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Remove UIO_ZEROCOPY functions structures

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The original xuio zero copy functionality has always been unused 
on Linux and FreeBSD.  Remove this disabled code to avoid any
confusion and improve readability.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #11124
This commit is contained in:
Matthew Macy
2020-10-30 10:00:33 -07:00
committed by GitHub
parent 1199c3e8fb
commit 5fa356ea44
9 changed files with 0 additions and 454 deletions
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include/sys/dmu.h
-12
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@@ -864,18 +864,6 @@ int dmu_assign_arcbuf_by_dnode(dnode_t *dn, uint64_t offset,
int dmu_assign_arcbuf_by_dbuf(dmu_buf_t *handle, uint64_t offset,
struct arc_buf *buf, dmu_tx_t *tx);
#define dmu_assign_arcbuf dmu_assign_arcbuf_by_dbuf
#ifdef HAVE_UIO_ZEROCOPY
int dmu_xuio_init(struct xuio *uio, int niov);
void dmu_xuio_fini(struct xuio *uio);
int dmu_xuio_add(struct xuio *uio, struct arc_buf *abuf, offset_t off,
size_t n);
int dmu_xuio_cnt(struct xuio *uio);
struct arc_buf *dmu_xuio_arcbuf(struct xuio *uio, int i);
void dmu_xuio_clear(struct xuio *uio, int i);
#endif /* HAVE_UIO_ZEROCOPY */
void xuio_stat_wbuf_copied(void);
void xuio_stat_wbuf_nocopy(void);
extern int zfs_prefetch_disable;
extern int zfs_max_recordsize;