Merge ../linux-2.6-watchdog-mm

[linux-drm-fsl-dcu.git] / drivers / char / mem.c

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 4ac70ec697f07f7b6b15c52d231709b7dd64577b..55473371b7c6934abe8486af6fc3055701187140 100644 (file)
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -26,6 +26,7 @@
 #include <linux/backing-dev.h>
 #include <linux/bootmem.h>
 #include <linux/pipe_fs_i.h>
+#include <linux/pfn.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -292,8 +293,8 @@ static int mmap_kmem(struct file * file, struct vm_area_struct * vma)
 {
        unsigned long pfn;
 
-       /* Turn a kernel-virtual address into a physical page frame */
-       pfn = __pa((u64)vma->vm_pgoff << PAGE_SHIFT) >> PAGE_SHIFT;
+       /* Turn a pfn offset into an absolute pfn */
+       pfn = PFN_DOWN(virt_to_phys((void *)PAGE_OFFSET)) + vma->vm_pgoff;
 
        /*
         * RED-PEN: on some architectures there is more mapped memory
@@ -551,7 +552,7 @@ static ssize_t write_kmem(struct file * file, const char __user * buf,
        return virtr + wrote;
 }
 
-#if defined(CONFIG_ISA) || !defined(__mc68000__)
+#if (defined(CONFIG_ISA) || defined(CONFIG_PCI)) && !defined(__mc68000__)
 static ssize_t read_port(struct file * file, char __user * buf,
                         size_t count, loff_t *ppos)
 {
@@ -830,7 +831,7 @@ static const struct file_operations null_fops = {
        .splice_write   = splice_write_null,
 };
 
-#if defined(CONFIG_ISA) || !defined(__mc68000__)
+#if (defined(CONFIG_ISA) || defined(CONFIG_PCI)) && !defined(__mc68000__)
 static const struct file_operations port_fops = {
        .llseek         = memory_lseek,
        .read           = read_port,
@@ -908,7 +909,7 @@ static int memory_open(struct inode * inode, struct file * filp)
                case 3:
                        filp->f_op = &null_fops;
                        break;
-#if defined(CONFIG_ISA) || !defined(__mc68000__)
+#if (defined(CONFIG_ISA) || defined(CONFIG_PCI)) && !defined(__mc68000__)
                case 4:
                        filp->f_op = &port_fops;
                        break;
@@ -955,7 +956,7 @@ static const struct {
        {1, "mem",     S_IRUSR | S_IWUSR | S_IRGRP, &mem_fops},
        {2, "kmem",    S_IRUSR | S_IWUSR | S_IRGRP, &kmem_fops},
        {3, "null",    S_IRUGO | S_IWUGO,           &null_fops},
-#if defined(CONFIG_ISA) || !defined(__mc68000__)
+#if (defined(CONFIG_ISA) || defined(CONFIG_PCI)) && !defined(__mc68000__)
        {4, "port",    S_IRUSR | S_IWUSR | S_IRGRP, &port_fops},
 #endif
        {5, "zero",    S_IRUGO | S_IWUGO,           &zero_fops},