# include <linux/efi.h>
#endif
-#if defined(CONFIG_S390_TAPE) && defined(CONFIG_S390_TAPE_CHAR)
-extern void tapechar_init(void);
-#endif
-
/*
* Architectures vary in how they handle caching for addresses
* outside of main memory.
return 1;
}
+
+static inline int valid_mmap_phys_addr_range(unsigned long addr, size_t *size)
+{
+ return 1;
+}
#endif
/*
return written;
}
+#ifndef __HAVE_PHYS_MEM_ACCESS_PROT
+static pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
+ unsigned long size, pgprot_t vma_prot)
+{
+#ifdef pgprot_noncached
+ unsigned long offset = pfn << PAGE_SHIFT;
+
+ if (uncached_access(file, offset))
+ return pgprot_noncached(vma_prot);
+#endif
+ return vma_prot;
+}
+#endif
+
static int mmap_mem(struct file * file, struct vm_area_struct * vma)
{
-#if defined(__HAVE_PHYS_MEM_ACCESS_PROT)
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ size_t size = vma->vm_end - vma->vm_start;
- vma->vm_page_prot = phys_mem_access_prot(file, offset,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot);
-#elif defined(pgprot_noncached)
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- int uncached;
+ if (!valid_mmap_phys_addr_range(vma->vm_pgoff << PAGE_SHIFT, &size))
+ return -EINVAL;
- uncached = uncached_access(file, offset);
- if (uncached)
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-#endif
+ vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
+ size,
+ vma->vm_page_prot);
/* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */
if (remap_pfn_range(vma,
vma->vm_start,
vma->vm_pgoff,
- vma->vm_end-vma->vm_start,
+ size,
vma->vm_page_prot))
return -EAGAIN;
return 0;
{
loff_t ret;
- down(&file->f_dentry->d_inode->i_sem);
+ mutex_lock(&file->f_dentry->d_inode->i_mutex);
switch (orig) {
case 0:
file->f_pos = offset;
default:
ret = -EINVAL;
}
- up(&file->f_dentry->d_inode->i_sem);
+ mutex_unlock(&file->f_dentry->d_inode->i_mutex);
return ret;
}
size_t count, loff_t *ppos)
{
char *tmp;
- int ret;
+ ssize_t ret;
tmp = kmalloc(count + 1, GFP_KERNEL);
if (tmp == NULL)
if (!copy_from_user(tmp, buf, count)) {
tmp[count] = 0;
ret = printk("%s", tmp);
+ if (ret > count)
+ /* printk can add a prefix */
+ ret = count;
}
kfree(tmp);
return ret;
mem_class = class_create(THIS_MODULE, "mem");
for (i = 0; i < ARRAY_SIZE(devlist); i++) {
- class_device_create(mem_class, MKDEV(MEM_MAJOR, devlist[i].minor),
+ 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);