diff options
Diffstat (limited to 'arch/ia64/kernel/crash_dump.c')
| -rw-r--r-- | arch/ia64/kernel/crash_dump.c | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/arch/ia64/kernel/crash_dump.c b/arch/ia64/kernel/crash_dump.c deleted file mode 100644 index 0ed3c3dee4cd..000000000000 --- a/arch/ia64/kernel/crash_dump.c +++ /dev/null @@ -1,51 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * kernel/crash_dump.c - Memory preserving reboot related code. - * - * Created by: Simon Horman <horms@verge.net.au> - * Original code moved from kernel/crash.c - * Original code comment copied from the i386 version of this file - */ - -#include <linux/errno.h> -#include <linux/types.h> -#include <linux/crash_dump.h> - -#include <asm/page.h> -#include <linux/uaccess.h> - -/** - * 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 = __va(pfn<<PAGE_SHIFT); - if (userbuf) { - if (copy_to_user(buf, (vaddr + offset), csize)) { - return -EFAULT; - } - } else - memcpy(buf, (vaddr + offset), csize); - return csize; -} - |