
0.03% |
1 |
0.81% |
| Lai Jiangshan |
1 |
0.03% |
1 |
0.81% |
| Paul Gortmaker |
1 |
0.03% |
1 |
0.81% |
| Yue haibing |
1 |
0.03% |
1 |
0.81% |
| Xishi Qiu |
1 |
0.03% |
1 |
0.81% |
| Ernie Petrides |
1 |
0.03% |
1 |
0.81% |
| Fabian Frederick |
1 |
0.03% |
1 |
0.81% |
| Azeem Shaikh |
1 |
0.03% |
1 |
0.81% |
| Panagiotis Issaris |
1 |
0.03% |
1 |
0.81% |
| Dave Hansen |
1 |
0.03% |
1 |
0.81% |
| Greg Kroah-Hartman |
1 |
0.03% |
1 |
0.81% |
| Mike Rapoport |
1 |
0.03% |
1 |
0.81% |
| Total |
3126 |
|
123 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* fs/proc/kcore.c kernel ELF core dumper
*
* Modelled on fs/exec.c:aout_core_dump()
* Jeremy Fitzhardinge <jeremy@sw.oz.au>
* ELF version written by David Howells <David.Howells@nexor.co.uk>
* Modified and incorporated into 2.3.x by Tigran Aivazian <tigran@veritas.com>
* Support to dump vmalloc'd areas (ELF only), Tigran Aivazian <tigran@veritas.com>
* Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <kanoj@sgi.com>
*/
#include <linux/crash_core.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/kcore.h>
#include <linux/user.h>
#include <linux/capability.h>
#include <linux/elf.h>
#include <linux/elfcore.h>
#include <linux/vmalloc.h>
#include <linux/highmem.h>
#include <linux/printk.h>
#include <linux/memblock.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <asm/io.h>
#include <linux/list.h>
#include <linux/ioport.h>
#include <linux/memory.h>
#include <linux/sched/task.h>
#include <linux/security.h>
#include <asm/sections.h>
#include "internal.h"
#define CORE_STR "CORE"
#ifndef ELF_CORE_EFLAGS
#define ELF_CORE_EFLAGS 0
#endif
static struct proc_dir_entry *proc_root_kcore;
#ifndef kc_vaddr_to_offset
#define kc_vaddr_to_offset(v) ((v) - PAGE_OFFSET)
#endif
#ifndef kc_offset_to_vaddr
#define kc_offset_to_vaddr(o) ((o) + PAGE_OFFSET)
#endif
static LIST_HEAD(kclist_head);
static DECLARE_RWSEM(kclist_lock);
static int kcore_need_update = 1;
/*
* Returns > 0 for RAM pages, 0 for non-RAM pages, < 0 on error
* Same as oldmem_pfn_is_ram in vmcore
*/
static int (*mem_pfn_is_ram)(unsigned long pfn);
int __init register_mem_pfn_is_ram(int (*fn)(unsigned long pfn))
{
if (mem_pfn_is_ram)
return -EBUSY;
mem_pfn_is_ram = fn;
return 0;
}
static int pfn_is_ram(unsigned long pfn)
{
if (mem_pfn_is_ram)
return mem_pfn_is_ram(pfn);
else
return 1;
}
/* This doesn't grab kclist_lock, so it should only be used at init time. */
void __init kclist_add(struct kcore_list *new, void *addr, size_t size,
int type)
{
new->addr = (unsigned long)addr;
new->size = size;
new->type = type;
list_add_tail(&new->list, &kclist_head);
}
static size_t get_kcore_size(int *nphdr, size_t *phdrs_len, size_t *notes_len,
size_t *data_offset)
{
size_t try, size;
struct kcore_list *m;
*nphdr = 1; /* PT_NOTE */
size = 0;
list_for_each_entry(m, &kclist_head, list) {
try = kc_vaddr_to_offset((size_t)m->addr + m->size);
if (try > size)
size = try;
*nphdr = *nphdr + 1;
}
*phdrs_len = *nphdr * sizeof(struct elf_phdr);
*notes_len = (4 * sizeof(struct elf_note) +
3 * ALIGN(sizeof(CORE_STR), 4) +
VMCOREINFO_NOTE_NAME_BYTES +
ALIGN(sizeof(struct elf_prstatus), 4) +
ALIGN(sizeof(struct elf_prpsinfo), 4) +
ALIGN(arch_task_struct_size, 4) +
ALIGN(vmcoreinfo_size, 4));
*data_offset = PAGE_ALIGN(sizeof(struct elfhdr) + *phdrs_len +
*notes_len);
return *data_offset + size;
}
#ifdef CONFIG_HIGHMEM
/*
* If no highmem, we can assume [0...max_low_pfn) continuous range of memory
* because memory hole is not as big as !HIGHMEM case.
* (HIGHMEM is special because part of memory is _invisible_ from the kernel.)
*/
static int kcore_ram_list(struct list_head *head)
{
struct kcore_list *ent;
ent = kmalloc(sizeof(*ent), GFP_KERNEL);
if (!ent)
return -ENOMEM;
ent->addr = (unsigned long)__va(0);
ent->size = max_low_pfn << PAGE_SHIFT;
ent->type = KCORE_RAM;
list_add(&ent->list, head);
return 0;
}
#else /* !CONFIG_HIGHMEM */
#ifdef CONFIG_SPARSEMEM_VMEMMAP
/* calculate vmemmap's address from given system ram pfn and register it */
static int
get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
{
unsigned long pfn = __pa(ent->addr) >> PAGE_SHIFT;
unsigned long nr_pages = ent->size >> PAGE_SHIFT;
unsigned long start, end;
struct kcore_list *vmm, *tmp;
start = ((unsigned long)pfn_to_page(pfn)) & PAGE_MASK;
end = ((unsigned long)pfn_to_page(pfn + nr_pages)) - 1;
end = PAGE_ALIGN(end);
/* overlap check (because we have to align page */
list_for_each_entry(tmp, head, list) {
if (tmp->type != KCORE_VMEMMAP)
continue;
if (start < tmp->addr + tmp->size)
if (end > tmp->addr)
end = tmp->addr;
}
if (start < end) {
vmm = kmalloc(sizeof(*vmm), GFP_KERNEL);
if (!vmm)
return 0;
vmm->addr = start;
vmm->size = end - start;
vmm->type = KCORE_VMEMMAP;
list_add_tail(&vmm->list, head);
}
return 1;
}
#else
static int
get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
{
return 1;
}
#endif
static int
kclist_add_private(unsigned long pfn, unsigned long nr_pages, void *arg)
{
struct list_head *head = (struct list_head *)arg;
struct kcore_list *ent;
struct page *p;
if (!pfn_valid(pfn))
return 1;
p = pfn_to_page(pfn);
ent = kmalloc(sizeof(*ent), GFP_KERNEL);
if (!ent)
return -ENOMEM;
ent->addr = (unsigned long)page_to_virt(p);
ent->size = nr_pages << PAGE_SHIFT;
if (!virt_addr_valid((void *)ent->addr))
goto free_out;
/* cut not-mapped area. ....from ppc-32 code. */
if (ULONG_MAX - ent->addr < ent->size)
ent->size = ULONG_MAX - ent->addr;
/*
* We've already checked virt_addr_valid so we know this address
* is a valid pointer, therefore we can check against it to determine
* if we need to trim
*/
if (VMALLOC_START > ent->addr) {
if (VMALLOC_START - ent->addr < ent->size)
ent->size = VMALLOC_START - ent->addr;
}
ent->type = KCORE_RAM;
list_add_tail(&ent->list, head);
if (!get_sparsemem_vmemmap_info(ent, head)) {
list_del(&ent->list);
goto free_out;
}
return 0;
free_out:
kfree(ent);
return 1;
}
static int kcore_ram_list(struct list_head *list)
{
int nid, ret;
unsigned long end_pfn;
/* Not inialized....update now */
/* find out "max pfn" */
end_pfn = 0;
for_each_node_state(nid, N_MEMORY) {
unsigned long node_end;
node_end = node_end_pfn(nid);
if (end_pfn < node_end)
end_pfn = node_end;
}
/* scan 0 to max_pfn */
ret = walk_system_ram_range(0, end_pfn, list, kclist_add_private);
if (ret)
return -ENOMEM;
return 0;
}
#endif /* CONFIG_HIGHMEM */
static int kcore_update_ram(void)
{
LIST_HEAD(list);
LIST_HEAD(garbage);
int nphdr;
size_t phdrs_len, notes_len, data_offset;
struct kcore_list *tmp, *pos;
int ret = 0;
down_write(&kclist_lock);
if (!xchg(&kcore_need_update, 0))
goto out;
ret = kcore_ram_list(&list);
if (ret) {
/* Couldn't get the RAM list, try again next time. */
WRITE_ONCE(kcore_need_update, 1);
list_splice_tail(&list, &garbage);
goto out;
}
list_for_each_entry_safe(pos, tmp, &kclist_head, list) {
if (pos->type == KCORE_RAM || pos->type == KCORE_VMEMMAP)
list_move(&pos->list, &garbage);
}
list_splice_tail(&list, &kclist_head);
proc_root_kcore->size = get_kcore_size(&nphdr, &phdrs_len, ¬es_len,
&data_offset);
out:
up_write(&kclist_lock);
list_for_each_entry_safe(pos, tmp, &garbage, list) {
list_del(&pos->list);
kfree(pos);
}
return ret;
}
static void append_kcore_note(char *notes, size_t *i, const char *name,
unsigned int type, const void *desc,
size_t descsz)
{
struct elf_note *note = (struct elf_note *)¬es[*i];
note->n_namesz = strlen(name) + 1;
note->n_descsz = descsz;
note->n_type = type;
*i += sizeof(*note);
memcpy(¬es[*i], name, note->n_namesz);
*i = ALIGN(*i + note->n_namesz, 4);
memcpy(¬es[*i], desc, descsz);
*i = ALIGN(*i + descsz, 4);
}
static ssize_t read_kcore_iter(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
char *buf = file->private_data;
loff_t *fpos = &iocb->ki_pos;
size_t phdrs_offset, notes_offset, data_offset;
size_t page_offline_frozen = 1;
size_t phdrs_len, notes_len;
struct kcore_list *m;
size_t tsz;
int nphdr;
unsigned long start;
size_t buflen = iov_iter_count(iter);
size_t orig_buflen = buflen;
int ret = 0;
down_read(&kclist_lock);
/*
* Don't race against drivers that set PageOffline() and expect no
* further page access.
*/
page_offline_freeze();
get_kcore_size(&nphdr, &phdrs_len, ¬es_len, &data_offset);
phdrs_offset = sizeof(struct elfhdr);
notes_offset = phdrs_offset + phdrs_len;
/* ELF file header. */
if (buflen && *fpos < sizeof(struct elfhdr)) {
struct elfhdr ehdr = {
.e_ident = {
[EI_MAG0] = ELFMAG0,
[EI_MAG1] = ELFMAG1,
[EI_MAG2] = ELFMAG2,
[EI_MAG3] = ELFMAG3,
[EI_CLASS] = ELF_CLASS,
[EI_DATA] = ELF_DATA,
[EI_VERSION] = EV_CURRENT,
[EI_OSABI] = ELF_OSABI,
},
.e_type = ET_CORE,
.e_machine = ELF_ARCH,
.e_version = EV_CURRENT,
.e_phoff = sizeof(struct elfhdr),
.e_flags = ELF_CORE_EFLAGS,
.e_ehsize = sizeof(struct elfhdr),
.e_phentsize = sizeof(struct elf_phdr),
.e_phnum = nphdr,
};
tsz = min_t(size_t, buflen, sizeof(struct elfhdr) - *fpos);
if (copy_to_iter((char *)&ehdr + *fpos, tsz, iter) != tsz) {
ret = -EFAULT;
goto out;
}
buflen -= tsz;
*fpos += tsz;
}
/* ELF program headers. */
if (buflen && *fpos < phdrs_offset + phdrs_len) {
struct elf_phdr *phdrs, *phdr;
phdrs = kzalloc(phdrs_len, GFP_KERNEL);
if (!phdrs) {
ret = -ENOMEM;
goto out;
}
phdrs[0].p_type = PT_NOTE;
phdrs[0].p_offset = notes_offset;
phdrs[0].p_filesz = notes_len;
phdr = &phdrs[1];
list_for_each_entry(m, &kclist_head, list) {
phdr->p_type = PT_LOAD;
phdr->p_flags = PF_R | PF_W | PF_X;
phdr->p_offset = kc_vaddr_to_offset(m->addr) + data_offset;
phdr->p_vaddr = (size_t)m->addr;
if (m->type == KCORE_RAM)
phdr->p_paddr = __pa(m->addr);
else if (m->type == KCORE_TEXT)
phdr->p_paddr = __pa_symbol(m->addr);
else
phdr->p_paddr = (elf_addr_t)-1;
phdr->p_filesz = phdr->p_memsz = m->size;
phdr->p_align = PAGE_SIZE;
phdr++;
}
tsz = min_t(size_t, buflen, phdrs_offset + phdrs_len - *fpos);
if (copy_to_iter((char *)phdrs + *fpos - phdrs_offset, tsz,
iter) != tsz) {
kfree(phdrs);
ret = -EFAULT;
goto out;
}
kfree(phdrs);
buflen -= tsz;
*fpos += tsz;
}
/* ELF note segment. */
if (buflen && *fpos < notes_offset + notes_len) {
struct elf_prstatus prstatus = {};
struct elf_prpsinfo prpsinfo = {
.pr_sname = 'R',
.pr_fname = "vmlinux",
};
char *notes;
size_t i = 0;
strscpy(prpsinfo.pr_psargs, saved_command_line,
sizeof(prpsinfo.pr_psargs));
notes = kzalloc(notes_len, GFP_KERNEL);
if (!notes) {
ret = -ENOMEM;
goto out;
}
append_kcore_note(notes, &i, CORE_STR, NT_PRSTATUS, &prstatus,
sizeof(prstatus));
append_kcore_note(notes, &i, CORE_STR, NT_PRPSINFO, &prpsinfo,
sizeof(prpsinfo));
append_kcore_note(notes, &i, CORE_STR, NT_TASKSTRUCT, current,
arch_task_struct_size);
/*
* vmcoreinfo_size is mostly constant after init time, but it
* can be changed by crash_save_vmcoreinfo(). Racing here with a
* panic on another CPU before the machine goes down is insanely
* unlikely, but it's better to not leave potential buffer
* overflows lying around, regardless.
*/
append_kcore_note(notes, &i, VMCOREINFO_NOTE_NAME, 0,
vmcoreinfo_data,
min(vmcoreinfo_size, notes_len - i));
tsz = min_t(size_t, buflen, notes_offset + notes_len - *fpos);
if (copy_to_iter(notes + *fpos - notes_offset, tsz, iter) != tsz) {
kfree(notes);
ret = -EFAULT;
goto out;
}
kfree(notes);
buflen -= tsz;
*fpos += tsz;
}
/*
* Check to see if our file offset matches with any of
* the addresses in the elf_phdr on our list.
*/
start = kc_offset_to_vaddr(*fpos - data_offset);
if ((tsz = (PAGE_SIZE - (start & ~PAGE_MASK))) > buflen)
tsz = buflen;
m = NULL;
while (buflen) {
struct page *page;
unsigned long pfn;
/*
* If this is the first iteration or the address is not within
* the previous entry, search for a matching entry.
*/
if (!m || start < m->addr || start >= m->addr + m->size) {
struct kcore_list *iter;
m = NULL;
list_for_each_entry(iter, &kclist_head, list) {
if (start >= iter->addr &&
start < iter->addr + iter->size) {
m = iter;
break;
}
}
}
if (page_offline_frozen++ % MAX_ORDER_NR_PAGES == 0) {
page_offline_thaw();
cond_resched();
page_offline_freeze();
}
if (!m) {
if (iov_iter_zero(tsz, iter) != tsz) {
ret = -EFAULT;
goto out;
}
goto skip;
}
switch (m->type) {
case KCORE_VMALLOC:
{
const char *src = (char *)start;
size_t read = 0, left = tsz;
/*
* vmalloc uses spinlocks, so we optimistically try to
* read memory. If this fails, fault pages in and try
* again until we are done.
*/
while (true) {
read += vread_iter(iter, src, left);
if (read == tsz)
break;
src += read;
left -= read;
if (fault_in_iov_iter_writeable(iter, left)) {
ret = -EFAULT;
goto out;
}
}
break;
}
case KCORE_USER:
/* User page is handled prior to normal kernel page: */
if (copy_to_iter((char *)start, tsz, iter) != tsz) {
ret = -EFAULT;
goto out;
}
break;
case KCORE_RAM:
pfn = __pa(start) >> PAGE_SHIFT;
page = pfn_to_online_page(pfn);
/*
* Don't read offline sections, logically offline pages
* (e.g., inflated in a balloon), hwpoisoned pages,
* and explicitly excluded physical ranges.
*/
if (!page || PageOffline(page) ||
is_page_hwpoison(page) || !pfn_is_ram(pfn) ||
pfn_is_unaccepted_memory(pfn)) {
if (iov_iter_zero(tsz, iter) != tsz) {
ret = -EFAULT;
goto out;
}
break;
}
fallthrough;
case KCORE_VMEMMAP:
case KCORE_TEXT:
/*
* Sadly we must use a bounce buffer here to be able to
* make use of copy_from_kernel_nofault(), as these
* memory regions might not always be mapped on all
* architectures.
*/
if (copy_from_kernel_nofault(buf, (void *)start, tsz)) {
if (iov_iter_zero(tsz, iter) != tsz) {
ret = -EFAULT;
goto out;
}
/*
* We know the bounce buffer is safe to copy from, so
* use _copy_to_iter() directly.
*/
} else if (_copy_to_iter(buf, tsz, iter) != tsz) {
ret = -EFAULT;
goto out;
}
break;
default:
pr_warn_once("Unhandled KCORE type: %d\n", m->type);
if (iov_iter_zero(tsz, iter) != tsz) {
ret = -EFAULT;
goto out;
}
}
skip:
buflen -= tsz;
*fpos += tsz;
start += tsz;
tsz = (buflen > PAGE_SIZE ? PAGE_SIZE : buflen);
}
out:
page_offline_thaw();
up_read(&kclist_lock);
if (ret)
return ret;
return orig_buflen - buflen;
}
static int open_kcore(struct inode *inode, struct file *filp)
{
int ret = security_locked_down(LOCKDOWN_KCORE);
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
if (ret)
return ret;
filp->private_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!filp->private_data)
return -ENOMEM;
if (kcore_need_update)
kcore_update_ram();
if (i_size_read(inode) != proc_root_kcore->size) {
inode_lock(inode);
i_size_write(inode, proc_root_kcore->size);
inode_unlock(inode);
}
return 0;
}
static int release_kcore(struct inode *inode, struct file *file)
{
kfree(file->private_data);
return 0;
}
static const struct proc_ops kcore_proc_ops = {
.proc_read_iter = read_kcore_iter,
.proc_open = open_kcore,
.proc_release = release_kcore,
.proc_lseek = default_llseek,
};
/* just remember that we have to update kcore */
static int __meminit kcore_callback(struct notifier_block *self,
unsigned long action, void *arg)
{
switch (action) {
case MEM_ONLINE:
case MEM_OFFLINE:
kcore_need_update = 1;
break;
}
return NOTIFY_OK;
}
static struct kcore_list kcore_vmalloc;
#ifdef CONFIG_ARCH_PROC_KCORE_TEXT
static struct kcore_list kcore_text;
/*
* If defined, special segment is used for mapping kernel text instead of
* direct-map area. We need to create special TEXT section.
*/
static void __init proc_kcore_text_init(void)
{
kclist_add(&kcore_text, _text, _end - _text, KCORE_TEXT);
}
#else
static void __init proc_kcore_text_init(void)
{
}
#endif
#if defined(CONFIG_MODULES) && defined(MODULES_VADDR)
/*
* MODULES_VADDR has no intersection with VMALLOC_ADDR.
*/
static struct kcore_list kcore_modules;
static void __init add_modules_range(void)
{
if (MODULES_VADDR != VMALLOC_START && MODULES_END != VMALLOC_END) {
kclist_add(&kcore_modules, (void *)MODULES_VADDR,
MODULES_END - MODULES_VADDR, KCORE_VMALLOC);
}
}
#else
static void __init add_modules_range(void)
{
}
#endif
static int __init proc_kcore_init(void)
{
proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &kcore_proc_ops);
if (!proc_root_kcore) {
pr_err("couldn't create /proc/kcore\n");
return 0; /* Always returns 0. */
}
/* Store text area if it's special */
proc_kcore_text_init();
/* Store vmalloc area */
kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
VMALLOC_END - VMALLOC_START, KCORE_VMALLOC);
add_modules_range();
/* Store direct-map area from physical memory map */
kcore_update_ram();
hotplug_memory_notifier(kcore_callback, DEFAULT_CALLBACK_PRI);
return 0;
}
fs_initcall(proc_kcore_init);