Revision 4e2c6567efdd6f252e1874c41c8db4abfb0a9bf3 authored by Song Liu on 09 December 2020, 19:43:43 UTC, committed by Song Liu on 10 December 2020, 04:46:01 UTC
This reverts commit f046f5d0d79cdb968f219ce249e497fd1accf484. Matthew Ruffell reported data corruption in raid10 due to the changes in discard handling [1]. Revert these changes before we find a proper fix. [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1907262/ Cc: Matthew Ruffell <matthew.ruffell@canonical.com> Cc: Xiao Ni <xni@redhat.com> Signed-off-by: Song Liu <songliubraving@fb.com>
1 parent d7cb6be
configs.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* kernel/configs.c
* Echo the kernel .config file used to build the kernel
*
* Copyright (C) 2002 Khalid Aziz <khalid_aziz@hp.com>
* Copyright (C) 2002 Randy Dunlap <rdunlap@xenotime.net>
* Copyright (C) 2002 Al Stone <ahs3@fc.hp.com>
* Copyright (C) 2002 Hewlett-Packard Company
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/uaccess.h>
/*
* "IKCFG_ST" and "IKCFG_ED" are used to extract the config data from
* a binary kernel image or a module. See scripts/extract-ikconfig.
*/
asm (
" .pushsection .rodata, \"a\" \n"
" .ascii \"IKCFG_ST\" \n"
" .global kernel_config_data \n"
"kernel_config_data: \n"
" .incbin \"kernel/config_data.gz\" \n"
" .global kernel_config_data_end \n"
"kernel_config_data_end: \n"
" .ascii \"IKCFG_ED\" \n"
" .popsection \n"
);
#ifdef CONFIG_IKCONFIG_PROC
extern char kernel_config_data;
extern char kernel_config_data_end;
static ssize_t
ikconfig_read_current(struct file *file, char __user *buf,
size_t len, loff_t * offset)
{
return simple_read_from_buffer(buf, len, offset,
&kernel_config_data,
&kernel_config_data_end -
&kernel_config_data);
}
static const struct proc_ops config_gz_proc_ops = {
.proc_read = ikconfig_read_current,
.proc_lseek = default_llseek,
};
static int __init ikconfig_init(void)
{
struct proc_dir_entry *entry;
/* create the current config file */
entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL,
&config_gz_proc_ops);
if (!entry)
return -ENOMEM;
proc_set_size(entry, &kernel_config_data_end - &kernel_config_data);
return 0;
}
static void __exit ikconfig_cleanup(void)
{
remove_proc_entry("config.gz", NULL);
}
module_init(ikconfig_init);
module_exit(ikconfig_cleanup);
#endif /* CONFIG_IKCONFIG_PROC */
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Randy Dunlap");
MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel");
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