Remove crash driver

This has since been replaced by other in kernel pieces. We
can finally drop it.

Signed-off-by: Laura Abbott <labbott@redhat.com>

1 files changed, 0 insertions, 722 deletions

diff --git a/crash-driver.patch b/crash-driver.patch
deleted file mode 100644
index 164dc90f5..000000000
--- a/crash-driver.patch
+++ /dev/null
@@ -1,722 +0,0 @@
-From 973e23bf27b0b2e5021321357fc570cccea3104c Mon Sep 17 00:00:00 2001
-From: Dave Anderson <anderson@redhat.com>
-Date: Tue, 26 Nov 2013 12:42:46 -0500
-Subject: [PATCH] crash-driver
-
-Bugzilla: N/A
-Upstream-status: Fedora mustard
----
- arch/arm/include/asm/crash-driver.h     |   6 ++
- arch/arm64/include/asm/crash-driver.h   |   6 ++
- arch/ia64/include/asm/crash-driver.h    |  90 ++++++++++++++++++++++
- arch/ia64/kernel/ia64_ksyms.c           |   3 +
- arch/powerpc/include/asm/crash-driver.h |   6 ++
- arch/s390/include/asm/crash-driver.h    |  60 +++++++++++++++
- arch/s390/mm/maccess.c                  |   2 +
- arch/x86/include/asm/crash-driver.h     |   6 ++
- drivers/char/Kconfig                    |   3 +
- drivers/char/Makefile                   |   2 +
- drivers/char/crash.c                    | 128 ++++++++++++++++++++++++++++++++
- include/asm-generic/crash-driver.h      |  72 ++++++++++++++++++
- 12 files changed, 384 insertions(+)
- create mode 100644 arch/arm/include/asm/crash-driver.h
- create mode 100644 arch/arm64/include/asm/crash-driver.h
- create mode 100644 arch/ia64/include/asm/crash-driver.h
- create mode 100644 arch/powerpc/include/asm/crash-driver.h
- create mode 100644 arch/s390/include/asm/crash-driver.h
- create mode 100644 arch/x86/include/asm/crash-driver.h
- create mode 100644 drivers/char/crash.c
- create mode 100644 include/asm-generic/crash-driver.h
-
-diff --git a/arch/arm/include/asm/crash-driver.h b/arch/arm/include/asm/crash-driver.h
-new file mode 100644
-index 0000000..06e7ae9
---- /dev/null
-+++ b/arch/arm/include/asm/crash-driver.h
-@@ -0,0 +1,6 @@
-+#ifndef _ARM_CRASH_H
-+#define _ARM_CRASH_H
-+
-+#include <asm-generic/crash-driver.h>
-+
-+#endif /* _ARM_CRASH_H */
-diff --git a/arch/arm64/include/asm/crash-driver.h b/arch/arm64/include/asm/crash-driver.h
-new file mode 100644
-index 0000000..43b26da
---- /dev/null
-+++ b/arch/arm64/include/asm/crash-driver.h
-@@ -0,0 +1,6 @@
-+#ifndef _ARM64_CRASH_H
-+#define _ARM64_CRASH_H
-+
-+#include <asm-generic/crash-driver.h>
-+
-+#endif /* _ARM64_CRASH_H */
-diff --git a/arch/ia64/include/asm/crash-driver.h b/arch/ia64/include/asm/crash-driver.h
-new file mode 100644
-index 0000000..404bcb9
---- /dev/null
-+++ b/arch/ia64/include/asm/crash-driver.h
-@@ -0,0 +1,90 @@
-+#ifndef _ASM_IA64_CRASH_H
-+#define _ASM_IA64_CRASH_H
-+
-+/*
-+ * linux/include/asm-ia64/crash-driver.h
-+ *
-+ * Copyright (c) 2004 Red Hat, Inc. All rights reserved.
-+ *
-+ * 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, or (at your option)
-+ * any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ *
-+ */
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/efi.h>
-+#include <linux/mm.h>
-+#include <asm/mmzone.h>
-+
-+static inline void *
-+map_virtual(u64 offset, struct page **pp)
-+{
-+	struct page *page;
-+	unsigned long pfn;
-+	u32 type;
-+
-+	if (REGION_NUMBER(offset) == 5) {
-+		char byte;
-+
-+		if (__get_user(byte, (char *)offset) == 0)
-+			return (void *)offset;
-+		else
-+			return NULL;
-+	}
-+
-+	switch (type = efi_mem_type(offset))
-+	{
-+	case EFI_LOADER_CODE:
-+	case EFI_LOADER_DATA:
-+	case EFI_BOOT_SERVICES_CODE:
-+	case EFI_BOOT_SERVICES_DATA:
-+	case EFI_CONVENTIONAL_MEMORY:
-+		break;
-+
-+	default:
-+		printk(KERN_INFO
-+		    "crash memory driver: invalid memory type for %lx: %d\n",
-+			offset, type);
-+		return NULL;
-+	}
-+
-+	pfn = offset >> PAGE_SHIFT;
-+
-+	if (!pfn_valid(pfn)) {
-+		printk(KERN_INFO
-+			"crash memory driver: invalid pfn: %lx )\n", pfn);
-+		return NULL;
-+	}
-+
-+	page = pfn_to_page(pfn);
-+
-+	if (!page->virtual) {
-+		printk(KERN_INFO
-+		    "crash memory driver: offset: %lx page: %lx page->virtual: NULL\n",
-+			offset, (unsigned long)page);
-+		return NULL;
-+	}
-+
-+	return (page->virtual + (offset & (PAGE_SIZE-1)));
-+}
-+
-+static inline void unmap_virtual(struct page *page)
-+{
-+	return;
-+}
-+
-+#endif /* __KERNEL__ */
-+
-+#endif /* _ASM_IA64_CRASH_H */
-diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
-index d111248..b14b4c6 100644
---- a/arch/ia64/kernel/ia64_ksyms.c
-+++ b/arch/ia64/kernel/ia64_ksyms.c
-@@ -9,3 +9,6 @@
- EXPORT_SYMBOL(min_low_pfn);	/* defined by bootmem.c, but not exported by generic code */
- EXPORT_SYMBOL(max_low_pfn);	/* defined by bootmem.c, but not exported by generic code */
- #endif
-+
-+#include <linux/efi.h>
-+EXPORT_SYMBOL_GPL(efi_mem_type);
-diff --git a/arch/powerpc/include/asm/crash-driver.h b/arch/powerpc/include/asm/crash-driver.h
-new file mode 100644
-index 0000000..50092d9
---- /dev/null
-+++ b/arch/powerpc/include/asm/crash-driver.h
-@@ -0,0 +1,6 @@
-+#ifndef _PPC64_CRASH_H
-+#define _PPC64_CRASH_H
-+
-+#include <asm-generic/crash-driver.h>
-+
-+#endif /* _PPC64_CRASH_H */
-diff --git a/arch/s390/include/asm/crash-driver.h b/arch/s390/include/asm/crash-driver.h
-new file mode 100644
-index 0000000..552be5e
---- /dev/null
-+++ b/arch/s390/include/asm/crash-driver.h
-@@ -0,0 +1,60 @@
-+#ifndef _S390_CRASH_H
-+#define _S390_CRASH_H
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/mm.h>
-+#include <linux/highmem.h>
-+
-+/*
-+ * For swapped prefix pages get bounce buffer using xlate_dev_mem_ptr()
-+ */
-+static inline void *map_virtual(u64 offset, struct page **pp)
-+{
-+	struct page *page;
-+	unsigned long pfn;
-+	void *vaddr;
-+
-+	vaddr = xlate_dev_mem_ptr(offset);
-+	pfn = ((unsigned long) vaddr) >> PAGE_SHIFT;
-+	if ((unsigned long) vaddr != offset)
-+		page = pfn_to_page(pfn);
-+	else
-+		page = NULL;
-+
-+	if (!page_is_ram(pfn)) {
-+		printk(KERN_INFO
-+		    "crash memory driver: !page_is_ram(pfn: %lx)\n", pfn);
-+		return NULL;
-+	}
-+
-+	if (!pfn_valid(pfn)) {
-+		printk(KERN_INFO
-+		    "crash memory driver: invalid pfn: %lx )\n", pfn);
-+		return NULL;
-+	}
-+
-+	*pp = page;
-+	return vaddr;
-+}
-+
-+/*
-+ * Free bounce buffer if necessary
-+ */
-+static inline void unmap_virtual(struct page *page)
-+{
-+	void *vaddr;
-+
-+	if (page) {
-+		/*
-+		 * Because for bounce buffers vaddr will never be 0
-+		 * unxlate_dev_mem_ptr() will always free the bounce buffer.
-+		 */
-+		vaddr = (void *)(page_to_pfn(page) << PAGE_SHIFT);
-+		unxlate_dev_mem_ptr(0, vaddr);
-+	}
-+}
-+
-+#endif /* __KERNEL__ */
-+
-+#endif /* _S390_CRASH_H */
-diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c
-index 792f9c6..3197995 100644
---- a/arch/s390/mm/maccess.c
-+++ b/arch/s390/mm/maccess.c
-@@ -201,6 +201,7 @@ void *xlate_dev_mem_ptr(phys_addr_t addr)
- 	put_online_cpus();
- 	return bounce;
- }
-+EXPORT_SYMBOL_GPL(xlate_dev_mem_ptr);
- 
- /*
-  * Free converted buffer for /dev/mem access (if necessary)
-@@ -210,3 +211,4 @@ void unxlate_dev_mem_ptr(phys_addr_t addr, void *buf)
- 	if ((void *) addr != buf)
- 		free_page((unsigned long) buf);
- }
-+EXPORT_SYMBOL_GPL(unxlate_dev_mem_ptr);
-diff --git a/arch/x86/include/asm/crash-driver.h b/arch/x86/include/asm/crash-driver.h
-new file mode 100644
-index 0000000..fd4736e
---- /dev/null
-+++ b/arch/x86/include/asm/crash-driver.h
-@@ -0,0 +1,6 @@
-+#ifndef _X86_CRASH_H
-+#define _X86_CRASH_H
-+
-+#include <asm-generic/crash-driver.h>
-+
-+#endif /* _X86_CRASH_H */
-diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
-index dcc0973..99b99d5 100644
---- a/drivers/char/Kconfig
-+++ b/drivers/char/Kconfig
-@@ -4,6 +4,9 @@
- 
- menu "Character devices"
- 
-+config CRASH
-+	tristate "Crash Utility memory driver"
-+
- source "drivers/tty/Kconfig"
- 
- config DEVMEM
-diff --git a/drivers/char/Makefile b/drivers/char/Makefile
-index 6e6c244..29cc9c8 100644
---- a/drivers/char/Makefile
-+++ b/drivers/char/Makefile
-@@ -58,3 +58,5 @@ js-rtc-y = rtc.o
- obj-$(CONFIG_XILLYBUS)		+= xillybus/
- obj-$(CONFIG_POWERNV_OP_PANEL)	+= powernv-op-panel.o
- obj-$(CONFIG_ADI)		+= adi.o
-+
-+obj-$(CONFIG_CRASH)            += crash.o
-diff --git a/drivers/char/crash.c b/drivers/char/crash.c
-new file mode 100644
-index 0000000..085378a
---- /dev/null
-+++ b/drivers/char/crash.c
-@@ -0,0 +1,128 @@
-+/*
-+ *  linux/drivers/char/crash.c
-+ *
-+ *  Copyright (C) 2004  Dave Anderson <anderson@redhat.com>
-+ *  Copyright (C) 2004  Red Hat, Inc.
-+ */
-+
-+/******************************************************************************
-+ *
-+ *   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, or (at your option)
-+ *   any later version.
-+ *
-+ *   This program is distributed in the hope that it will be useful,
-+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-+ *   GNU General Public License for more details.
-+ *
-+ *   You should have received a copy of the GNU General Public License
-+ *   along with this program; if not, write to the Free Software
-+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ *
-+ *****************************************************************************/
-+
-+#include <linux/module.h>
-+#include <linux/types.h>
-+#include <linux/miscdevice.h>
-+#include <linux/init.h>
-+#include <asm/io.h>
-+#include <linux/uaccess.h>
-+#include <asm/types.h>
-+#include <asm/crash-driver.h>
-+
-+#define CRASH_VERSION   "1.0"
-+
-+/*
-+ *  These are the file operation functions that allow crash utility
-+ *  access to physical memory.
-+ */
-+
-+static loff_t
-+crash_llseek(struct file * file, loff_t offset, int orig)
-+{
-+	switch (orig) {
-+	case 0:
-+		file->f_pos = offset;
-+		return file->f_pos;
-+	case 1:
-+		file->f_pos += offset;
-+		return file->f_pos;
-+	default:
-+		return -EINVAL;
-+	}
-+}
-+
-+/*
-+ *  Determine the page address for an address offset value,
-+ *  get a virtual address for it, and copy it out.
-+ *  Accesses must fit within a page.
-+ */
-+static ssize_t
-+crash_read(struct file *file, char *buf, size_t count, loff_t *poff)
-+{
-+	void *vaddr;
-+	struct page *page;
-+	u64 offset;
-+	ssize_t read;
-+
-+	offset = *poff;
-+	if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT)
-+		return -EINVAL;
-+
-+	vaddr = map_virtual(offset, &page);
-+	if (!vaddr)
-+		return -EFAULT;
-+
-+	if (copy_to_user(buf, vaddr, count)) {
-+		unmap_virtual(page);
-+		return -EFAULT;
-+	}
-+	unmap_virtual(page);
-+
-+	read = count;
-+	*poff += read;
-+	return read;
-+}
-+
-+static struct file_operations crash_fops = {
-+	.owner = THIS_MODULE,
-+	.llseek = crash_llseek,
-+	.read = crash_read,
-+};
-+
-+static struct miscdevice crash_dev = {
-+	MISC_DYNAMIC_MINOR,
-+	"crash",
-+	&crash_fops
-+};
-+
-+static int __init
-+crash_init(void)
-+{
-+	int ret;
-+
-+	ret = misc_register(&crash_dev);
-+	if (ret) {
-+		printk(KERN_ERR
-+		    "crash memory driver: cannot misc_register (MISC_DYNAMIC_MINOR)\n");
-+		goto out;
-+	}
-+
-+	ret = 0;
-+	printk(KERN_INFO "crash memory driver: version %s\n", CRASH_VERSION);
-+out:
-+	return ret;
-+}
-+
-+static void __exit
-+crash_cleanup_module(void)
-+{
-+	misc_deregister(&crash_dev);
-+}
-+
-+module_init(crash_init);
-+module_exit(crash_cleanup_module);
-+
-+MODULE_LICENSE("GPL");
-diff --git a/include/asm-generic/crash-driver.h b/include/asm-generic/crash-driver.h
-new file mode 100644
-index 0000000..25ab986
---- /dev/null
-+++ b/include/asm-generic/crash-driver.h
-@@ -0,0 +1,72 @@
-+#ifndef __CRASH_H__
-+#define __CRASH_H__
-+
-+/*
-+ * include/linux/crash-driver.h
-+ *
-+ * Copyright (c) 2013 Red Hat, Inc. All rights reserved.
-+ *
-+ * 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, or (at your option)
-+ * any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ *
-+ */
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/mm.h>
-+#include <linux/highmem.h>
-+
-+static inline void *
-+map_virtual(u64 offset, struct page **pp)
-+{
-+	struct page *page;
-+	unsigned long pfn;
-+	void *vaddr;
-+
-+	pfn = (unsigned long)(offset >> PAGE_SHIFT);
-+
-+	if (!page_is_ram(pfn)) {
-+		printk(KERN_INFO
-+		    "crash memory driver: !page_is_ram(pfn: %lx)\n", pfn);
-+		return NULL;
-+	}
-+
-+	if (!pfn_valid(pfn)) {
-+		printk(KERN_INFO
-+		    "crash memory driver: invalid pfn: %lx )\n", pfn);
-+		return NULL;
-+	}
-+
-+	page = pfn_to_page(pfn);
-+
-+	vaddr = kmap(page);
-+	if (!vaddr) {
-+		printk(KERN_INFO
-+		    "crash memory driver: pfn: %lx kmap(page: %lx) failed\n",
-+			pfn, (unsigned long)page);
-+		return NULL;
-+	}
-+
-+	*pp = page;
-+	return (vaddr + (offset & (PAGE_SIZE-1)));
-+}
-+
-+static inline void unmap_virtual(struct page *page)
-+{
-+	kunmap(page);
-+}
-+
-+#endif /* __KERNEL__ */
-+
-+#endif /* __CRASH_H__ */
--- 
-2.7.4
-
-From 23d8bd48303acda2d3a95a3e1a662784a4fa9fcd Mon Sep 17 00:00:00 2001
-From: Fedora Kernel Team <kernel-team@fedoraproject.org>
-Date: Tue, 20 Sep 2016 19:39:46 +0200
-Subject: [PATCH] Update of crash driver to handle CONFIG_HARDENED_USERCOPY and
- to restrict the supported architectures.
-
----
- drivers/char/Kconfig |  1 +
- drivers/char/crash.c | 33 ++++++++++++++++++++++++++++++---
- 2 files changed, 31 insertions(+), 3 deletions(-)
-
-diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
-index 99b99d5..be6a3ae 100644
---- a/drivers/char/Kconfig
-+++ b/drivers/char/Kconfig
-@@ -6,6 +6,7 @@ menu "Character devices"
- 
- config CRASH
- 	tristate "Crash Utility memory driver"
-+	depends on X86_32 || X86_64 || ARM || ARM64 || PPC64 || S390
- 
- source "drivers/tty/Kconfig"
- 
-diff --git a/drivers/char/crash.c b/drivers/char/crash.c
-index 085378a..0258bf8 100644
---- a/drivers/char/crash.c
-+++ b/drivers/char/crash.c
-@@ -32,7 +32,7 @@
- #include <asm/types.h>
- #include <asm/crash-driver.h>
- 
--#define CRASH_VERSION   "1.0"
-+#define CRASH_VERSION   "1.2"
- 
- /*
-  *  These are the file operation functions that allow crash utility
-@@ -66,6 +66,7 @@ crash_read(struct file *file, char *buf, size_t count, loff_t *poff)
- 	struct page *page;
- 	u64 offset;
- 	ssize_t read;
-+	char *buffer = file->private_data;
- 
- 	offset = *poff;
- 	if (offset >> PAGE_SHIFT != (offset+count-1) >> PAGE_SHIFT)
-@@ -74,8 +75,12 @@ crash_read(struct file *file, char *buf, size_t count, loff_t *poff)
- 	vaddr = map_virtual(offset, &page);
- 	if (!vaddr)
- 		return -EFAULT;
--
--	if (copy_to_user(buf, vaddr, count)) {
-+	/*
-+	 * Use bounce buffer to bypass the CONFIG_HARDENED_USERCOPY
-+	 * kernel text restriction.
-+	*/
-+	memcpy(buffer, (char *)vaddr, count);
-+	if (copy_to_user(buf, buffer, count)) {
- 		unmap_virtual(page);
- 		return -EFAULT;
- 	}
-@@ -86,10 +91,32 @@ crash_read(struct file *file, char *buf, size_t count, loff_t *poff)
- 	return read;
- }
- 
-+static int
-+crash_open(struct inode * inode, struct file * filp)
-+{
-+	if (!capable(CAP_SYS_RAWIO))
-+		return -EPERM;
-+
-+	filp->private_data = (void *)__get_free_page(GFP_KERNEL);
-+	if (!filp->private_data)
-+		return -ENOMEM;
-+
-+	return 0;
-+}
-+
-+static int
-+crash_release(struct inode *inode, struct file *filp)
-+{
-+	free_pages((unsigned long)filp->private_data, 0);
-+	return 0;
-+}
-+
- static struct file_operations crash_fops = {
- 	.owner = THIS_MODULE,
- 	.llseek = crash_llseek,
- 	.read = crash_read,
-+	.open = crash_open,
-+	.release = crash_release,
- };
- 
- static struct miscdevice crash_dev = {
--- 
-2.7.4
-
-From: Dave Anderson <anderson@redhat.com>
-Date: Fri, 18 Nov 2016 11:52:35 -0500
-Cc: onestero@redhat.com
-Subject: [PATCH v2] Restore live system crash analysis for ARM64
-
-This v2 version simplifies the copy out of the kimage_voffset value
-to user-space per Oleg's suggestion.
-
-Upstream status: N/A
-
-Test: v2 version tested successfully with a modified crash utility
-
-The following Linux 4.6 commit breaks support for live system
-crash analysis on ARM64:
-
-   commit a7f8de168ace487fa7b88cb154e413cf40e87fc6
-   Author: Ard Biesheuvel <ard.biesheuvel@linaro.org>
-   arm64: allow kernel Image to be loaded anywhere in physical memory
-
-The patchset drastically modified the kernel's virtual memory layout,
-where notably the static kernel text and data image was moved from the
-unity mapped region into the vmalloc region.  Prior to Linux 4.6,
-the kernel's __virt_to_phys() function was this:
-
- #define __virt_to_phys(x)  (((phys_addr_t)(x) - PAGE_OFFSET + PHYS_OFFSET))
-
-When running on a live system, the crash utility could determine PAGE_OFFSET
-by looking at the virtual addresses compiled into the vmlinux file, and
-PHYS_OFFSET can be determined by looking at /proc/iomem.
-
-As of Linux 4.6, it is done differently:
-
- #define __virt_to_phys(x) ({                                            \
-        phys_addr_t __x = (phys_addr_t)(x);                             \
-        __x & BIT(VA_BITS - 1) ? (__x & ~PAGE_OFFSET) + PHYS_OFFSET :   \
-                                 (__x - kimage_voffset); })
-
-The PAGE_OFFSET/PHYS_OFFSET section of the conditional expression is for
-traditional unity-mapped virtual addresses, but kernel text and static
-data requires the new "kimage_voffset" variable.  Unfortunately, the
-contents of the new "kimage_voffset" variable is not available or
-calculatable from a user-space perspective, even with root privileges.
-
-At least the ARM64 developers made its contents available to modules
-with an EXPORT_SYMBOL(kimage_voffset) declaration.  Accordingly, with
-a modification to the /dev/crash driver to return its contents, the
-crash utility can run on a live system.
-
-The patch allows for architecture-specific DEV_CRASH_ARCH_DATA ioctls
-to be created, where this is the first instance of one.
-
-
----
- arch/arm64/include/asm/crash-driver.h | 16 ++++++++++++++++
- drivers/char/crash.c                  | 13 ++++++++++++-
- 2 files changed, 28 insertions(+), 1 deletion(-)
-
-diff --git a/arch/arm64/include/asm/crash-driver.h b/arch/arm64/include/asm/crash-driver.h
-index 43b26da..fe68e7c 100644
---- a/arch/arm64/include/asm/crash-driver.h
-+++ b/arch/arm64/include/asm/crash-driver.h
-@@ -3,4 +3,20 @@
- 
- #include <asm-generic/crash-driver.h>
- 
-+#define DEV_CRASH_ARCH_DATA _IOR('c', 1, long)
-+
-+static long
-+crash_arch_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-+{
-+	extern u64 kimage_voffset;
-+
-+	switch (cmd)
-+	{
-+	case DEV_CRASH_ARCH_DATA:
-+		return put_user(kimage_voffset, (unsigned long __user *)arg);
-+	default:
-+		return -EINVAL;
-+	}
-+}
-+
- #endif /* _ARM64_CRASH_H */
-diff --git a/drivers/char/crash.c b/drivers/char/crash.c
-index 0258bf8..dfb767c 100644
---- a/drivers/char/crash.c
-+++ b/drivers/char/crash.c
-@@ -32,7 +32,7 @@
- #include <asm/types.h>
- #include <asm/crash-driver.h>
- 
--#define CRASH_VERSION   "1.2"
-+#define CRASH_VERSION   "1.3"
- 
- /*
-  *  These are the file operation functions that allow crash utility
-@@ -111,10 +111,21 @@ crash_release(struct inode *inode, struct file *filp)
- 	return 0;
- }
- 
-+static long
-+crash_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-+{
-+#ifdef DEV_CRASH_ARCH_DATA
-+	return crash_arch_ioctl(file, cmd, arg);
-+#else
-+	return -EINVAL;
-+#endif
-+}
-+
- static struct file_operations crash_fops = {
- 	.owner = THIS_MODULE,
- 	.llseek = crash_llseek,
- 	.read = crash_read,
-+	.unlocked_ioctl = crash_ioctl,
- 	.open = crash_open,
- 	.release = crash_release,
- };
--- 
-1.8.3.1
-