Andrew,
this replaces
mm-move-mremap-from-file_operations-to-vm_operations_struct-fix.patch
in -mm tree nacked by Benjamin.
fs/aio.c can't be compiled if CONFIG_MMU=n, filemap_page_mkwrite() is
not defined in this case. Add ifdef(CONFIG_MMU) into aio_ring_vm_ops.
Note that this only fixes the build error, currently aio doesn't work
if !CONFIG_MMU anyway.
Reported-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
---
fs/aio.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/fs/aio.c b/fs/aio.c
index c122624..822c199 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -338,9 +338,11 @@ static int aio_ring_mremap(struct vm_area_struct *vma)
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)
--
1.7.1
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