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-rw-r--r--kernel/crash_dump.c64
1 files changed, 0 insertions, 64 deletions
diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c
deleted file mode 100644
index fccb27dbc623..000000000000
--- a/kernel/crash_dump.c
+++ /dev/null
@@ -1,64 +0,0 @@
1/*
2 * kernel/crash_dump.c - Memory preserving reboot related code.
3 *
4 * Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
5 * Copyright (C) IBM Corporation, 2004. All rights reserved
6 */
7
8#include <linux/smp_lock.h>
9#include <linux/errno.h>
10#include <linux/proc_fs.h>
11#include <linux/bootmem.h>
12#include <linux/highmem.h>
13#include <linux/crash_dump.h>
14
15#include <asm/io.h>
16#include <asm/uaccess.h>
17#include <asm/kexec.h>
18
19/* Stores the physical address of elf header of crash image. */
20unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
21
22#ifndef HAVE_ARCH_COPY_OLDMEM_PAGE
23/**
24 * copy_oldmem_page - copy one page from "oldmem"
25 * @pfn: page frame number to be copied
26 * @buf: target memory address for the copy; this can be in kernel address
27 * space or user address space (see @userbuf)
28 * @csize: number of bytes to copy
29 * @offset: offset in bytes into the page (based on pfn) to begin the copy
30 * @userbuf: if set, @buf is in user address space, use copy_to_user(),
31 * otherwise @buf is in kernel address space, use memcpy().
32 *
33 * Copy a page from "oldmem". For this page, there is no pte mapped
34 * in the current kernel. We stitch up a pte, similar to kmap_atomic.
35 */
36ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
37 size_t csize, unsigned long offset, int userbuf)
38{
39 void *page, *vaddr;
40
41 if (!csize)
42 return 0;
43
44 page = kmalloc(PAGE_SIZE, GFP_KERNEL);
45 if (!page)
46 return -ENOMEM;
47
48 vaddr = kmap_atomic_pfn(pfn, KM_PTE0);
49 copy_page(page, vaddr);
50 kunmap_atomic(vaddr, KM_PTE0);
51
52 if (userbuf) {
53 if (copy_to_user(buf, (page + offset), csize)) {
54 kfree(page);
55 return -EFAULT;
56 }
57 } else {
58 memcpy(buf, (page + offset), csize);
59 }
60
61 kfree(page);
62 return csize;
63}
64#endif