i386: prepare shared kernel/crash_dump.c

[pandora-kernel.git] / arch / i386 / kernel / crash_dump.c

diff --git a/arch/i386/kernel/crash_dump.c b/arch/i386/kernel/crash_dump.c
deleted file mode 100644 (file)
index 3f532df..0000000
--- a/arch/i386/kernel/crash_dump.c
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- *     kernel/crash_dump.c - Memory preserving reboot related code.
- *
- *     Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
- *     Copyright (C) IBM Corporation, 2004. All rights reserved
- */
-
-#include <linux/errno.h>
-#include <linux/highmem.h>
-#include <linux/crash_dump.h>
-
-#include <asm/uaccess.h>
-
-static void *kdump_buf_page;
-
-/**
- * copy_oldmem_page - copy one page from "oldmem"
- * @pfn: page frame number to be copied
- * @buf: target memory address for the copy; this can be in kernel address
- *     space or user address space (see @userbuf)
- * @csize: number of bytes to copy
- * @offset: offset in bytes into the page (based on pfn) to begin the copy
- * @userbuf: if set, @buf is in user address space, use copy_to_user(),
- *     otherwise @buf is in kernel address space, use memcpy().
- *
- * Copy a page from "oldmem". For this page, there is no pte mapped
- * in the current kernel. We stitch up a pte, similar to kmap_atomic.
- *
- * Calling copy_to_user() in atomic context is not desirable. Hence first
- * copying the data to a pre-allocated kernel page and then copying to user
- * space in non-atomic context.
- */
-ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
-                               size_t csize, unsigned long offset, int userbuf)
-{
-       void  *vaddr;
-
-       if (!csize)
-               return 0;
-
-       vaddr = kmap_atomic_pfn(pfn, KM_PTE0);
-
-       if (!userbuf) {
-               memcpy(buf, (vaddr + offset), csize);
-               kunmap_atomic(vaddr, KM_PTE0);
-       } else {
-               if (!kdump_buf_page) {
-                       printk(KERN_WARNING "Kdump: Kdump buffer page not"
-                               " allocated\n");
-                       return -EFAULT;
-               }
-               copy_page(kdump_buf_page, vaddr);
-               kunmap_atomic(vaddr, KM_PTE0);
-               if (copy_to_user(buf, (kdump_buf_page + offset), csize))
-                       return -EFAULT;
-       }
-
-       return csize;
-}
-
-static int __init kdump_buf_page_init(void)
-{
-       int ret = 0;
-
-       kdump_buf_page = kmalloc(PAGE_SIZE, GFP_KERNEL);
-       if (!kdump_buf_page) {
-               printk(KERN_WARNING "Kdump: Failed to allocate kdump buffer"
-                        " page\n");
-               ret = -ENOMEM;
-       }
-
-       return ret;
-}
-arch_initcall(kdump_buf_page_init);