start adding the tag to iov_iter
For now, just use the same thing we pass to ->direct_IO() - it's all
iovec-based at the moment. Pass it explicitly to iov_iter_init() and
account for kvec vs. iovec in there, by the same kludge NFS ->direct_IO()
uses.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/mm/filemap.c b/mm/filemap.c
index a7f79e9..3aeaf2d 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1730,7 +1730,7 @@
size_t count = iov_length(iov, nr_segs);
struct iov_iter i;
- iov_iter_init(&i, iov, nr_segs, count, 0);
+ iov_iter_init(&i, READ, iov, nr_segs, count);
return generic_file_read_iter(iocb, &i);
}
EXPORT_SYMBOL(generic_file_aio_read);
@@ -2596,7 +2596,7 @@
if (err)
goto out;
- iov_iter_init(&from, iov, nr_segs, count, 0);
+ iov_iter_init(&from, WRITE, iov, nr_segs, count);
/* coalesce the iovecs and go direct-to-BIO for O_DIRECT */
if (unlikely(file->f_flags & O_DIRECT)) {
diff --git a/mm/iov_iter.c b/mm/iov_iter.c
index 2f762cc..e2c9a2d 100644
--- a/mm/iov_iter.c
+++ b/mm/iov_iter.c
@@ -220,3 +220,18 @@
return res;
}
EXPORT_SYMBOL(iov_iter_alignment);
+
+void iov_iter_init(struct iov_iter *i, int direction,
+ const struct iovec *iov, unsigned long nr_segs,
+ size_t count)
+{
+ /* It will get better. Eventually... */
+ if (segment_eq(get_fs(), KERNEL_DS))
+ direction |= REQ_KERNEL;
+ i->type = direction;
+ i->iov = iov;
+ i->nr_segs = nr_segs;
+ i->iov_offset = 0;
+ i->count = count;
+}
+EXPORT_SYMBOL(iov_iter_init);
diff --git a/mm/page_io.c b/mm/page_io.c
index 0ed0644..313bfed 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -268,7 +268,7 @@
init_sync_kiocb(&kiocb, swap_file);
kiocb.ki_pos = page_file_offset(page);
kiocb.ki_nbytes = PAGE_SIZE;
- iov_iter_init(&from, &iov, 1, PAGE_SIZE, 0);
+ iov_iter_init(&from, KERNEL_WRITE, &iov, 1, PAGE_SIZE);
set_page_writeback(page);
unlock_page(page);
diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c
index f32b1fb..5077afc 100644
--- a/mm/process_vm_access.c
+++ b/mm/process_vm_access.c
@@ -274,7 +274,7 @@
if (rc <= 0)
goto free_iovecs;
- iov_iter_init(&iter, iov_l, liovcnt, rc, 0);
+ iov_iter_init(&iter, vm_write ? WRITE : READ, iov_l, liovcnt, rc);
rc = rw_copy_check_uvector(CHECK_IOVEC_ONLY, rvec, riovcnt, UIO_FASTIOV,
iovstack_r, &iov_r);
@@ -337,7 +337,7 @@
&iov_l);
if (rc <= 0)
goto free_iovecs;
- iov_iter_init(&iter, iov_l, liovcnt, rc, 0);
+ iov_iter_init(&iter, vm_write ? WRITE : READ, iov_l, liovcnt, rc);
rc = compat_rw_copy_check_uvector(CHECK_IOVEC_ONLY, rvec, riovcnt,
UIO_FASTIOV, iovstack_r,
&iov_r);
diff --git a/mm/shmem.c b/mm/shmem.c
index 2a93e62..e0b7669 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1417,7 +1417,7 @@
loff_t *ppos = &iocb->ki_pos;
struct iov_iter iter;
- iov_iter_init(&iter, iov, nr_segs, count, 0);
+ iov_iter_init(&iter, READ, iov, nr_segs, count);
/*
* Might this read be for a stacking filesystem? Then when reading