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Fix coverity defects: CID 147472

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CID 147472: Type: 'Constant' variable guards dead code

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: cao.xuewen <cao.xuewen@zte.com.cn>
Closes #5288
This commit is contained in:
cao
2016-10-21 02:24:01 +08:00
committed by Brian Behlendorf
parent 1f72394443
commit 5a6765cf8c
3 changed files with 15 additions and 4 deletions
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module/zfs/dmu.c
+7 -2
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@@ -987,6 +987,7 @@ static xuio_stats_t xuio_stats = {
atomic_add_64(&xuio_stats.stat.value.ui64, (val))
#define XUIOSTAT_BUMP(stat) XUIOSTAT_INCR(stat, 1)
#ifdef HAVE_UIO_ZEROCOPY
int
dmu_xuio_init(xuio_t *xuio, int nblk)
{
@@ -1071,6 +1072,7 @@ dmu_xuio_clear(xuio_t *xuio, int i)
ASSERT(i < priv->cnt);
priv->bufs[i] = NULL;
}
#endif /* HAVE_UIO_ZEROCOPY */
static void
xuio_stat_init(void)
@@ -1111,7 +1113,9 @@ dmu_read_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size)
{
dmu_buf_t **dbp;
int numbufs, i, err;
#ifdef HAVE_UIO_ZEROCOPY
xuio_t *xuio = NULL;
#endif
/*
* NB: we could do this block-at-a-time, but it's nice
@@ -1132,6 +1136,7 @@ dmu_read_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size)
bufoff = uio->uio_loffset - db->db_offset;
tocpy = MIN(db->db_size - bufoff, size);
#ifdef HAVE_UIO_ZEROCOPY
if (xuio) {
dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db;
arc_buf_t *dbuf_abuf = dbi->db_buf;
@@ -1146,10 +1151,10 @@ dmu_read_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size)
XUIOSTAT_BUMP(xuiostat_rbuf_nocopy);
else
XUIOSTAT_BUMP(xuiostat_rbuf_copied);
} else {
} else
#endif
err = uiomove((char *)db->db_data + bufoff, tocpy,
UIO_READ, uio);
}
if (err)
break;