From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/arch/powerpc/kernel/nvram_64.c | 183 +++------------------------------------------
1 files changed, 13 insertions(+), 170 deletions(-)
diff --git a/kernel/arch/powerpc/kernel/nvram_64.c b/kernel/arch/powerpc/kernel/nvram_64.c
index e7d4ce6..1ef55f4 100644
--- a/kernel/arch/powerpc/kernel/nvram_64.c
+++ b/kernel/arch/powerpc/kernel/nvram_64.c
@@ -1,18 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* c 2001 PPC 64 Team, IBM Corp
*
- * 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 of the License, or (at your option) any later version.
- *
* /dev/nvram driver for PPC64
- *
- * This perhaps should live in drivers/char
- *
- * TODO: Split the /dev/nvram part (that one can use
- * drivers/char/generic_nvram.c) from the arch & partition
- * parsing code.
*/
#include <linux/types.h>
@@ -83,7 +73,8 @@
};
static void oops_to_nvram(struct kmsg_dumper *dumper,
- enum kmsg_dump_reason reason);
+ enum kmsg_dump_reason reason,
+ struct kmsg_dumper_iter *iter);
static struct kmsg_dumper nvram_kmsg_dumper = {
.dump = oops_to_nvram
@@ -653,7 +644,8 @@
* partition. If that's too much, go back and capture uncompressed text.
*/
static void oops_to_nvram(struct kmsg_dumper *dumper,
- enum kmsg_dump_reason reason)
+ enum kmsg_dump_reason reason,
+ struct kmsg_dumper_iter *iter)
{
struct oops_log_info *oops_hdr = (struct oops_log_info *)oops_buf;
static unsigned int oops_count = 0;
@@ -665,9 +657,7 @@
int rc = -1;
switch (reason) {
- case KMSG_DUMP_RESTART:
- case KMSG_DUMP_HALT:
- case KMSG_DUMP_POWEROFF:
+ case KMSG_DUMP_SHUTDOWN:
/* These are almost always orderly shutdowns. */
return;
case KMSG_DUMP_OOPS:
@@ -693,13 +683,13 @@
return;
if (big_oops_buf) {
- kmsg_dump_get_buffer(dumper, false,
+ kmsg_dump_get_buffer(iter, false,
big_oops_buf, big_oops_buf_sz, &text_len);
rc = zip_oops(text_len);
}
if (rc != 0) {
- kmsg_dump_rewind(dumper);
- kmsg_dump_get_buffer(dumper, false,
+ kmsg_dump_rewind(iter);
+ kmsg_dump_get_buffer(iter, false,
oops_data, oops_data_sz, &text_len);
err_type = ERR_TYPE_KERNEL_PANIC;
oops_hdr->version = cpu_to_be16(OOPS_HDR_VERSION);
@@ -713,136 +703,6 @@
spin_unlock_irqrestore(&lock, flags);
}
-
-static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin)
-{
- if (ppc_md.nvram_size == NULL)
- return -ENODEV;
- return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE,
- ppc_md.nvram_size());
-}
-
-
-static ssize_t dev_nvram_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- ssize_t ret;
- char *tmp = NULL;
- ssize_t size;
-
- if (!ppc_md.nvram_size) {
- ret = -ENODEV;
- goto out;
- }
-
- size = ppc_md.nvram_size();
- if (size < 0) {
- ret = size;
- goto out;
- }
-
- if (*ppos >= size) {
- ret = 0;
- goto out;
- }
-
- count = min_t(size_t, count, size - *ppos);
- count = min(count, PAGE_SIZE);
-
- tmp = kmalloc(count, GFP_KERNEL);
- if (!tmp) {
- ret = -ENOMEM;
- goto out;
- }
-
- ret = ppc_md.nvram_read(tmp, count, ppos);
- if (ret <= 0)
- goto out;
-
- if (copy_to_user(buf, tmp, ret))
- ret = -EFAULT;
-
-out:
- kfree(tmp);
- return ret;
-
-}
-
-static ssize_t dev_nvram_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- ssize_t ret;
- char *tmp = NULL;
- ssize_t size;
-
- ret = -ENODEV;
- if (!ppc_md.nvram_size)
- goto out;
-
- ret = 0;
- size = ppc_md.nvram_size();
- if (*ppos >= size || size < 0)
- goto out;
-
- count = min_t(size_t, count, size - *ppos);
- count = min(count, PAGE_SIZE);
-
- tmp = memdup_user(buf, count);
- if (IS_ERR(tmp)) {
- ret = PTR_ERR(tmp);
- goto out;
- }
-
- ret = ppc_md.nvram_write(tmp, count, ppos);
-
- kfree(tmp);
-out:
- return ret;
-}
-
-static long dev_nvram_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- switch(cmd) {
-#ifdef CONFIG_PPC_PMAC
- case OBSOLETE_PMAC_NVRAM_GET_OFFSET:
- printk(KERN_WARNING "nvram: Using obsolete PMAC_NVRAM_GET_OFFSET ioctl\n");
- case IOC_NVRAM_GET_OFFSET: {
- int part, offset;
-
- if (!machine_is(powermac))
- return -EINVAL;
- if (copy_from_user(&part, (void __user*)arg, sizeof(part)) != 0)
- return -EFAULT;
- if (part < pmac_nvram_OF || part > pmac_nvram_NR)
- return -EINVAL;
- offset = pmac_get_partition(part);
- if (offset < 0)
- return offset;
- if (copy_to_user((void __user*)arg, &offset, sizeof(offset)) != 0)
- return -EFAULT;
- return 0;
- }
-#endif /* CONFIG_PPC_PMAC */
- default:
- return -EINVAL;
- }
-}
-
-static const struct file_operations nvram_fops = {
- .owner = THIS_MODULE,
- .llseek = dev_nvram_llseek,
- .read = dev_nvram_read,
- .write = dev_nvram_write,
- .unlocked_ioctl = dev_nvram_ioctl,
-};
-
-static struct miscdevice nvram_dev = {
- NVRAM_MINOR,
- "nvram",
- &nvram_fops
-};
-
#ifdef DEBUG_NVRAM
static void __init nvram_print_partitions(char * label)
@@ -991,9 +851,11 @@
long size = 0;
int rc;
+ BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16);
+
/* Convert sizes from bytes to blocks */
- req_size = _ALIGN_UP(req_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
- min_size = _ALIGN_UP(min_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
+ req_size = ALIGN(req_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
+ min_size = ALIGN(min_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
/* If no minimum size specified, make it the same as the
* requested size
@@ -1191,22 +1053,3 @@
kfree(header);
return err;
}
-
-static int __init nvram_init(void)
-{
- int rc;
-
- BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16);
-
- if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0)
- return -ENODEV;
-
- rc = misc_register(&nvram_dev);
- if (rc != 0) {
- printk(KERN_ERR "nvram_init: failed to register device\n");
- return rc;
- }
-
- return rc;
-}
-device_initcall(nvram_init);
--
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