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-rw-r--r--mm/filemap.c2
-rw-r--r--mm/filemap_xip.c3
-rw-r--r--mm/fremap.c14
-rw-r--r--mm/mmap.c3
-rw-r--r--mm/nommu.c8
-rw-r--r--mm/shmem.c3
6 files changed, 21 insertions, 12 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 384344575c3..a9827b42556 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1737,6 +1737,7 @@ EXPORT_SYMBOL(filemap_page_mkwrite);
const struct vm_operations_struct generic_file_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = filemap_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
/* This is used for a general mmap of a disk file */
@@ -1749,7 +1750,6 @@ int generic_file_mmap(struct file * file, struct vm_area_struct * vma)
return -ENOEXEC;
file_accessed(file);
vma->vm_ops = &generic_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 13e013b1270..91750227a19 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -305,6 +305,7 @@ out:
static const struct vm_operations_struct xip_file_vm_ops = {
.fault = xip_file_fault,
.page_mkwrite = filemap_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
};
int xip_file_mmap(struct file * file, struct vm_area_struct * vma)
@@ -313,7 +314,7 @@ int xip_file_mmap(struct file * file, struct vm_area_struct * vma)
file_accessed(file);
vma->vm_ops = &xip_file_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR | VM_MIXEDMAP;
+ vma->vm_flags |= VM_MIXEDMAP;
return 0;
}
EXPORT_SYMBOL_GPL(xip_file_mmap);
diff --git a/mm/fremap.c b/mm/fremap.c
index 048659c0c03..3d731a49878 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -5,6 +5,7 @@
*
* started by Ingo Molnar, Copyright (C) 2002, 2003
*/
+#include <linux/export.h>
#include <linux/backing-dev.h>
#include <linux/mm.h>
#include <linux/swap.h>
@@ -80,9 +81,10 @@ out:
return err;
}
-static int populate_range(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long addr, unsigned long size, pgoff_t pgoff)
+int generic_file_remap_pages(struct vm_area_struct *vma, unsigned long addr,
+ unsigned long size, pgoff_t pgoff)
{
+ struct mm_struct *mm = vma->vm_mm;
int err;
do {
@@ -95,9 +97,9 @@ static int populate_range(struct mm_struct *mm, struct vm_area_struct *vma,
pgoff++;
} while (size);
- return 0;
-
+ return 0;
}
+EXPORT_SYMBOL(generic_file_remap_pages);
/**
* sys_remap_file_pages - remap arbitrary pages of an existing VM_SHARED vma
@@ -167,7 +169,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
if (vma->vm_private_data && !(vma->vm_flags & VM_NONLINEAR))
goto out;
- if (!(vma->vm_flags & VM_CAN_NONLINEAR))
+ if (!vma->vm_ops->remap_pages)
goto out;
if (start < vma->vm_start || start + size > vma->vm_end)
@@ -228,7 +230,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
}
mmu_notifier_invalidate_range_start(mm, start, start + size);
- err = populate_range(mm, vma, start, size, pgoff);
+ err = vma->vm_ops->remap_pages(vma, start, size, pgoff);
mmu_notifier_invalidate_range_end(mm, start, start + size);
if (!err && !(flags & MAP_NONBLOCK)) {
if (vma->vm_flags & VM_LOCKED) {
diff --git a/mm/mmap.c b/mm/mmap.c
index b0989f4d4f0..d0686d35511 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -669,8 +669,7 @@ again: remove_next = 1 + (end > next->vm_end);
static inline int is_mergeable_vma(struct vm_area_struct *vma,
struct file *file, unsigned long vm_flags)
{
- /* VM_CAN_NONLINEAR may get set later by f_op->mmap() */
- if ((vma->vm_flags ^ vm_flags) & ~VM_CAN_NONLINEAR)
+ if (vma->vm_flags ^ vm_flags)
return 0;
if (vma->vm_file != file)
return 0;
diff --git a/mm/nommu.c b/mm/nommu.c
index dee2ff89fd5..98318dcff74 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1961,6 +1961,14 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
}
EXPORT_SYMBOL(filemap_fault);
+int generic_file_remap_pages(struct vm_area_struct *vma, unsigned long addr,
+ unsigned long size, pgoff_t pgoff)
+{
+ BUG();
+ return 0;
+}
+EXPORT_SYMBOL(generic_file_remap_pages);
+
static int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm,
unsigned long addr, void *buf, int len, int write)
{
diff --git a/mm/shmem.c b/mm/shmem.c
index d3752110c8c..cc12072f878 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1339,7 +1339,6 @@ static int shmem_mmap(struct file *file, struct vm_area_struct *vma)
{
file_accessed(file);
vma->vm_ops = &shmem_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}
@@ -2643,6 +2642,7 @@ static const struct vm_operations_struct shmem_vm_ops = {
.set_policy = shmem_set_policy,
.get_policy = shmem_get_policy,
#endif
+ .remap_pages = generic_file_remap_pages,
};
static struct dentry *shmem_mount(struct file_system_type *fs_type,
@@ -2836,7 +2836,6 @@ int shmem_zero_setup(struct vm_area_struct *vma)
fput(vma->vm_file);
vma->vm_file = file;
vma->vm_ops = &shmem_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
return 0;
}