x86, PAT: Remove duplicate memtype reserve in devmem mmap

/dev/mem mmap code was doing memtype reserve/free for a while now.
Recently we added memtype tracking in remap_pfn_range, and /dev/mem mmap
uses it indirectly. So, we don't need seperate tracking in /dev/mem code
any more. That means another ~100 lines of code removed :-).

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <20090409212709.085210000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 27 deletions

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 3586b3b3df3f..8f05c38c2f06 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -301,33 +301,7 @@ static inline int private_mapping_ok(struct vm_area_struct *vma)
 }
 #endif
 
-void __attribute__((weak))
-map_devmem(unsigned long pfn, unsigned long len, pgprot_t prot)
-{
-        /* nothing. architectures can override. */
-}
-
-void __attribute__((weak))
-unmap_devmem(unsigned long pfn, unsigned long len, pgprot_t prot)
-{
-        /* nothing. architectures can override. */
-}
-
-static void mmap_mem_open(struct vm_area_struct *vma)
-{
-        map_devmem(vma->vm_pgoff,  vma->vm_end - vma->vm_start,
-                        vma->vm_page_prot);
-}
-
-static void mmap_mem_close(struct vm_area_struct *vma)
-{
-        unmap_devmem(vma->vm_pgoff,  vma->vm_end - vma->vm_start,
-                        vma->vm_page_prot);
-}
-
 static struct vm_operations_struct mmap_mem_ops = {
-        .open  = mmap_mem_open,
-        .close = mmap_mem_close,
 #ifdef CONFIG_HAVE_IOREMAP_PROT
         .access = generic_access_phys
 #endif
@@ -362,7 +336,6 @@ static int mmap_mem(struct file * file, struct vm_area_struct * vma)
                             vma->vm_pgoff,
                             size,
                             vma->vm_page_prot)) {
-                unmap_devmem(vma->vm_pgoff, size, vma->vm_page_prot);
                 return -EAGAIN;
         }
         return 0;