Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / drivers / char / mem.c

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 6a7aa93..6f9c6cc 100644 (file)
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -8,7 +8,6 @@
  *  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>
@@ -20,7 +19,6 @@
 #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>
@@ -36,6 +34,22 @@
 # include <linux/efi.h>
 #endif
 
+static inline int range_is_allowed(unsigned long from, unsigned long to)
+{
+       unsigned long cursor;
+
+       cursor = from >> PAGE_SHIFT;
+       while ((cursor << PAGE_SHIFT) < to) {
+               if (!devmem_is_allowed(cursor)) {
+                       printk ("Program %s tried to read /dev/mem between %lx->%lx.\n",
+                                       current->comm, from, to);
+                       return 0;
+               }
+               cursor++;
+       }
+       return 1;
+}
+
 /*
  * Architectures vary in how they handle caching for addresses
  * outside of main memory.
@@ -97,28 +111,13 @@ static inline int valid_phys_addr_range(unsigned long addr, size_t count)
        return 1;
 }
 
-static inline int valid_mmap_phys_addr_range(unsigned long addr, size_t size)
+static inline int valid_mmap_phys_addr_range(unsigned long pfn, size_t size)
 {
        return 1;
 }
 #endif
 
-static inline int range_is_allowed(unsigned long from, unsigned long to)
-{
-       unsigned long cursor;
-
-       cursor = from >> PAGE_SHIFT;
-       while ((cursor << PAGE_SHIFT) < to) {
-               if (!devmem_is_allowed(cursor)) {
-                       printk ("Program %s tried to read /dev/mem between %lx->%lx.\n",
-                                       current->comm, from, to);
-                       return 0;
-               }
-               cursor++;
-       }
-       return 1;
-}
-
+#ifndef ARCH_HAS_DEV_MEM
 /*
  * This funcion reads the *physical* memory. The f_pos points directly to the 
  * memory location. 
@@ -245,6 +244,7 @@ static ssize_t write_mem(struct file * file, const char __user * buf,
        *ppos += written;
        return written;
 }
+#endif
 
 #ifndef __HAVE_PHYS_MEM_ACCESS_PROT
 static pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
@@ -264,7 +264,7 @@ static int mmap_mem(struct file * file, struct vm_area_struct * vma)
 {
        size_t size = vma->vm_end - vma->vm_start;
 
-       if (!valid_mmap_phys_addr_range(vma->vm_pgoff << PAGE_SHIFT, size))
+       if (!valid_mmap_phys_addr_range(vma->vm_pgoff, size))
                return -EINVAL;
 
        vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
@@ -681,22 +681,26 @@ static int open_port(struct inode * inode, struct file * filp)
 #define open_kmem      open_mem
 #define open_oldmem    open_mem
 
-static struct file_operations mem_fops = {
+#ifndef ARCH_HAS_DEV_MEM
+static const struct file_operations mem_fops = {
        .llseek         = memory_lseek,
        .read           = read_mem,
        .write          = write_mem,
        .mmap           = mmap_mem,
        .open           = open_mem,
 };
+#else
+extern struct file_operations mem_fops;
+#endif
 
-static struct file_operations kmem_fops = {
+static const struct file_operations kmem_fops = {
        .llseek         = memory_lseek,
        .read           = read_kmem,
        .mmap           = mmap_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,
@@ -704,7 +708,7 @@ static struct file_operations null_fops = {
 };
 
 #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,
@@ -712,7 +716,7 @@ static struct file_operations port_fops = {
 };
 #endif
 
-static struct file_operations zero_fops = {
+static const struct file_operations zero_fops = {
        .llseek         = zero_lseek,
        .read           = read_zero,
        .write          = write_zero,
@@ -723,14 +727,14 @@ static struct backing_dev_info zero_bdi = {
        .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,
 };
@@ -757,7 +761,7 @@ static ssize_t kmsg_write(struct file * file, const char __user * buf,
        return ret;
 }
 
-static struct file_operations kmsg_fops = {
+static const struct file_operations kmsg_fops = {
        .write =        kmsg_write,
 };
 
@@ -807,7 +811,7 @@ static int memory_open(struct inode * inode, struct file * filp)
        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 */
 };
 
@@ -842,13 +846,10 @@ static int __init chr_dev_init(void)
                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;
 }