Revision 5befb98b30cce19bdf2221ea48c39f1fec5c4568 authored by Linus Torvalds on 24 August 2013, 18:33:21 UTC, committed by Linus Torvalds on 24 August 2013, 18:33:21 UTC
Pull SCSI fixes from James Bottomley:
 "This is a set of small bug fixes for lpfc and zfcp and a fix for a
  fairly nasty bug in sg where a process which cancels I/O completes in
  a kernel thread which would then try to write back to the now gone
  userspace and end up writing to a random kernel address instead"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  [SCSI] zfcp: remove access control tables interface (keep sysfs files)
  [SCSI] zfcp: fix schedule-inside-lock in scsi_device list loops
  [SCSI] zfcp: fix lock imbalance by reworking request queue locking
  [SCSI] sg: Fix user memory corruption when SG_IO is interrupted by a signal
  [SCSI] lpfc: Don't force CONFIG_GENERIC_CSUM on
2 parent s b0f55f2 + b5dc3c4
Raw File
crash_dump.c
#include <linux/kernel.h>
#include <linux/crash_dump.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/export.h>

/*
 * If we have booted due to a crash, max_pfn will be a very low value. We need
 * to know the amount of memory that the previous kernel used.
 */
unsigned long saved_max_pfn;

/*
 * stores the physical address of elf header of crash image
 *
 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
 * is_kdump_kernel() to determine if we are booting after a panic. Hence put
 * it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
 */
unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;

/*
 * stores the size of elf header of crash image
 */
unsigned long long elfcorehdr_size;

/*
 * elfcorehdr= specifies the location of elf core header stored by the crashed
 * kernel. This option will be passed by kexec loader to the capture kernel.
 *
 * Syntax: elfcorehdr=[size[KMG]@]offset[KMG]
 */
static int __init setup_elfcorehdr(char *arg)
{
	char *end;
	if (!arg)
		return -EINVAL;
	elfcorehdr_addr = memparse(arg, &end);
	if (*end == '@') {
		elfcorehdr_size = elfcorehdr_addr;
		elfcorehdr_addr = memparse(end + 1, &end);
	}
	return end > arg ? 0 : -EINVAL;
}
early_param("elfcorehdr", setup_elfcorehdr);
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