[PATCH] mm: remove VM_LOCKED before remap_pfn_range and drop VM_SHM

Remove VM_LOCKED before remap_pfn range from device drivers and get rid of
VM_SHM.

remap_pfn_range() already sets VM_IO.  There is no need to set VM_SHM since
it does nothing.  VM_LOCKED is of no use since the remap_pfn_range does not
place pages on the LRU.  The pages are therefore never subject to swap
anyways.  Remove all the vm_flags settings before calling remap_pfn_range.

After removing all the vm_flag settings no use of VM_SHM is left.  Drop it.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 0 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index c858eb4bef17..b5431ccf1147 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -1654,7 +1654,6 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
                 return -EINVAL;
 
         vma->vm_pgoff = offset >> PAGE_SHIFT;
-        vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
         vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
                                                   vma->vm_page_prot,
                                                   mmap_state, write_combine);
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 5ad87c426bed..247937dd8b73 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -877,7 +877,6 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
                 return -EINVAL;
 
         vma->vm_pgoff = offset >> PAGE_SHIFT;
-        vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
         vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
                                                   vma->vm_page_prot,
                                                   mmap_state, write_combine);
diff --git a/arch/powerpc/kernel/proc_ppc64.c b/arch/powerpc/kernel/proc_ppc64.c
index 2b87f82df135..2ab8f2be911e 100644
--- a/arch/powerpc/kernel/proc_ppc64.c
+++ b/arch/powerpc/kernel/proc_ppc64.c
@@ -115,8 +115,6 @@ static int page_map_mmap( struct file *file, struct vm_area_struct *vma )
 {
         struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
 
-        vma->vm_flags |= VM_SHM | VM_LOCKED;
-
         if ((vma->vm_end - vma->vm_start) > dp->size)
                 return -EINVAL;