Fix gcc cast warnings

Gcc -Wall warn: 'lacks a cast'
Gcc -Wall warn: 'comparison between pointer and integer'

Signed-off-by: Brian Behlendorf <[email protected]>

16 files changed, 90 insertions, 77 deletions

diff --git a/cmd/zdb/zdb.c b/cmd/zdb/zdb.c
index 45b27b0a4..891cb9c20 100644
--- a/cmd/zdb/zdb.c
+++ b/cmd/zdb/zdb.c
@@ -874,8 +874,8 @@ dump_history(spa_t *spa)
 			(void) snprintf(internalstr,
 			    sizeof (internalstr),
 			    "[internal %s txg:%lld] %s",
-			    zfs_history_event_names[ievent], txg,
-			    intstr);
+			    zfs_history_event_names[ievent],
+			    (longlong_t)txg, intstr);
 			cmd = internalstr;
 		}
 		tsec = time;
diff --git a/cmd/zfs/zfs_main.c b/cmd/zfs/zfs_main.c
index f694ee18f..5be1263e9 100644
--- a/cmd/zfs/zfs_main.c
+++ b/cmd/zfs/zfs_main.c
@@ -1682,7 +1682,7 @@ upgrade_set_callback(zfs_handle_t *zhp, void *data)
 	if (version < cb->cb_version) {
 		char verstr[16];
 		(void) snprintf(verstr, sizeof (verstr),
-		    "%llu", cb->cb_version);
+		    "%llu", (u_longlong_t)cb->cb_version);
 		if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
 			/*
 			 * If they did "zfs upgrade -a", then we could
@@ -1720,7 +1720,7 @@ zfs_do_upgrade(int argc, char **argv)
 	boolean_t showversions = B_FALSE;
 	int ret;
 	upgrade_cbdata_t cb = { 0 };
-	char c;
+	signed char c;
 	int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
 
 	/* check options */
@@ -1789,11 +1789,11 @@ zfs_do_upgrade(int argc, char **argv)
 		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
 		    NULL, NULL, 0, upgrade_set_callback, &cb);
 		(void) printf(gettext("%llu filesystems upgraded\n"),
-		    cb.cb_numupgraded);
+		    (u_longlong_t)cb.cb_numupgraded);
 		if (cb.cb_numsamegraded) {
 			(void) printf(gettext("%llu filesystems already at "
 			    "this version\n"),
-			    cb.cb_numsamegraded);
+			    (u_longlong_t)cb.cb_numsamegraded);
 		}
 		if (cb.cb_numfailed != 0)
 			ret = 1;
@@ -1957,9 +1957,9 @@ print_header(zprop_list_t *pl)
 		if (pl->pl_next == NULL && !right_justify)
 			(void) printf("%s", header);
 		else if (right_justify)
-			(void) printf("%*s", pl->pl_width, header);
+			(void) printf("%*s", (int)pl->pl_width, header);
 		else
-			(void) printf("%-*s", pl->pl_width, header);
+			(void) printf("%-*s", (int)pl->pl_width, header);
 	}
 
 	(void) printf("\n");
@@ -2550,7 +2550,7 @@ zfs_do_set(int argc, char **argv)
 		usage(B_FALSE);
 	}
 
-	ret = zfs_for_each(argc - 2, argv + 2, NULL,
+	ret = zfs_for_each(argc - 2, argv + 2, 0,
 	    ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
 
 	return (ret);
@@ -2567,7 +2567,7 @@ zfs_do_snapshot(int argc, char **argv)
 {
 	boolean_t recursive = B_FALSE;
 	int ret;
-	char c;
+	signed char c;
 	nvlist_t *props;
 
 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
diff --git a/cmd/zpool/zpool_main.c b/cmd/zpool/zpool_main.c
index 8aa985b1a..4fe14c827 100644
--- a/cmd/zpool/zpool_main.c
+++ b/cmd/zpool/zpool_main.c
@@ -2438,9 +2438,9 @@ print_header(zprop_list_t *pl)
 		if (pl->pl_next == NULL && !right_justify)
 			(void) printf("%s", header);
 		else if (right_justify)
-			(void) printf("%*s", pl->pl_width, header);
+			(void) printf("%*s", (int)pl->pl_width, header);
 		else
-			(void) printf("%-*s", pl->pl_width, header);
+			(void) printf("%-*s", (int)pl->pl_width, header);
 	}
 
 	(void) printf("\n");
@@ -3906,7 +3906,7 @@ upgrade_one(zpool_handle_t *zhp, void *data)
 	if (cur_version > cbp->cb_version) {
 		(void) printf(gettext("Pool '%s' is already formatted "
 		    "using more current version '%llu'.\n"),
-		    zpool_get_name(zhp), cur_version);
+		    zpool_get_name(zhp), (u_longlong_t) cur_version);
 		return (0);
 	}
 	if (cur_version == cbp->cb_version) {
@@ -4147,8 +4147,8 @@ get_history_one(zpool_handle_t *zhp, void *data)
 				continue;
 			(void) snprintf(internalstr,
 			    sizeof (internalstr),
-			    "[internal %s txg:%lld] %s",
-			    zfs_history_event_names[ievent], txg,
+			    "[internal %s txg:%llu] %s",
+			    zfs_history_event_names[ievent], (u_longlong_t)txg,
 			    pathstr);
 			cmdstr = internalstr;
 		}
diff --git a/cmd/ztest/ztest.c b/cmd/ztest/ztest.c
index a6503f477..771f1427e 100644
--- a/cmd/ztest/ztest.c
+++ b/cmd/ztest/ztest.c
@@ -2022,7 +2022,7 @@ ztest_od_init(ztest_od_t *od, uint64_t id, char *tag, uint64_t index,
 	od->od_gen = 0;
 
 	(void) snprintf(od->od_name, sizeof (od->od_name), "%s(%lld)[%llu]",
-	    tag, (int64_t)id, index);
+	    tag, (longlong_t)id, (u_longlong_t)index);
 }
 
 /*
@@ -3042,11 +3042,16 @@ ztest_dsl_dataset_cleanup(char *osname, uint64_t id)
 	char snap3name[MAXNAMELEN];
 	int error;
 
-	(void) snprintf(snap1name, MAXNAMELEN, "%s@s1_%llu", osname, id);
-	(void) snprintf(clone1name, MAXNAMELEN, "%s/c1_%llu", osname, id);
-	(void) snprintf(snap2name, MAXNAMELEN, "%s@s2_%llu", clone1name, id);
-	(void) snprintf(clone2name, MAXNAMELEN, "%s/c2_%llu", osname, id);
-	(void) snprintf(snap3name, MAXNAMELEN, "%s@s3_%llu", clone1name, id);
+	(void) snprintf(snap1name, MAXNAMELEN, "%s@s1_%llu",
+	    osname, (u_longlong_t)id);
+	(void) snprintf(clone1name, MAXNAMELEN, "%s/c1_%llu",
+	    osname, (u_longlong_t)id);
+	(void) snprintf(snap2name, MAXNAMELEN, "%s@s2_%llu",
+	    clone1name, (u_longlong_t)id);
+	(void) snprintf(clone2name, MAXNAMELEN, "%s/c2_%llu",
+	    osname, (u_longlong_t)id);
+	(void) snprintf(snap3name, MAXNAMELEN, "%s@s3_%llu",
+	    clone1name, (u_longlong_t)id);
 
 	error = dmu_objset_destroy(clone2name, B_FALSE);
 	if (error && error != ENOENT)
@@ -3086,11 +3091,16 @@ ztest_dsl_dataset_promote_busy(ztest_ds_t *zd, uint64_t id)
 
 	ztest_dsl_dataset_cleanup(osname, id);
 
-	(void) snprintf(snap1name, MAXNAMELEN, "%s@s1_%llu", osname, id);
-	(void) snprintf(clone1name, MAXNAMELEN, "%s/c1_%llu", osname, id);
-	(void) snprintf(snap2name, MAXNAMELEN, "%s@s2_%llu", clone1name, id);
-	(void) snprintf(clone2name, MAXNAMELEN, "%s/c2_%llu", osname, id);
-	(void) snprintf(snap3name, MAXNAMELEN, "%s@s3_%llu", clone1name, id);
+	(void) snprintf(snap1name, MAXNAMELEN, "%s@s1_%llu",
+	    osname, (u_longlong_t)id);
+	(void) snprintf(clone1name, MAXNAMELEN, "%s/c1_%llu",
+	    osname, (u_longlong_t)id);
+	(void) snprintf(snap2name, MAXNAMELEN, "%s@s2_%llu",
+	    clone1name, (u_longlong_t)id);
+	(void) snprintf(clone2name, MAXNAMELEN, "%s/c2_%llu",
+	    osname, (u_longlong_t)id);
+	(void) snprintf(snap3name, MAXNAMELEN, "%s@s3_%llu",
+	    clone1name, (u_longlong_t)id);
 
 	error = dmu_objset_snapshot(osname, strchr(snap1name, '@')+1,
 	    NULL, NULL, B_FALSE, B_FALSE, -1);
@@ -3912,7 +3922,7 @@ ztest_fzap(ztest_ds_t *zd, uint64_t id)
 		int error;
 
 		(void) snprintf(name, sizeof (name), "fzap-%llu-%llu",
-		    id, value);
+		    (u_longlong_t)id, (u_longlong_t)value);
 
 		tx = dmu_tx_create(os);
 		dmu_tx_hold_zap(tx, object, B_TRUE, name);
diff --git a/lib/libnvpair/libnvpair.c b/lib/libnvpair/libnvpair.c
index 16bce483b..f669f9a89 100644
--- a/lib/libnvpair/libnvpair.c
+++ b/lib/libnvpair/libnvpair.c
@@ -210,7 +210,7 @@ NVLIST_PRTFUNC(int32, int32_t, int32_t, "%d")
 NVLIST_PRTFUNC(uint32, uint32_t, uint32_t, "0x%x")
 NVLIST_PRTFUNC(int64, int64_t, longlong_t, "%lld")
 NVLIST_PRTFUNC(uint64, uint64_t, u_longlong_t, "0x%llx")
-NVLIST_PRTFUNC(double, double, double, "0x%llf")
+NVLIST_PRTFUNC(double, double, double, "0x%f")
 NVLIST_PRTFUNC(string, char *, char *, "%s")
 NVLIST_PRTFUNC(hrtime, hrtime_t, hrtime_t, "0x%llx")
 
@@ -1216,7 +1216,7 @@ nvpair_value_match_regex(nvpair_t *nvp, int ai,
 		boolean_t val, val_arg;
 
 		/* scanf boolean_t from value and check for match */
-		sr = sscanf(value, "%"SCNi32, &val_arg);
+		sr = sscanf(value, "%"SCNi32, (int32_t *)&val_arg);
 		if ((sr == 1) &&
 		    (nvpair_value_boolean_value(nvp, &val) == 0) &&
 		    (val == val_arg))
@@ -1227,7 +1227,7 @@ nvpair_value_match_regex(nvpair_t *nvp, int ai,
 		boolean_t *val_array, val_arg;
 
 		/* check indexed value of array for match */
-		sr = sscanf(value, "%"SCNi32, &val_arg);
+		sr = sscanf(value, "%"SCNi32, (int32_t *)&val_arg);
 		if ((sr == 1) &&
 		    (nvpair_value_boolean_array(nvp,
 		    &val_array, &a_len) == 0) &&
diff --git a/lib/libzfs/libzfs_dataset.c b/lib/libzfs/libzfs_dataset.c
index b7c1360db..3d31c106d 100644
--- a/lib/libzfs/libzfs_dataset.c
+++ b/lib/libzfs/libzfs_dataset.c
@@ -1906,7 +1906,7 @@ zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
 			    localtime_r(&time, &t) == NULL ||
 			    strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
 			    &t) == 0)
-				(void) snprintf(propbuf, proplen, "%llu", val);
+				(void) snprintf(propbuf, proplen, "%llu", (u_longlong_t) val);
 		}
 		break;
 
@@ -2391,7 +2391,8 @@ zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
 		return (err);
 
 	if (literal) {
-		(void) snprintf(propbuf, proplen, "%llu", propvalue);
+		(void) snprintf(propbuf, proplen, "%llu",
+			       (u_longlong_t)propvalue);
 	} else if (propvalue == 0 &&
 	    (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
 		(void) strlcpy(propbuf, "none", proplen);
diff --git a/lib/libzfs/libzfs_diff.c b/lib/libzfs/libzfs_diff.c
index 888224f3b..4614526cb 100644
--- a/lib/libzfs/libzfs_diff.c
+++ b/lib/libzfs/libzfs_diff.c
@@ -118,7 +118,7 @@ get_stats_for_obj(differ_info_t *di, const char *dsname, uint64_t obj,
 		(void) snprintf(di->errbuf, sizeof (di->errbuf),
 		    dgettext(TEXT_DOMAIN,
 		    "Unable to determine path or stats for "
-		    "object %lld in %s"), obj, dsname);
+		    "object %lld in %s"), (longlong_t)obj, dsname);
 		return (-1);
 	}
 }
@@ -406,7 +406,7 @@ write_free_diffs(FILE *fp, differ_info_t *di, dmu_diff_record_t *dr)
 			(void) snprintf(di->errbuf, sizeof (di->errbuf),
 			    dgettext(TEXT_DOMAIN,
 			    "next allocated object (> %lld) find failure"),
-			    zc.zc_obj);
+			    (longlong_t)zc.zc_obj);
 			di->zerr = errno;
 			break;
 		}
diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c
index 7df7e910d..3cb7bbc91 100644
--- a/lib/libzfs/libzfs_pool.c
+++ b/lib/libzfs/libzfs_pool.c
@@ -228,7 +228,7 @@ zpool_get_prop(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len,
 
 		case ZPOOL_PROP_GUID:
 			intval = zpool_get_prop_int(zhp, prop, &src);
-			(void) snprintf(buf, len, "%llu", intval);
+			(void) snprintf(buf, len, "%llu", (u_longlong_t)intval);
 			break;
 
 		case ZPOOL_PROP_ALTROOT:
@@ -295,7 +295,7 @@ zpool_get_prop(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len,
 			    vs->vs_aux), len);
 			break;
 		default:
-			(void) snprintf(buf, len, "%llu", intval);
+			(void) snprintf(buf, len, "%llu", (u_longlong_t)intval);
 		}
 		break;
 
@@ -1238,7 +1238,7 @@ zpool_rewind_exclaim(libzfs_handle_t *hdl, const char *name, boolean_t dryrun,
 	(void) nvlist_lookup_int64(nv, ZPOOL_CONFIG_REWIND_TIME, &loss);
 
 	if (localtime_r((time_t *)&rewindto, &t) != NULL &&
-	    strftime(timestr, 128, 0, &t) != 0) {
+	    strftime(timestr, 128, "%c", &t) != 0) {
 		if (dryrun) {
 			(void) printf(dgettext(TEXT_DOMAIN,
 			    "Would be able to return %s "
@@ -1253,13 +1253,14 @@ zpool_rewind_exclaim(libzfs_handle_t *hdl, const char *name, boolean_t dryrun,
 			(void) printf(dgettext(TEXT_DOMAIN,
 			    "%s approximately %lld "),
 			    dryrun ? "Would discard" : "Discarded",
-			    (loss + 30) / 60);
+			    ((longlong_t)loss + 30) / 60);
 			(void) printf(dgettext(TEXT_DOMAIN,
 			    "minutes of transactions.\n"));
 		} else if (loss > 0) {
 			(void) printf(dgettext(TEXT_DOMAIN,
 			    "%s approximately %lld "),
-			    dryrun ? "Would discard" : "Discarded", loss);
+			    dryrun ? "Would discard" : "Discarded",
+			    (longlong_t)loss);
 			(void) printf(dgettext(TEXT_DOMAIN,
 			    "seconds of transactions.\n"));
 		}
@@ -1298,7 +1299,7 @@ zpool_explain_recover(libzfs_handle_t *hdl, const char *name, int reason,
 	    "Recovery is possible, but will result in some data loss.\n"));
 
 	if (localtime_r((time_t *)&rewindto, &t) != NULL &&
-	    strftime(timestr, 128, 0, &t) != 0) {
+	    strftime(timestr, 128, "%c", &t) != 0) {
 		(void) printf(dgettext(TEXT_DOMAIN,
 		    "\tReturning the pool to its state as of %s\n"
 		    "\tshould correct the problem.  "),
@@ -1312,11 +1313,13 @@ zpool_explain_recover(libzfs_handle_t *hdl, const char *name, int reason,
 	if (loss > 120) {
 		(void) printf(dgettext(TEXT_DOMAIN,
 		    "Approximately %lld minutes of data\n"
-		    "\tmust be discarded, irreversibly.  "), (loss + 30) / 60);
+		    "\tmust be discarded, irreversibly.  "),
+		    ((longlong_t)loss + 30) / 60);
 	} else if (loss > 0) {
 		(void) printf(dgettext(TEXT_DOMAIN,
 		    "Approximately %lld seconds of data\n"
-		    "\tmust be discarded, irreversibly.  "), loss);
+		    "\tmust be discarded, irreversibly.  "),
+		    (longlong_t)loss);
 	}
 	if (edata != 0 && edata != UINT64_MAX) {
 		if (edata == 1) {
@@ -2260,7 +2263,7 @@ zpool_vdev_fault(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux)
 	libzfs_handle_t *hdl = zhp->zpool_hdl;
 
 	(void) snprintf(msg, sizeof (msg),
-	    dgettext(TEXT_DOMAIN, "cannot fault %llu"), guid);
+           dgettext(TEXT_DOMAIN, "cannot fault %llu"), (u_longlong_t)guid);
 
 	(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
 	zc.zc_guid = guid;
@@ -2295,7 +2298,7 @@ zpool_vdev_degrade(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux)
 	libzfs_handle_t *hdl = zhp->zpool_hdl;
 
 	(void) snprintf(msg, sizeof (msg),
-	    dgettext(TEXT_DOMAIN, "cannot degrade %llu"), guid);
+           dgettext(TEXT_DOMAIN, "cannot degrade %llu"), (u_longlong_t)guid);
 
 	(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
 	zc.zc_guid = guid;
@@ -2954,7 +2957,7 @@ zpool_vdev_clear(zpool_handle_t *zhp, uint64_t guid)
 
 	(void) snprintf(msg, sizeof (msg),
 	    dgettext(TEXT_DOMAIN, "cannot clear errors for %llx"),
-	    guid);
+           (u_longlong_t)guid);
 
 	(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
 	zc.zc_guid = guid;
@@ -3475,7 +3478,7 @@ zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
 
 	if (dsobj == 0) {
 		/* special case for the MOS */
-		(void) snprintf(pathname, len, "<metadata>:<0x%llx>", obj);
+		(void) snprintf(pathname, len, "<metadata>:<0x%llx>", (longlong_t)obj);
 		return;
 	}
 
@@ -3486,7 +3489,7 @@ zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
 	    ZFS_IOC_DSOBJ_TO_DSNAME, &zc) != 0) {
 		/* just write out a path of two object numbers */
 		(void) snprintf(pathname, len, "<0x%llx>:<0x%llx>",
-		    dsobj, obj);
+		    (longlong_t)dsobj, (longlong_t)obj);
 		return;
 	}
 	(void) strlcpy(dsname, zc.zc_value, sizeof (dsname));
@@ -3507,7 +3510,7 @@ zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
 			    dsname, zc.zc_value);
 		}
 	} else {
-		(void) snprintf(pathname, len, "%s:<0x%llx>", dsname, obj);
+		(void) snprintf(pathname, len, "%s:<0x%llx>", dsname, (longlong_t)obj);
 	}
 	free(mntpnt);
 }
diff --git a/lib/libzfs/libzfs_sendrecv.c b/lib/libzfs/libzfs_sendrecv.c
index 3093ab974..8d6c43807 100644
--- a/lib/libzfs/libzfs_sendrecv.c
+++ b/lib/libzfs/libzfs_sendrecv.c
@@ -1571,7 +1571,7 @@ recv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname,
 
 		(void) strncpy(newname, name, baselen);
 		(void) snprintf(newname+baselen, ZFS_MAXNAMELEN-baselen,
-		    "recv-%u-%u", getpid(), seq);
+		    "recv-%ld-%u", (long) getpid(), seq);
 		(void) strlcpy(zc.zc_value, newname, sizeof (zc.zc_value));
 
 		if (flags.verbose) {
@@ -2490,7 +2490,7 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
 			(void) printf("found clone origin %s\n", zc.zc_string);
 	}
 
-	stream_wantsnewfs = (drrb->drr_fromguid == NULL ||
+	stream_wantsnewfs = (drrb->drr_fromguid == 0 ||
 	    (drrb->drr_flags & DRR_FLAG_CLONE));
 
 	if (stream_wantsnewfs) {
diff --git a/lib/libzfs/libzfs_util.c b/lib/libzfs/libzfs_util.c
index 01b7c8732..fbed42f06 100644
--- a/lib/libzfs/libzfs_util.c
+++ b/lib/libzfs/libzfs_util.c
@@ -571,13 +571,13 @@ zfs_nicenum(uint64_t num, char *buf, size_t buflen)
 	u = " KMGTPE"[index];
 
 	if (index == 0) {
-		(void) snprintf(buf, buflen, "%llu", n);
+		(void) snprintf(buf, buflen, "%llu", (u_longlong_t) n);
 	} else if ((num & ((1ULL << 10 * index) - 1)) == 0) {
 		/*
 		 * If this is an even multiple of the base, always display
 		 * without any decimal precision.
 		 */
-		(void) snprintf(buf, buflen, "%llu%c", n, u);
+		(void) snprintf(buf, buflen, "%llu%c", (u_longlong_t) n, u);
 	} else {
 		/*
 		 * We want to choose a precision that reflects the best choice
@@ -724,7 +724,7 @@ zcmd_alloc_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, size_t len)
 		len = 16 * 1024;
 	zc->zc_nvlist_dst_size = len;
 	if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t)
-	    zfs_alloc(hdl, zc->zc_nvlist_dst_size)) == NULL)
+	    zfs_alloc(hdl, zc->zc_nvlist_dst_size)) == 0)
 		return (-1);
 
 	return (0);
@@ -740,8 +740,7 @@ zcmd_expand_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 {
 	free((void *)(uintptr_t)zc->zc_nvlist_dst);
 	if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t)
-	    zfs_alloc(hdl, zc->zc_nvlist_dst_size))
-	    == NULL)
+	    zfs_alloc(hdl, zc->zc_nvlist_dst_size)) == 0)
 		return (-1);
 
 	return (0);
diff --git a/lib/libzpool/util.c b/lib/libzpool/util.c
index 9b99531fd..231043d75 100644
--- a/lib/libzpool/util.c
+++ b/lib/libzpool/util.c
@@ -108,7 +108,7 @@ show_vdev_stats(const char *desc, const char *ctype, nvlist_t *nv, int indent)
 		(void) printf("%*s%s%*s%*s%*s %5s %5s %5s %5s %5s %5s %5s\n",
 		    indent, "",
 		    prefix,
-		    indent + strlen(prefix) - 25 - (vs->vs_space ? 0 : 12),
+		    (int)(indent+strlen(prefix)-25-(vs->vs_space ? 0 : 12)),
 		    desc,
 		    vs->vs_space ? 6 : 0, vs->vs_space ? used : "",
 		    vs->vs_space ? 6 : 0, vs->vs_space ? avail : "",
diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index de09ca9a9..e9db5340e 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -1725,12 +1725,12 @@ arc_evict(arc_state_t *state, uint64_t spa, int64_t bytes, boolean_t recycle,
 		if (mru_over > 0 && arc_mru_ghost->arcs_lsize[type] > 0) {
 			int64_t todelete =
 			    MIN(arc_mru_ghost->arcs_lsize[type], mru_over);
-			arc_evict_ghost(arc_mru_ghost, NULL, todelete);
+			arc_evict_ghost(arc_mru_ghost, 0, todelete);
 		} else if (arc_mfu_ghost->arcs_lsize[type] > 0) {
 			int64_t todelete = MIN(arc_mfu_ghost->arcs_lsize[type],
 			    arc_mru_ghost->arcs_size +
 			    arc_mfu_ghost->arcs_size - arc_c);
-			arc_evict_ghost(arc_mfu_ghost, NULL, todelete);
+			arc_evict_ghost(arc_mfu_ghost, 0, todelete);
 		}
 	}
 
@@ -1838,13 +1838,13 @@ arc_adjust(void)
 
 	if (adjustment > 0 && arc_mru->arcs_lsize[ARC_BUFC_DATA] > 0) {
 		delta = MIN(arc_mru->arcs_lsize[ARC_BUFC_DATA], adjustment);
-		(void) arc_evict(arc_mru, NULL, delta, FALSE, ARC_BUFC_DATA);
+		(void) arc_evict(arc_mru, 0, delta, FALSE, ARC_BUFC_DATA);
 		adjustment -= delta;
 	}
 
 	if (adjustment > 0 && arc_mru->arcs_lsize[ARC_BUFC_METADATA] > 0) {
 		delta = MIN(arc_mru->arcs_lsize[ARC_BUFC_METADATA], adjustment);
-		(void) arc_evict(arc_mru, NULL, delta, FALSE,
+		(void) arc_evict(arc_mru, 0, delta, FALSE,
 		    ARC_BUFC_METADATA);
 	}
 
@@ -1856,14 +1856,14 @@ arc_adjust(void)
 
 	if (adjustment > 0 && arc_mfu->arcs_lsize[ARC_BUFC_DATA] > 0) {
 		delta = MIN(adjustment, arc_mfu->arcs_lsize[ARC_BUFC_DATA]);
-		(void) arc_evict(arc_mfu, NULL, delta, FALSE, ARC_BUFC_DATA);
+		(void) arc_evict(arc_mfu, 0, delta, FALSE, ARC_BUFC_DATA);
 		adjustment -= delta;
 	}
 
 	if (adjustment > 0 && arc_mfu->arcs_lsize[ARC_BUFC_METADATA] > 0) {
 		int64_t delta = MIN(adjustment,
 		    arc_mfu->arcs_lsize[ARC_BUFC_METADATA]);
-		(void) arc_evict(arc_mfu, NULL, delta, FALSE,
+		(void) arc_evict(arc_mfu, 0, delta, FALSE,
 		    ARC_BUFC_METADATA);
 	}
 
@@ -1875,7 +1875,7 @@ arc_adjust(void)
 
 	if (adjustment > 0 && arc_mru_ghost->arcs_size > 0) {
 		delta = MIN(arc_mru_ghost->arcs_size, adjustment);
-		arc_evict_ghost(arc_mru_ghost, NULL, delta);
+		arc_evict_ghost(arc_mru_ghost, 0, delta);
 	}
 
 	adjustment =
@@ -1883,7 +1883,7 @@ arc_adjust(void)
 
 	if (adjustment > 0 && arc_mfu_ghost->arcs_size > 0) {
 		delta = MIN(arc_mfu_ghost->arcs_size, adjustment);
-		arc_evict_ghost(arc_mfu_ghost, NULL, delta);
+		arc_evict_ghost(arc_mfu_ghost, 0, delta);
 	}
 }
 
@@ -2303,7 +2303,7 @@ arc_get_data_buf(arc_buf_t *buf)
 		state =  (arc_mru->arcs_lsize[type] >= size &&
 		    mfu_space > arc_mfu->arcs_size) ? arc_mru : arc_mfu;
 	}
-	if ((buf->b_data = arc_evict(state, NULL, size, TRUE, type)) == NULL) {
+	if ((buf->b_data = arc_evict(state, 0, size, TRUE, type)) == NULL) {
 		if (type == ARC_BUFC_METADATA) {
 			buf->b_data = zio_buf_alloc(size);
 			arc_space_consume(size, ARC_SPACE_DATA);
diff --git a/module/zfs/sa.c b/module/zfs/sa.c
index d5c985bf1..cf87c867e 100644
--- a/module/zfs/sa.c
+++ b/module/zfs/sa.c
@@ -1545,12 +1545,12 @@ sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
 
 	mutex_enter(&sa->sa_lock);
 
-	if (!sa->sa_need_attr_registration || sa->sa_master_obj == NULL) {
+	if (!sa->sa_need_attr_registration || sa->sa_master_obj == 0) {
 		mutex_exit(&sa->sa_lock);
 		return;
 	}
 
-	if (sa->sa_reg_attr_obj == NULL) {
+	if (sa->sa_reg_attr_obj == 0) {
 		sa->sa_reg_attr_obj = zap_create(hdl->sa_os,
 		    DMU_OT_SA_ATTR_REGISTRATION, DMU_OT_NONE, 0, tx);
 		VERIFY(zap_add(hdl->sa_os, sa->sa_master_obj,
diff --git a/module/zfs/zap.c b/module/zfs/zap.c
index 288a4d99a..89446a4fb 100644
--- a/module/zfs/zap.c
+++ b/module/zfs/zap.c
@@ -483,7 +483,7 @@ zap_open_leaf(uint64_t blkid, dmu_buf_t *db)
 	ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3);
 
 	/* The chunks should begin at the end of the hash table */
-	ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==,
+	ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, (zap_leaf_chunk_t *)
 	    &l->l_phys->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]);
 
 	/* The chunks should end at the end of the block */
diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c
index 1b63c9bf4..ff31144d3 100644
--- a/module/zfs/zfs_ioctl.c
+++ b/module/zfs/zfs_ioctl.c
@@ -166,7 +166,7 @@ history_str_get(zfs_cmd_t *zc)
 {
 	char *buf;
 
-	if (zc->zc_history == NULL)
+	if (zc->zc_history == 0)
 		return (NULL);
 
 	buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
@@ -1866,7 +1866,7 @@ zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
 	 * which we aren't supposed to do with a DS_MODE_USER
 	 * hold, because it could be inconsistent.
 	 */
-	if (zc->zc_nvlist_dst != NULL &&
+	if (zc->zc_nvlist_dst != 0 &&
 	    !zc->zc_objset_stats.dds_inconsistent &&
 	    dmu_objset_type(os) == DMU_OST_ZFS) {
 		nvlist_t *nv;
@@ -2458,7 +2458,7 @@ zfs_ioc_set_prop(zfs_cmd_t *zc)
 
 	error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors);
 
-	if (zc->zc_nvlist_dst != NULL && errors != NULL) {
+	if (zc->zc_nvlist_dst != 0 && errors != NULL) {
 		(void) put_nvlist(zc, errors);
 	}
 
@@ -2609,7 +2609,7 @@ zfs_ioc_pool_get_props(zfs_cmd_t *zc)
 		spa_close(spa, FTAG);
 	}
 
-	if (error == 0 && zc->zc_nvlist_dst != NULL)
+	if (error == 0 && zc->zc_nvlist_dst != 0)
 		error = put_nvlist(zc, nvp);
 	else
 		error = EFAULT;
@@ -2917,7 +2917,7 @@ zfs_ioc_create(zfs_cmd_t *zc)
 	    strchr(zc->zc_name, '%'))
 		return (EINVAL);
 
-	if (zc->zc_nvlist_src != NULL &&
+	if (zc->zc_nvlist_src != 0 &&
 	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
 	    zc->zc_iflags, &nvprops)) != 0)
 		return (error);
@@ -3041,7 +3041,7 @@ zfs_ioc_snapshot(zfs_cmd_t *zc)
 	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
 		return (EINVAL);
 
-	if (zc->zc_nvlist_src != NULL &&
+	if (zc->zc_nvlist_src != 0 &&
 	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
 	    zc->zc_iflags, &nvprops)) != 0)
 		return (error);
@@ -3563,7 +3563,7 @@ zfs_ioc_recv(zfs_cmd_t *zc)
 	tosnap = strchr(tofs, '@');
 	*tosnap++ = '\0';
 
-	if (zc->zc_nvlist_src != NULL &&
+	if (zc->zc_nvlist_src != 0 &&
 	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
 	    zc->zc_iflags, &props)) != 0)
 		return (error);
@@ -3919,7 +3919,7 @@ zfs_ioc_clear(zfs_cmd_t *zc)
 		nvlist_t *policy;
 		nvlist_t *config = NULL;
 
-		if (zc->zc_nvlist_src == NULL)
+		if (zc->zc_nvlist_src == 0)
 			return (EINVAL);
 
 		if ((error = get_nvlist(zc->zc_nvlist_src,
diff --git a/module/zfs/zil.c b/module/zfs/zil.c
index e89a24e41..fd4d76821 100644
--- a/module/zfs/zil.c
+++ b/module/zfs/zil.c
@@ -1299,7 +1299,7 @@ zil_clean(zilog_t *zilog, uint64_t synced_txg)
 	 * created a bad performance problem.
 	 */
 	if (taskq_dispatch(zilog->zl_clean_taskq,
-	    (void (*)(void *))zil_itxg_clean, clean_me, TQ_NOSLEEP) == NULL)
+	    (void (*)(void *))zil_itxg_clean, clean_me, TQ_NOSLEEP) == 0)
 		zil_itxg_clean(clean_me);
 }