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Linux 4.20 compat: wrapper function for iov_iter type access 

An iov_iter_type() function to access the "type" member of the struct
iov_iter was added at one point. Move the conditional logic to decide
which method to use for accessing it into a macro and simplify the
zpl_uio_init code.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #15100
This commit is contained in:
Coleman Kane 2023-07-30 15:23:47 -04:00 committed by Brian Behlendorf
parent 325505e5c4
commit 6751634d77
2 changed files with 8 additions and 5 deletions
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6
include/os/linux/spl/sys/uio.h
View File

@ -179,4 +179,10 @@ zfs_uio_iov_iter_init(zfs_uio_t *uio, struct iov_iter *iter, offset_t offset,
#define zfs_uio_iter_iov(iter) (iter)->iov
#endif
#if defined(HAVE_IOV_ITER_TYPE)
#define zfs_uio_iov_iter_type(iter) iov_iter_type((iter))
#else
#define zfs_uio_iov_iter_type(iter) (iter)->type
#endif
#endif /* SPL_UIO_H */

7
module/os/linux/zfs/zpl_file.c
View File

@ -300,13 +300,10 @@ zpl_uio_init(zfs_uio_t *uio, struct kiocb *kiocb, struct iov_iter *to,
{
#if defined(HAVE_VFS_IOV_ITER)
zfs_uio_iov_iter_init(uio, to, pos, count, skip);
#elif defined(HAVE_IOV_ITER_TYPE)
zfs_uio_iovec_init(uio, zfs_uio_iter_iov(to), to->nr_segs, pos,
iov_iter_type(to) & ITER_KVEC ? UIO_SYSSPACE : UIO_USERSPACE,
count, skip);
#else
zfs_uio_iovec_init(uio, zfs_uio_iter_iov(to), to->nr_segs, pos,
to->type & ITER_KVEC ? UIO_SYSSPACE : UIO_USERSPACE,
zfs_uio_iov_iter_type(to) & ITER_KVEC ?
UIO_SYSSPACE : UIO_USERSPACE,
count, skip);
#endif
}