mm: kill vma flag VM_CAN_NONLINEAR
Move actual pte filling for non-linear file mappings into the new special
vma operation: ->remap_pages().
Filesystems must implement this method to get non-linear mapping support,
if it uses filemap_fault() then generic_file_remap_pages() can be used.
Now device drivers can implement this method and obtain nonlinear vma support.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com> #arch/tile
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index dd6f7ee..c2483e9 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -738,6 +738,7 @@
static const struct vm_operations_struct v9fs_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = v9fs_vm_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 5caf285..f6b40e8 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1599,6 +1599,7 @@
static const struct vm_operations_struct btrfs_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = btrfs_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
static int btrfs_file_mmap(struct file *filp, struct vm_area_struct *vma)
@@ -1610,7 +1611,6 @@
file_accessed(filp);
vma->vm_ops = &btrfs_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 22b6e45..6690269 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1224,6 +1224,7 @@
static struct vm_operations_struct ceph_vmops = {
.fault = filemap_fault,
.page_mkwrite = ceph_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
int ceph_mmap(struct file *file, struct vm_area_struct *vma)
@@ -1234,6 +1235,5 @@
return -ENOEXEC;
file_accessed(file);
vma->vm_ops = &ceph_vmops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 7d7bbdc..edb25b4 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -3003,6 +3003,7 @@
static struct vm_operations_struct cifs_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = cifs_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index ca6f07a..bf3966b 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -207,6 +207,7 @@
static const struct vm_operations_struct ext4_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = ext4_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
@@ -217,7 +218,6 @@
return -ENOEXEC;
file_accessed(file);
vma->vm_ops = &ext4_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index aba15f1..78d2837 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1379,6 +1379,7 @@
.close = fuse_vma_close,
.fault = filemap_fault,
.page_mkwrite = fuse_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 30e2199..0def050 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -492,6 +492,7 @@
static const struct vm_operations_struct gfs2_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = gfs2_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
/**
@@ -526,7 +527,6 @@
return error;
}
vma->vm_ops = &gfs2_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 6a7fcab..f692be9 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -578,6 +578,7 @@
static const struct vm_operations_struct nfs_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = nfs_vm_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
static int nfs_need_sync_write(struct file *filp, struct inode *inode)
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 5b387a4..16f35f7 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -135,13 +135,13 @@
static const struct vm_operations_struct nilfs_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = nilfs_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
static int nilfs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
file_accessed(file);
vma->vm_ops = &nilfs_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index d150372..47a87dd 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -173,6 +173,7 @@
static const struct vm_operations_struct ocfs2_file_vm_ops = {
.fault = ocfs2_fault,
.page_mkwrite = ocfs2_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
int ocfs2_mmap(struct file *file, struct vm_area_struct *vma)
@@ -188,7 +189,6 @@
ocfs2_inode_unlock(file->f_dentry->d_inode, lock_level);
out:
vma->vm_ops = &ocfs2_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index ff48c5a..5bc7781 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1536,6 +1536,7 @@
static const struct vm_operations_struct ubifs_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = ubifs_vm_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 1eaeb8b..aa473fa 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -940,7 +940,6 @@
struct vm_area_struct *vma)
{
vma->vm_ops = &xfs_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
file_accessed(filp);
return 0;
@@ -1443,4 +1442,5 @@
static const struct vm_operations_struct xfs_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = xfs_vm_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};