Make /dev/port conditional on config symbol

[linux-2.6-omap-h63xx.git] / drivers / char / mem.c

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index e67eef4867ba02c8af26652b811b290057bf959e..cc9a9d0df979f5dcf69b4e70d4f7945aae68a490 100644 (file)
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -18,7 +18,6 @@
 #include <linux/raw.h>
 #include <linux/tty.h>
 #include <linux/capability.h>
-#include <linux/smp_lock.h>
 #include <linux/ptrace.h>
 #include <linux/device.h>
 #include <linux/highmem.h>
@@ -248,7 +247,7 @@ static unsigned long get_unmapped_area_mem(struct file *file,
 {
        if (!valid_mmap_phys_addr_range(pgoff, len))
                return (unsigned long) -EINVAL;
-       return pgoff;
+       return pgoff << PAGE_SHIFT;
 }
 
 /* can't do an in-place private mapping if there's no MMU */
@@ -293,8 +292,8 @@ static int mmap_kmem(struct file * file, struct vm_area_struct * vma)
 {
        unsigned long pfn;
 
-       /* Turn a pfn offset into an absolute pfn */
-       pfn = PFN_DOWN(virt_to_phys((void *)PAGE_OFFSET)) + vma->vm_pgoff;
+       /* Turn a kernel-virtual address into a physical page frame */
+       pfn = __pa((u64)vma->vm_pgoff << PAGE_SHIFT) >> PAGE_SHIFT;
 
        /*
         * RED-PEN: on some architectures there is more mapped memory
@@ -552,7 +551,7 @@ static ssize_t write_kmem(struct file * file, const char __user * buf,
        return virtr + wrote;
 }
 
-#if (defined(CONFIG_ISA) || defined(CONFIG_PCI)) && !defined(__mc68000__)
+#ifdef CONFIG_DEVPORT
 static ssize_t read_port(struct file * file, char __user * buf,
                         size_t count, loff_t *ppos)
 {
@@ -646,7 +645,8 @@ static inline size_t read_zero_pagealigned(char __user * buf, size_t size)
                        count = size;
 
                zap_page_range(vma, addr, count, NULL);
-               zeromap_page_range(vma, addr, count, PAGE_COPY);
+               if (zeromap_page_range(vma, addr, count, PAGE_COPY))
+                       break;
 
                size -= count;
                buf += count;
@@ -713,11 +713,14 @@ out:
 
 static int mmap_zero(struct file * file, struct vm_area_struct * vma)
 {
+       int err;
+
        if (vma->vm_flags & VM_SHARED)
                return shmem_zero_setup(vma);
-       if (zeromap_page_range(vma, vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot))
-               return -EAGAIN;
-       return 0;
+       err = zeromap_page_range(vma, vma->vm_start,
+                       vma->vm_end - vma->vm_start, vma->vm_page_prot);
+       BUG_ON(err == -EEXIST);
+       return err;
 }
 #else /* CONFIG_MMU */
 static ssize_t read_zero(struct file * file, char * buf, 
@@ -774,7 +777,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig)
 {
        loff_t ret;
 
-       mutex_lock(&file->f_dentry->d_inode->i_mutex);
+       mutex_lock(&file->f_path.dentry->d_inode->i_mutex);
        switch (orig) {
                case 0:
                        file->f_pos = offset;
@@ -789,7 +792,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig)
                default:
                        ret = -EINVAL;
        }
-       mutex_unlock(&file->f_dentry->d_inode->i_mutex);
+       mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
        return ret;
 }
 
@@ -831,7 +834,7 @@ static const struct file_operations null_fops = {
        .splice_write   = splice_write_null,
 };
 
-#if (defined(CONFIG_ISA) || defined(CONFIG_PCI)) && !defined(__mc68000__)
+#ifdef CONFIG_DEVPORT
 static const struct file_operations port_fops = {
        .llseek         = memory_lseek,
        .read           = read_port,
@@ -909,7 +912,7 @@ static int memory_open(struct inode * inode, struct file * filp)
                case 3:
                        filp->f_op = &null_fops;
                        break;
-#if (defined(CONFIG_ISA) || defined(CONFIG_PCI)) && !defined(__mc68000__)
+#ifdef CONFIG_DEVPORT
                case 4:
                        filp->f_op = &port_fops;
                        break;
@@ -956,7 +959,7 @@ 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(CONFIG_PCI)) && !defined(__mc68000__)
+#ifdef CONFIG_DEVPORT
        {4, "port",    S_IRUSR | S_IWUSR | S_IRGRP, &port_fops},
 #endif
        {5, "zero",    S_IRUGO | S_IWUGO,           &zero_fops},