Merge ../bleed-2.6

[pandora-kernel.git] / drivers / char / mem.c

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 4218738..38be4b0 100644 (file)
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -35,10 +35,6 @@
 # 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.
@@ -261,7 +257,11 @@ static int mmap_mem(struct file * file, struct vm_area_struct * vma)
 
 static int mmap_kmem(struct file * file, struct vm_area_struct * vma)
 {
-        unsigned long long val;
+       unsigned long pfn;
+
+       /* 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
         * than available in mem_map which pfn_valid checks
@@ -269,10 +269,10 @@ static int mmap_kmem(struct file * file, struct vm_area_struct * vma)
         *
         * RED-PEN: vmalloc is not supported right now.
         */
-       if (!pfn_valid(vma->vm_pgoff))
+       if (!pfn_valid(pfn))
                return -EIO;
-       val = (u64)vma->vm_pgoff << PAGE_SHIFT;
-       vma->vm_pgoff = __pa(val) >> PAGE_SHIFT;
+
+       vma->vm_pgoff = pfn;
        return mmap_mem(file, vma);
 }
 
@@ -920,7 +920,8 @@ static int __init chr_dev_init(void)
 
        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);