* Shared /dev/zero mmaping support, Feb 2000, Kanoj Sarcar <kanoj@sgi.com>
*/
-#include <linux/config.h>
#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/capability.h>
#include <linux/smp_lock.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/ptrace.h>
#include <linux/device.h>
#include <linux/highmem.h>
#include <linux/crash_dump.h>
#include <linux/backing-dev.h>
#include <linux/bootmem.h>
+#include <linux/pipe_fs_i.h>
#include <asm/uaccess.h>
#include <asm/io.h>
return count;
}
+static int pipe_to_null(struct pipe_inode_info *info, struct pipe_buffer *buf,
+ struct splice_desc *sd)
+{
+ return sd->len;
+}
+
+static ssize_t splice_write_null(struct pipe_inode_info *pipe,struct file *out,
+ loff_t *ppos, size_t len, unsigned int flags)
+{
+ return splice_from_pipe(pipe, out, ppos, len, flags, pipe_to_null);
+}
+
#ifdef CONFIG_MMU
/*
* For fun, we are using the MMU for this.
#define open_kmem open_mem
#define open_oldmem open_mem
-static struct file_operations mem_fops = {
+static const struct file_operations mem_fops = {
.llseek = memory_lseek,
.read = read_mem,
.write = write_mem,
.open = open_mem,
};
-static struct file_operations kmem_fops = {
+static const struct file_operations kmem_fops = {
.llseek = memory_lseek,
.read = read_kmem,
.write = write_kmem,
.open = open_kmem,
};
-static struct file_operations null_fops = {
+static const struct file_operations null_fops = {
.llseek = null_lseek,
.read = read_null,
.write = write_null,
+ .splice_write = splice_write_null,
};
#if defined(CONFIG_ISA) || !defined(__mc68000__)
-static struct file_operations port_fops = {
+static const struct file_operations port_fops = {
.llseek = memory_lseek,
.read = read_port,
.write = write_port,
};
#endif
-static struct file_operations zero_fops = {
+static const struct file_operations zero_fops = {
.llseek = zero_lseek,
.read = read_zero,
.write = write_zero,
.capabilities = BDI_CAP_MAP_COPY,
};
-static struct file_operations full_fops = {
+static const struct file_operations full_fops = {
.llseek = full_lseek,
.read = read_full,
.write = write_full,
};
#ifdef CONFIG_CRASH_DUMP
-static struct file_operations oldmem_fops = {
+static const struct file_operations oldmem_fops = {
.read = read_oldmem,
.open = open_oldmem,
};
return ret;
}
-static struct file_operations kmsg_fops = {
+static const struct file_operations kmsg_fops = {
.write = kmsg_write,
};
return 0;
}
-static struct file_operations memory_fops = {
+static const struct file_operations memory_fops = {
.open = memory_open, /* just a selector for the real open */
};
unsigned int minor;
char *name;
umode_t mode;
- struct file_operations *fops;
+ const struct file_operations *fops;
} devlist[] = { /* list of minor devices */
{1, "mem", S_IRUSR | S_IWUSR | S_IRGRP, &mem_fops},
{2, "kmem", S_IRUSR | S_IWUSR | S_IRGRP, &kmem_fops},
printk("unable to get major %d for memory devs\n", MEM_MAJOR);
mem_class = class_create(THIS_MODULE, "mem");
- for (i = 0; i < ARRAY_SIZE(devlist); i++) {
+ for (i = 0; i < ARRAY_SIZE(devlist); i++)
class_device_create(mem_class, NULL,
MKDEV(MEM_MAJOR, devlist[i].minor),
NULL, devlist[i].name);
- devfs_mk_cdev(MKDEV(MEM_MAJOR, devlist[i].minor),
- S_IFCHR | devlist[i].mode, devlist[i].name);
- }
return 0;
}