Commit 5477e70a authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Linus Torvalds

mm: move ->mremap() from file_operations to vm_operations_struct

vma->vm_ops->mremap() looks more natural and clean in move_vma(), and this
way ->mremap() can have more users.  Say, vdso.

While at it, s/aio_ring_remap/aio_ring_mremap/.

Note: this is the minimal change before ->mremap() finds another user in
file_operations; this method should have more arguments, and it can be
used to kill arch_remap().
Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
Acked-by: default avatarPavel Emelyanov <xemul@parallels.com>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent df1eab30
...@@ -308,15 +308,9 @@ static void aio_free_ring(struct kioctx *ctx) ...@@ -308,15 +308,9 @@ static void aio_free_ring(struct kioctx *ctx)
} }
} }
static int aio_ring_mmap(struct file *file, struct vm_area_struct *vma) static int aio_ring_mremap(struct vm_area_struct *vma)
{
vma->vm_flags |= VM_DONTEXPAND;
vma->vm_ops = &generic_file_vm_ops;
return 0;
}
static int aio_ring_remap(struct file *file, struct vm_area_struct *vma)
{ {
struct file *file = vma->vm_file;
struct mm_struct *mm = vma->vm_mm; struct mm_struct *mm = vma->vm_mm;
struct kioctx_table *table; struct kioctx_table *table;
int i, res = -EINVAL; int i, res = -EINVAL;
...@@ -342,9 +336,24 @@ static int aio_ring_remap(struct file *file, struct vm_area_struct *vma) ...@@ -342,9 +336,24 @@ static int aio_ring_remap(struct file *file, struct vm_area_struct *vma)
return res; return res;
} }
static const struct vm_operations_struct aio_ring_vm_ops = {
.mremap = aio_ring_mremap,
#if IS_ENABLED(CONFIG_MMU)
.fault = filemap_fault,
.map_pages = filemap_map_pages,
.page_mkwrite = filemap_page_mkwrite,
#endif
};
static int aio_ring_mmap(struct file *file, struct vm_area_struct *vma)
{
vma->vm_flags |= VM_DONTEXPAND;
vma->vm_ops = &aio_ring_vm_ops;
return 0;
}
static const struct file_operations aio_ring_fops = { static const struct file_operations aio_ring_fops = {
.mmap = aio_ring_mmap, .mmap = aio_ring_mmap,
.mremap = aio_ring_remap,
}; };
#if IS_ENABLED(CONFIG_MIGRATION) #if IS_ENABLED(CONFIG_MIGRATION)
......
...@@ -1612,7 +1612,6 @@ struct file_operations { ...@@ -1612,7 +1612,6 @@ struct file_operations {
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long); long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long); long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *); int (*mmap) (struct file *, struct vm_area_struct *);
int (*mremap)(struct file *, struct vm_area_struct *);
int (*open) (struct inode *, struct file *); int (*open) (struct inode *, struct file *);
int (*flush) (struct file *, fl_owner_t id); int (*flush) (struct file *, fl_owner_t id);
int (*release) (struct inode *, struct file *); int (*release) (struct inode *, struct file *);
......
...@@ -247,6 +247,7 @@ struct vm_fault { ...@@ -247,6 +247,7 @@ struct vm_fault {
struct vm_operations_struct { struct vm_operations_struct {
void (*open)(struct vm_area_struct * area); void (*open)(struct vm_area_struct * area);
void (*close)(struct vm_area_struct * area); void (*close)(struct vm_area_struct * area);
int (*mremap)(struct vm_area_struct * area);
int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf); int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf);
void (*map_pages)(struct vm_area_struct *vma, struct vm_fault *vmf); void (*map_pages)(struct vm_area_struct *vma, struct vm_fault *vmf);
......
...@@ -277,8 +277,8 @@ static unsigned long move_vma(struct vm_area_struct *vma, ...@@ -277,8 +277,8 @@ static unsigned long move_vma(struct vm_area_struct *vma,
need_rmap_locks); need_rmap_locks);
if (moved_len < old_len) { if (moved_len < old_len) {
err = -ENOMEM; err = -ENOMEM;
} else if (vma->vm_file && vma->vm_file->f_op->mremap) { } else if (vma->vm_ops && vma->vm_ops->mremap) {
err = vma->vm_file->f_op->mremap(vma->vm_file, new_vma); err = vma->vm_ops->mremap(new_vma);
} }
if (unlikely(err)) { if (unlikely(err)) {
......
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