* drivers/iommu/apple-dart.c:671:22: warning: Value stored to 'res' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
@ 2022-02-20 23:06 kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2022-02-20 23:06 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 15344 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Sven Peter <sven@svenpeter.dev>
CC: Joerg Roedel <jroedel@suse.de>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3324e6e803156b4296975555f566892e4e3f4fcf
commit: 46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f iommu/dart: Add DART iommu driver
date: 6 months ago
:::::: branch date: 2 hours ago
:::::: commit date: 6 months ago
config: riscv-randconfig-c006-20220215 (https://download.01.org/0day-ci/archive/20220221/202202210746.IXOCDPKb-lkp(a)intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 37f422f4ac31c8b8041c6b62065263314282dab6)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
include/linux/list.h:511:2: note: expanded from macro 'list_entry'
container_of(ptr, type, member)
^
include/linux/kernel.h:495:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:306:2: note: expanded from macro '__compiletime_assert'
do { \
^
drivers/base/regmap/regmap-debugfs.c:75:3: note: Calling 'list_del'
list_del(&c->list);
^~~~~~~~~~~~~~~~~~
include/linux/list.h:146:2: note: Calling '__list_del_entry'
__list_del_entry(entry);
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:132:2: note: Taking false branch
if (!__list_del_entry_valid(entry))
^
include/linux/list.h:135:13: note: Use of memory after it is freed
__list_del(entry->prev, entry->next);
^~~~~~~~~~~
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
fs/ubifs/tnc_misc.c:51:35: warning: Access to field 'level' results in a dereference of a null pointer (loaded from variable 'zr') [clang-analyzer-core.NullDereference]
ubifs_assert(c, znode->level <= zr->level);
^
fs/ubifs/debug.h:143:17: note: expanded from macro 'ubifs_assert'
if (unlikely(!(expr))) { \
^~~~
include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
fs/ubifs/tnc_misc.c:36:2: note: Assuming 'zr' is null
ubifs_assert(c, zr);
^
fs/ubifs/debug.h:143:15: note: expanded from macro 'ubifs_assert'
if (unlikely(!(expr))) { \
~~~~~~~~~^~~~~~~~
include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
fs/ubifs/tnc_misc.c:36:2: note: Taking true branch
ubifs_assert(c, zr);
^
fs/ubifs/debug.h:143:2: note: expanded from macro 'ubifs_assert'
if (unlikely(!(expr))) { \
^
fs/ubifs/tnc_misc.c:36:2: note: Loop condition is false. Exiting loop
ubifs_assert(c, zr);
^
fs/ubifs/debug.h:142:31: note: expanded from macro 'ubifs_assert'
#define ubifs_assert(c, expr) do { \
^
fs/ubifs/tnc_misc.c:38:15: note: Assuming 'znode' is non-null
if (unlikely(!znode))
^
include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
fs/ubifs/tnc_misc.c:38:2: note: Taking false branch
if (unlikely(!znode))
^
fs/ubifs/tnc_misc.c:41:15: note: 'znode' is not equal to 'zr'
if (unlikely(znode == zr)) {
^
include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
fs/ubifs/tnc_misc.c:41:2: note: Taking false branch
if (unlikely(znode == zr)) {
^
fs/ubifs/tnc_misc.c:50:2: note: Loop condition is true. Entering loop body
while (1) {
^
fs/ubifs/tnc_misc.c:51:35: note: Access to field 'level' results in a dereference of a null pointer (loaded from variable 'zr')
ubifs_assert(c, znode->level <= zr->level);
^
fs/ubifs/debug.h:143:17: note: expanded from macro 'ubifs_assert'
if (unlikely(!(expr))) { \
^~~~
include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
>> drivers/iommu/apple-dart.c:671:22: warning: Value stored to 'res' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
drivers/iommu/apple-dart.c:671:22: note: Value stored to 'res' during its initialization is never read
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
drivers/iio/adc/meson_saradc.c:1049:13: warning: The left operand of '<=' is a garbage value [clang-analyzer-core.UndefinedBinaryOperatorResult]
if (value1 <= value0) {
^
drivers/iio/adc/meson_saradc.c:1186:6: note: Assuming 'indio_dev' is non-null
if (!indio_dev) {
^~~~~~~~~~
drivers/iio/adc/meson_saradc.c:1186:2: note: Taking false branch
if (!indio_dev) {
^
drivers/iio/adc/meson_saradc.c:1195:6: note: Assuming 'match_data' is non-null
if (!match_data) {
^~~~~~~~~~~
drivers/iio/adc/meson_saradc.c:1195:2: note: Taking false branch
if (!match_data) {
^
drivers/iio/adc/meson_saradc.c:1207:2: note: Taking false branch
if (IS_ERR(base))
^
drivers/iio/adc/meson_saradc.c:1212:2: note: Taking false branch
if (IS_ERR(priv->regmap))
^
drivers/iio/adc/meson_saradc.c:1216:6: note: Assuming 'irq' is not equal to 0
if (!irq)
^~~~
drivers/iio/adc/meson_saradc.c:1216:2: note: Taking false branch
if (!irq)
^
drivers/iio/adc/meson_saradc.c:1221:6: note: Assuming 'ret' is 0
if (ret)
^~~
drivers/iio/adc/meson_saradc.c:1221:2: note: Taking false branch
if (ret)
^
drivers/iio/adc/meson_saradc.c:1225:2: note: Taking false branch
if (IS_ERR(priv->clkin)) {
^
drivers/iio/adc/meson_saradc.c:1231:2: note: Taking false branch
if (IS_ERR(priv->core_clk)) {
^
drivers/iio/adc/meson_saradc.c:1237:2: note: Taking false branch
if (IS_ERR(priv->adc_clk)) {
^
drivers/iio/adc/meson_saradc.c:1247:2: note: Taking false branch
if (IS_ERR(priv->adc_sel_clk)) {
^
drivers/iio/adc/meson_saradc.c:1257:6: note: Assuming field 'adc_clk' is non-null
if (!priv->adc_clk) {
^~~~~~~~~~~~~~
drivers/iio/adc/meson_saradc.c:1257:2: note: Taking false branch
if (!priv->adc_clk) {
vim +/res +671 drivers/iommu/apple-dart.c
46d1fb072e76b1 Sven Peter 2021-08-03 663
46d1fb072e76b1 Sven Peter 2021-08-03 664 static struct iommu_group *apple_dart_device_group(struct device *dev)
46d1fb072e76b1 Sven Peter 2021-08-03 665 {
46d1fb072e76b1 Sven Peter 2021-08-03 666 static DEFINE_MUTEX(lock);
46d1fb072e76b1 Sven Peter 2021-08-03 667 int i, sid;
46d1fb072e76b1 Sven Peter 2021-08-03 668 struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
46d1fb072e76b1 Sven Peter 2021-08-03 669 struct apple_dart_stream_map *stream_map;
46d1fb072e76b1 Sven Peter 2021-08-03 670 struct iommu_group *group = NULL;
46d1fb072e76b1 Sven Peter 2021-08-03 @671 struct iommu_group *res = ERR_PTR(-EINVAL);
46d1fb072e76b1 Sven Peter 2021-08-03 672
46d1fb072e76b1 Sven Peter 2021-08-03 673 mutex_lock(&lock);
46d1fb072e76b1 Sven Peter 2021-08-03 674
46d1fb072e76b1 Sven Peter 2021-08-03 675 for_each_stream_map(i, cfg, stream_map) {
46d1fb072e76b1 Sven Peter 2021-08-03 676 for_each_set_bit(sid, &stream_map->sidmap, DART_MAX_STREAMS) {
46d1fb072e76b1 Sven Peter 2021-08-03 677 struct iommu_group *stream_group =
46d1fb072e76b1 Sven Peter 2021-08-03 678 stream_map->dart->sid2group[sid];
46d1fb072e76b1 Sven Peter 2021-08-03 679
46d1fb072e76b1 Sven Peter 2021-08-03 680 if (group && group != stream_group) {
46d1fb072e76b1 Sven Peter 2021-08-03 681 res = ERR_PTR(-EINVAL);
46d1fb072e76b1 Sven Peter 2021-08-03 682 goto out;
46d1fb072e76b1 Sven Peter 2021-08-03 683 }
46d1fb072e76b1 Sven Peter 2021-08-03 684
46d1fb072e76b1 Sven Peter 2021-08-03 685 group = stream_group;
46d1fb072e76b1 Sven Peter 2021-08-03 686 }
46d1fb072e76b1 Sven Peter 2021-08-03 687 }
46d1fb072e76b1 Sven Peter 2021-08-03 688
46d1fb072e76b1 Sven Peter 2021-08-03 689 if (group) {
46d1fb072e76b1 Sven Peter 2021-08-03 690 res = iommu_group_ref_get(group);
46d1fb072e76b1 Sven Peter 2021-08-03 691 goto out;
46d1fb072e76b1 Sven Peter 2021-08-03 692 }
46d1fb072e76b1 Sven Peter 2021-08-03 693
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
^ permalink raw reply [flat|nested] 3+ messages in thread* drivers/iommu/apple-dart.c:671:22: warning: Value stored to 'res' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
@ 2022-01-16 8:51 kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2022-01-16 8:51 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 31268 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Sven Peter <sven@svenpeter.dev>
CC: Joerg Roedel <jroedel@suse.de>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a33f5c380c4bd3fa5278d690421b72052456d9fe
commit: 46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f iommu/dart: Add DART iommu driver
date: 5 months ago
:::::: branch date: 27 hours ago
:::::: commit date: 5 months ago
config: riscv-randconfig-c006-20220116 (https://download.01.org/0day-ci/archive/20220116/202201161639.F0YG2q8d-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 650fc40b6d8d9a5869b4fca525d5f237b0ee2803)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
Suppressed 10 warnings (8 in non-user code, 2 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
>> drivers/iommu/apple-dart.c:671:22: warning: Value stored to 'res' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
drivers/iommu/apple-dart.c:671:22: note: Value stored to 'res' during its initialization is never read
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
drivers/gpu/drm/drm_crtc_helper.c:635:2: warning: Value stored to 'count' is never read [clang-analyzer-deadcode.DeadStores]
count = 0;
^ ~
drivers/gpu/drm/drm_crtc_helper.c:635:2: note: Value stored to 'count' is never read
count = 0;
^ ~
drivers/gpu/drm/drm_crtc_helper.c:681:2: warning: Value stored to 'count' is never read [clang-analyzer-deadcode.DeadStores]
count = 0;
^ ~
drivers/gpu/drm/drm_crtc_helper.c:681:2: note: Value stored to 'count' is never read
count = 0;
^ ~
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
drivers/gpu/drm/panfrost/panfrost_mmu.c:70:35: warning: The result of the left shift is undefined because the right operand is negative [clang-analyzer-core.UndefinedBinaryOperatorResult]
if ((size >> PAGE_SHIFT) != (1ul << (region_width - 11))) {
^
drivers/gpu/drm/panfrost/panfrost_mmu.c:386:6: note: Assuming field 'as' is >= 0
if (mmu->as >= 0) {
^~~~~~~~~~~~
drivers/gpu/drm/panfrost/panfrost_mmu.c:386:2: note: Taking true branch
if (mmu->as >= 0) {
^
drivers/gpu/drm/panfrost/panfrost_mmu.c:388:3: note: Taking true branch
if (pm_runtime_active(pfdev->dev))
^
drivers/gpu/drm/panfrost/panfrost_mmu.c:389:4: note: Calling 'panfrost_mmu_disable'
panfrost_mmu_disable(pfdev, mmu->as);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/panfrost/panfrost_mmu.c:134:2: note: Calling 'mmu_hw_do_operation_locked'
mmu_hw_do_operation_locked(pfdev, as_nr, 0, ~0UL, AS_COMMAND_FLUSH_MEM);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/panfrost/panfrost_mmu.c:86:6: note: 'as_nr' is >= 0
if (as_nr < 0)
^~~~~
drivers/gpu/drm/panfrost/panfrost_mmu.c:86:2: note: Taking false branch
if (as_nr < 0)
^
drivers/gpu/drm/panfrost/panfrost_mmu.c:89:6: note: 'op' is not equal to AS_COMMAND_UNLOCK
if (op != AS_COMMAND_UNLOCK)
^~
drivers/gpu/drm/panfrost/panfrost_mmu.c:89:2: note: Taking true branch
if (op != AS_COMMAND_UNLOCK)
^
drivers/gpu/drm/panfrost/panfrost_mmu.c:90:3: note: Calling 'lock_region'
lock_region(pfdev, as_nr, iova, size);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/panfrost/panfrost_mmu.c:70:35: note: The result of the left shift is undefined because the right operand is negative
if ((size >> PAGE_SHIFT) != (1ul << (region_width - 11))) {
--
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1164:8: note: Returning from 'komeda_splitter_validate'
err = komeda_splitter_validate(pipe->splitter, conn_st,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:6: note: Assuming 'err' is 0
if (err)
^~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:2: note: Taking false branch
if (err)
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1168:8: note: Calling 'komeda_scaler_validate'
err = komeda_scaler_validate(conn, kcrtc_st, &l_dflow);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: note: Branch condition evaluates to a garbage value
if (!(dflow->en_scaling || dflow->en_img_enhancement))
^~~~~~~~~~~~~~~~~
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
11 warnings generated.
drivers/gpu/drm/exynos/exynos_drm_dma.c:87:29: warning: Value stored to 'priv' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct exynos_drm_private *priv = drm_dev->dev_private;
^~~~ ~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:87:29: note: Value stored to 'priv' during its initialization is never read
struct exynos_drm_private *priv = drm_dev->dev_private;
^~~~ ~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:119:7: warning: 1st function call argument is an uninitialized value [clang-analyzer-core.CallAndMessage]
if (IS_ERR(mapping))
^ ~~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:101:6: note: Assuming field 'dma_dev' is non-null
if (!priv->dma_dev) {
^~~~~~~~~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:101:2: note: Taking false branch
if (!priv->dma_dev) {
^
drivers/gpu/drm/exynos/exynos_drm_dma.c:107:2: note: Taking false branch
if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
^
drivers/gpu/drm/exynos/exynos_drm_dma.c:110:6: note: Assuming field 'mapping' is null
if (!priv->mapping) {
^~~~~~~~~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:110:2: note: Taking true branch
if (!priv->mapping) {
^
drivers/gpu/drm/exynos/exynos_drm_dma.c:111:3: note: 'mapping' declared without an initial value
void *mapping;
^~~~~~~~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:113:3: note: Taking false branch
if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
^
drivers/gpu/drm/exynos/exynos_drm_dma.c:116:8: note: Taking false branch
else if (IS_ENABLED(CONFIG_IOMMU_DMA))
^
drivers/gpu/drm/exynos/exynos_drm_dma.c:119:7: note: 1st function call argument is an uninitialized value
if (IS_ERR(mapping))
^ ~~~~~~~
Suppressed 9 warnings (8 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
Suppressed 10 warnings (5 in non-user code, 5 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
>> drivers/iommu/apple-dart.c:671:22: warning: Value stored to 'res' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
drivers/iommu/apple-dart.c:671:22: note: Value stored to 'res' during its initialization is never read
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
drivers/gpu/drm/drm_crtc_helper.c:635:2: warning: Value stored to 'count' is never read [clang-analyzer-deadcode.DeadStores]
count = 0;
^ ~
drivers/gpu/drm/drm_crtc_helper.c:635:2: note: Value stored to 'count' is never read
count = 0;
^ ~
drivers/gpu/drm/drm_crtc_helper.c:681:2: warning: Value stored to 'count' is never read [clang-analyzer-deadcode.DeadStores]
count = 0;
^ ~
drivers/gpu/drm/drm_crtc_helper.c:681:2: note: Value stored to 'count' is never read
count = 0;
^ ~
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
drivers/w1/slaves/w1_ds2438.c:69:3: warning: Value stored to 'crc' is never read [clang-analyzer-deadcode.DeadStores]
crc = 0;
^ ~
drivers/w1/slaves/w1_ds2438.c:69:3: note: Value stored to 'crc' is never read
crc = 0;
^ ~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
vim +/res +671 drivers/iommu/apple-dart.c
46d1fb072e76b1 Sven Peter 2021-08-03 663
46d1fb072e76b1 Sven Peter 2021-08-03 664 static struct iommu_group *apple_dart_device_group(struct device *dev)
46d1fb072e76b1 Sven Peter 2021-08-03 665 {
46d1fb072e76b1 Sven Peter 2021-08-03 666 static DEFINE_MUTEX(lock);
46d1fb072e76b1 Sven Peter 2021-08-03 667 int i, sid;
46d1fb072e76b1 Sven Peter 2021-08-03 668 struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
46d1fb072e76b1 Sven Peter 2021-08-03 669 struct apple_dart_stream_map *stream_map;
46d1fb072e76b1 Sven Peter 2021-08-03 670 struct iommu_group *group = NULL;
46d1fb072e76b1 Sven Peter 2021-08-03 @671 struct iommu_group *res = ERR_PTR(-EINVAL);
46d1fb072e76b1 Sven Peter 2021-08-03 672
46d1fb072e76b1 Sven Peter 2021-08-03 673 mutex_lock(&lock);
46d1fb072e76b1 Sven Peter 2021-08-03 674
46d1fb072e76b1 Sven Peter 2021-08-03 675 for_each_stream_map(i, cfg, stream_map) {
46d1fb072e76b1 Sven Peter 2021-08-03 676 for_each_set_bit(sid, &stream_map->sidmap, DART_MAX_STREAMS) {
46d1fb072e76b1 Sven Peter 2021-08-03 677 struct iommu_group *stream_group =
46d1fb072e76b1 Sven Peter 2021-08-03 678 stream_map->dart->sid2group[sid];
46d1fb072e76b1 Sven Peter 2021-08-03 679
46d1fb072e76b1 Sven Peter 2021-08-03 680 if (group && group != stream_group) {
46d1fb072e76b1 Sven Peter 2021-08-03 681 res = ERR_PTR(-EINVAL);
46d1fb072e76b1 Sven Peter 2021-08-03 682 goto out;
46d1fb072e76b1 Sven Peter 2021-08-03 683 }
46d1fb072e76b1 Sven Peter 2021-08-03 684
46d1fb072e76b1 Sven Peter 2021-08-03 685 group = stream_group;
46d1fb072e76b1 Sven Peter 2021-08-03 686 }
46d1fb072e76b1 Sven Peter 2021-08-03 687 }
46d1fb072e76b1 Sven Peter 2021-08-03 688
46d1fb072e76b1 Sven Peter 2021-08-03 689 if (group) {
46d1fb072e76b1 Sven Peter 2021-08-03 690 res = iommu_group_ref_get(group);
46d1fb072e76b1 Sven Peter 2021-08-03 691 goto out;
46d1fb072e76b1 Sven Peter 2021-08-03 692 }
46d1fb072e76b1 Sven Peter 2021-08-03 693
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
^ permalink raw reply [flat|nested] 3+ messages in thread* drivers/iommu/apple-dart.c:671:22: warning: Value stored to 'res' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
@ 2021-12-12 4:44 kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2021-12-12 4:44 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 17018 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Sven Peter <sven@svenpeter.dev>
CC: Joerg Roedel <jroedel@suse.de>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a763d5a5abd65797aec3dd1bf01fe2ccbec32967
commit: 46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f iommu/dart: Add DART iommu driver
date: 4 months ago
:::::: branch date: 4 hours ago
:::::: commit date: 4 months ago
config: riscv-randconfig-c006-20211210 (https://download.01.org/0day-ci/archive/20211212/202112121226.jkHT0ZTU-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
^
mm/vmalloc.c:2015:20: note: '?' condition is false
offset = (addr & (VMAP_BLOCK_SIZE - 1)) >> PAGE_SHIFT;
^
mm/vmalloc.c:1786:27: note: expanded from macro 'VMAP_BLOCK_SIZE'
#define VMAP_BLOCK_SIZE (VMAP_BBMAP_BITS * PAGE_SIZE)
^
mm/vmalloc.c:1784:20: note: expanded from macro 'VMAP_BBMAP_BITS'
VMALLOC_PAGES / roundup_pow_of_two(NR_CPUS) / 16))
^
include/linux/log2.h:178:12: note: expanded from macro 'roundup_pow_of_two'
(1UL << (ilog2((n) - 1) + 1)) \
^
include/linux/log2.h:159:3: note: expanded from macro 'ilog2'
((n) < 2 ? 0 : \
^
mm/vmalloc.c:2015:20: note: Assuming the condition is true
offset = (addr & (VMAP_BLOCK_SIZE - 1)) >> PAGE_SHIFT;
^
mm/vmalloc.c:1786:27: note: expanded from macro 'VMAP_BLOCK_SIZE'
#define VMAP_BLOCK_SIZE (VMAP_BBMAP_BITS * PAGE_SIZE)
^~~~~~~~~~~~~~~
mm/vmalloc.c:1782:3: note: expanded from macro 'VMAP_BBMAP_BITS'
VMAP_MIN(VMAP_BBMAP_BITS_MAX, \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/vmalloc.c:1779:26: note: expanded from macro 'VMAP_MIN'
#define VMAP_MIN(x, y) ((x) < (y) ? (x) : (y)) /* can't use min() */
^~~~~~~~~
mm/vmalloc.c:2015:20: note: '?' condition is true
offset = (addr & (VMAP_BLOCK_SIZE - 1)) >> PAGE_SHIFT;
^
mm/vmalloc.c:1786:27: note: expanded from macro 'VMAP_BLOCK_SIZE'
#define VMAP_BLOCK_SIZE (VMAP_BBMAP_BITS * PAGE_SIZE)
^
mm/vmalloc.c:1782:3: note: expanded from macro 'VMAP_BBMAP_BITS'
VMAP_MIN(VMAP_BBMAP_BITS_MAX, \
^
mm/vmalloc.c:1779:26: note: expanded from macro 'VMAP_MIN'
#define VMAP_MIN(x, y) ((x) < (y) ? (x) : (y)) /* can't use min() */
^
mm/vmalloc.c:2020:2: note: Taking false branch
if (debug_pagealloc_enabled_static())
^
mm/vmalloc.c:2026:18: note: Assuming '__UNIQUE_ID___x342' is >= '__UNIQUE_ID___y343'
vb->dirty_min = min(vb->dirty_min, offset);
^
include/linux/minmax.h:45:19: note: expanded from macro 'min'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:38:3: note: expanded from macro '__careful_cmp'
__cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:33:3: note: expanded from macro '__cmp_once'
__cmp(unique_x, unique_y, op); })
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:28:26: note: expanded from macro '__cmp'
#define __cmp(x, y, op) ((x) op (y) ? (x) : (y))
^~~~~~~~~~
mm/vmalloc.c:2026:18: note: '?' condition is false
vb->dirty_min = min(vb->dirty_min, offset);
^
include/linux/minmax.h:45:19: note: expanded from macro 'min'
#define min(x, y) __careful_cmp(x, y, <)
^
include/linux/minmax.h:38:3: note: expanded from macro '__careful_cmp'
__cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
^
include/linux/minmax.h:33:3: note: expanded from macro '__cmp_once'
__cmp(unique_x, unique_y, op); })
^
include/linux/minmax.h:28:26: note: expanded from macro '__cmp'
#define __cmp(x, y, op) ((x) op (y) ? (x) : (y))
^
mm/vmalloc.c:2027:51: note: The result of the left shift is undefined due to shifting by '64', which is greater or equal to the width of type 'unsigned long'
vb->dirty_max = max(vb->dirty_max, offset + (1UL << order));
^
include/linux/minmax.h:52:36: note: expanded from macro 'max'
#define max(x, y) __careful_cmp(x, y, >)
^
include/linux/minmax.h:38:17: note: expanded from macro '__careful_cmp'
__cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
^
include/linux/minmax.h:32:25: note: expanded from macro '__cmp_once'
typeof(y) unique_y = (y); \
^
Suppressed 5 warnings (4 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
drivers/iommu/sun50i-iommu.c:511:3: warning: Value stored to 'dte' is never read [clang-analyzer-deadcode.DeadStores]
dte = old_dte;
^ ~~~~~~~
drivers/iommu/sun50i-iommu.c:511:3: note: Value stored to 'dte' is never read
dte = old_dte;
^ ~~~~~~~
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
>> drivers/iommu/apple-dart.c:671:22: warning: Value stored to 'res' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
drivers/iommu/apple-dart.c:671:22: note: Value stored to 'res' during its initialization is never read
struct iommu_group *res = ERR_PTR(-EINVAL);
^~~ ~~~~~~~~~~~~~~~~
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
vim +/res +671 drivers/iommu/apple-dart.c
46d1fb072e76b1 Sven Peter 2021-08-03 663
46d1fb072e76b1 Sven Peter 2021-08-03 664 static struct iommu_group *apple_dart_device_group(struct device *dev)
46d1fb072e76b1 Sven Peter 2021-08-03 665 {
46d1fb072e76b1 Sven Peter 2021-08-03 666 static DEFINE_MUTEX(lock);
46d1fb072e76b1 Sven Peter 2021-08-03 667 int i, sid;
46d1fb072e76b1 Sven Peter 2021-08-03 668 struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
46d1fb072e76b1 Sven Peter 2021-08-03 669 struct apple_dart_stream_map *stream_map;
46d1fb072e76b1 Sven Peter 2021-08-03 670 struct iommu_group *group = NULL;
46d1fb072e76b1 Sven Peter 2021-08-03 @671 struct iommu_group *res = ERR_PTR(-EINVAL);
46d1fb072e76b1 Sven Peter 2021-08-03 672
46d1fb072e76b1 Sven Peter 2021-08-03 673 mutex_lock(&lock);
46d1fb072e76b1 Sven Peter 2021-08-03 674
46d1fb072e76b1 Sven Peter 2021-08-03 675 for_each_stream_map(i, cfg, stream_map) {
46d1fb072e76b1 Sven Peter 2021-08-03 676 for_each_set_bit(sid, &stream_map->sidmap, DART_MAX_STREAMS) {
46d1fb072e76b1 Sven Peter 2021-08-03 677 struct iommu_group *stream_group =
46d1fb072e76b1 Sven Peter 2021-08-03 678 stream_map->dart->sid2group[sid];
46d1fb072e76b1 Sven Peter 2021-08-03 679
46d1fb072e76b1 Sven Peter 2021-08-03 680 if (group && group != stream_group) {
46d1fb072e76b1 Sven Peter 2021-08-03 681 res = ERR_PTR(-EINVAL);
46d1fb072e76b1 Sven Peter 2021-08-03 682 goto out;
46d1fb072e76b1 Sven Peter 2021-08-03 683 }
46d1fb072e76b1 Sven Peter 2021-08-03 684
46d1fb072e76b1 Sven Peter 2021-08-03 685 group = stream_group;
46d1fb072e76b1 Sven Peter 2021-08-03 686 }
46d1fb072e76b1 Sven Peter 2021-08-03 687 }
46d1fb072e76b1 Sven Peter 2021-08-03 688
46d1fb072e76b1 Sven Peter 2021-08-03 689 if (group) {
46d1fb072e76b1 Sven Peter 2021-08-03 690 res = iommu_group_ref_get(group);
46d1fb072e76b1 Sven Peter 2021-08-03 691 goto out;
46d1fb072e76b1 Sven Peter 2021-08-03 692 }
46d1fb072e76b1 Sven Peter 2021-08-03 693
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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