Correct cppcheck errors (#6662)

ZFS buildbot STYLE builder was moved to Ubuntu 17.04
which has a newer version of cppcheck. Handle the
new cppcheck errors.

uu_* functions removed in this commit were unused
and effectively dead code. They are now retired.

Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Giuseppe Di Natale <[email protected]>
Closes #6653

6 files changed, 9 insertions, 311 deletions

diff --git a/.github/suppressions.txt b/.github/suppressions.txt
new file mode 100644
index 000000000..61a2cd233
--- /dev/null
+++ b/.github/suppressions.txt
@@ -0,0 +1,4 @@
+nullPointer:./module/zfs/zfs_vnops.c:839
+preprocessorErrorDirective:./module/zfs/vdev_raidz_math_avx512f.c:243
+preprocessorErrorDirective:./module/zfs/vdev_raidz_math_sse2.c:266
+
diff --git a/Makefile.am b/Makefile.am
index 814998675..b1b7994b7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -65,8 +65,10 @@ lint: cppcheck paxcheck
 
 cppcheck:
 	@if type cppcheck > /dev/null 2>&1; then \
-		cppcheck --inline-suppr --quiet --force --error-exitcode=2 \
-		${top_srcdir}; \
+		cppcheck --quiet --force --error-exitcode=2 \
+			--suppressions-list=.github/suppressions.txt \
+			-UHAVE_SSE2 -UHAVE_AVX512F \
+			${top_srcdir}; \
 	fi
 
 paxcheck:
diff --git a/include/libuutil.h b/include/libuutil.h
index 667542446..71337159a 100644
--- a/include/libuutil.h
+++ b/include/libuutil.h
@@ -99,12 +99,6 @@ extern int *uu_exit_fatal(void);
 extern int *uu_exit_usage(void);
 
 /*
- * string->number conversions
- */
-extern int uu_strtoint(const char *, void *, size_t, int, int64_t, int64_t);
-extern int uu_strtouint(const char *, void *, size_t, int, uint64_t, uint64_t);
-
-/*
  * Debug print facility functions.
  */
 typedef struct uu_dprintf uu_dprintf_t;
diff --git a/lib/libuutil/Makefile.am b/lib/libuutil/Makefile.am
index 4d54485b7..3e6844852 100644
--- a/lib/libuutil/Makefile.am
+++ b/lib/libuutil/Makefile.am
@@ -17,8 +17,7 @@ USER_C = \
 	uu_misc.c \
 	uu_open.c \
 	uu_pname.c \
-	uu_string.c \
-	uu_strtoint.c
+	uu_string.c
 
 KERNEL_C =
 
diff --git a/lib/libuutil/uu_strtoint.c b/lib/libuutil/uu_strtoint.c
deleted file mode 100644
index 494e0a5b9..000000000
--- a/lib/libuutil/uu_strtoint.c
+++ /dev/null
@@ -1,300 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-
-
-#include "libuutil_common.h"
-
-#include <limits.h>
-#include <ctype.h>
-
-#define	MAX_BASE	36
-
-#define	IS_DIGIT(x)	((x) >= '0' && (x) <= '9')
-
-#define	CTOI(x) (((x) >= '0' && (x) <= '9') ? (x) - '0' : \
-	    ((x) >= 'a' && (x) <= 'z') ? (x) + 10 - 'a' : (x) + 10 - 'A')
-
-static int
-strtoint(const char *s_arg, uint64_t *out, uint32_t base, int sign)
-{
-	const unsigned char *s = (const unsigned char *)s_arg;
-
-	uint64_t val = 0;
-	uint64_t multmax;
-
-	unsigned c, i;
-
-	int neg = 0;
-
-	int bad_digit = 0;
-	int bad_char = 0;
-	int overflow = 0;
-
-	if (s == NULL || base == 1 || base > MAX_BASE) {
-		uu_set_error(UU_ERROR_INVALID_ARGUMENT);
-		return (-1);
-	}
-
-	while ((c = *s) != 0 && isspace(c))
-		s++;
-
-	switch (c) {
-	case '-':
-		if (!sign)
-			overflow = 1;		/* becomes underflow below */
-		neg = 1;
-		/*FALLTHRU*/
-	case '+':
-		c = *++s;
-		break;
-	default:
-		break;
-	}
-
-	if (c == '\0') {
-		uu_set_error(UU_ERROR_EMPTY);
-		return (-1);
-	}
-
-	if (base == 0) {
-		if (c != '0')
-			base = 10;
-		else if (s[1] == 'x' || s[1] == 'X')
-			base = 16;
-		else
-			base = 8;
-	}
-
-	if (base == 16 && c == '0' && (s[1] == 'x' || s[1] == 'X'))
-		c = *(s += 2);
-
-	if ((val = CTOI(c)) >= base) {
-		if (IS_DIGIT(c))
-			bad_digit = 1;
-		else
-			bad_char = 1;
-		val = 0;
-	}
-
-	multmax = (uint64_t)UINT64_MAX / (uint64_t)base;
-
-	for (c = *++s; c != '\0'; c = *++s) {
-		if ((i = CTOI(c)) >= base) {
-			if (isspace(c))
-				break;
-			if (IS_DIGIT(c))
-				bad_digit = 1;
-			else
-				bad_char = 1;
-			i = 0;
-		}
-
-		if (val > multmax)
-			overflow = 1;
-
-		val *= base;
-		if ((uint64_t)UINT64_MAX - val < (uint64_t)i)
-			overflow = 1;
-
-		val += i;
-	}
-
-	while ((c = *s) != 0) {
-		if (!isspace(c))
-			bad_char = 1;
-		s++;
-	}
-
-	if (sign) {
-		if (neg) {
-			if (val > -(uint64_t)INT64_MIN)
-				overflow = 1;
-		} else {
-			if (val > INT64_MAX)
-				overflow = 1;
-		}
-	}
-
-	if (neg)
-		val = -val;
-
-	if (bad_char | bad_digit | overflow) {
-		if (bad_char)
-			uu_set_error(UU_ERROR_INVALID_CHAR);
-		else if (bad_digit)
-			uu_set_error(UU_ERROR_INVALID_DIGIT);
-		else if (overflow) {
-			if (neg)
-				uu_set_error(UU_ERROR_UNDERFLOW);
-			else
-				uu_set_error(UU_ERROR_OVERFLOW);
-		}
-		return (-1);
-	}
-
-	*out = val;
-	return (0);
-}
-
-int
-uu_strtoint(const char *s, void *v, size_t sz, int base,
-    int64_t min, int64_t max)
-{
-	uint64_t val_u;
-	int64_t val;
-
-	if (min > max)
-		goto bad_argument;
-
-	switch (sz) {
-	case 1:
-		if (max > INT8_MAX || min < INT8_MIN)
-			goto bad_argument;
-		break;
-	case 2:
-		if (max > INT16_MAX || min < INT16_MIN)
-			goto bad_argument;
-		break;
-	case 4:
-		if (max > INT32_MAX || min < INT32_MIN)
-			goto bad_argument;
-		break;
-	case 8:
-		if (max > INT64_MAX || min < INT64_MIN)
-			goto bad_argument;
-		break;
-	default:
-		goto bad_argument;
-	}
-
-	if (min == 0 && max == 0) {
-		min = -(1ULL << (8 * sz - 1));
-		max = (1ULL << (8 * sz - 1)) - 1;
-	}
-
-	if (strtoint(s, &val_u, base, 1) == -1)
-		return (-1);
-
-	val = (int64_t)val_u;
-
-	if (val < min) {
-		uu_set_error(UU_ERROR_UNDERFLOW);
-		return (-1);
-	} else if (val > max) {
-		uu_set_error(UU_ERROR_OVERFLOW);
-		return (-1);
-	}
-
-	switch (sz) {
-	case 1:
-		*(int8_t *)v = val;
-		return (0);
-	case 2:
-		*(int16_t *)v = val;
-		return (0);
-	case 4:
-		*(int32_t *)v = val;
-		return (0);
-	case 8:
-		*(int64_t *)v = val;
-		return (0);
-	default:
-		break;		/* fall through to bad_argument */
-	}
-
-bad_argument:
-	uu_set_error(UU_ERROR_INVALID_ARGUMENT);
-	return (-1);
-}
-
-int
-uu_strtouint(const char *s, void *v, size_t sz, int base,
-    uint64_t min, uint64_t max)
-{
-	uint64_t val;
-
-	if (min > max)
-		goto bad_argument;
-
-	switch (sz) {
-	case 1:
-		if (max > UINT8_MAX)
-			goto bad_argument;
-		break;
-	case 2:
-		if (max > UINT16_MAX)
-			goto bad_argument;
-		break;
-	case 4:
-		if (max > UINT32_MAX)
-			goto bad_argument;
-		break;
-	case 8:
-		if (max > UINT64_MAX)
-			goto bad_argument;
-		break;
-	default:
-		goto bad_argument;
-	}
-
-	if (min == 0 && max == 0) {
-		/* we have to be careful, since << can overflow */
-		max = (1ULL << (8 * sz - 1)) * 2 - 1;
-	}
-
-	if (strtoint(s, &val, base, 0) == -1)
-		return (-1);
-
-	if (val < min) {
-		uu_set_error(UU_ERROR_UNDERFLOW);
-		return (-1);
-	} else if (val > max) {
-		uu_set_error(UU_ERROR_OVERFLOW);
-		return (-1);
-	}
-
-	switch (sz) {
-	case 1:
-		*(uint8_t *)v = val;
-		return (0);
-	case 2:
-		*(uint16_t *)v = val;
-		return (0);
-	case 4:
-		*(uint32_t *)v = val;
-		return (0);
-	case 8:
-		*(uint64_t *)v = val;
-		return (0);
-	default:
-		break;		/* shouldn't happen, fall through */
-	}
-
-bad_argument:
-	uu_set_error(UU_ERROR_INVALID_ARGUMENT);
-	return (-1);
-}
diff --git a/module/zfs/zfs_vnops.c b/module/zfs/zfs_vnops.c
index 8d846ee40..259bfb309 100644
--- a/module/zfs/zfs_vnops.c
+++ b/module/zfs/zfs_vnops.c
@@ -836,7 +836,6 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
 			    aiov->iov_base != abuf->b_data)) {
 				ASSERT(xuio);
 				dmu_write(zfsvfs->z_os, zp->z_id, woff,
-				    // cppcheck-suppress nullPointer
 				    aiov->iov_len, aiov->iov_base, tx);
 				dmu_return_arcbuf(abuf);
 				xuio_stat_wbuf_copied();