Revision a74aa9676c0256eac05efb2c8e3127e0835e66e5 authored by Linus Torvalds on 11 July 2018, 17:10:50 UTC, committed by Linus Torvalds on 11 July 2018, 17:10:50 UTC
Pull char/misc fixes from Greg KH: "Here are a few char/misc driver fixes for 4.18-rc5. The "largest" stuff here is fixes for the UIO changes in 4.18-rc1 that caused breakages for some people. Thanks to Xiubo Li for fixing them quickly. Other than that, minor fixes for thunderbolt, vmw_balloon, nvmem, mei, ibmasm, and mei drivers. There's also a MAINTAINERS update where Rafael is offering to help out with reviewing driver core patches. All of these have been in linux-next with no reported issues" * tag 'char-misc-4.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: nvmem: Don't let a NULL cell_id for nvmem_cell_get() crash us thunderbolt: Notify userspace when boot_acl is changed uio: fix crash after the device is unregistered uio: change to use the mutex lock instead of the spin lock uio: use request_threaded_irq instead fpga: altera-cvp: Fix an error handling path in 'altera_cvp_probe()' ibmasm: don't write out of bounds in read handler MAINTAINERS: Add myself as driver core changes reviewer mei: discard messages from not connected client during power down. vmw_balloon: fix inflation with batching
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;
EXPORT_SYMBOL_GPL(elfcorehdr_addr);
/*
* 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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