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Date: Wed, 6 Jun 2018 05:21:55 +0800
From: kbuild test robot <lkp@...el.com>
To: changbin.du@...el.com
Cc: kbuild-all@...org, mingo@...hat.com, akpm@...ux-foundation.org,
yamada.masahiro@...ionext.com, michal.lkml@...kovi.net,
rostedt@...dmis.org, tglx@...utronix.de, rdunlap@...radead.org,
x86@...nel.org, linux@...linux.org.uk, lgirdwood@...il.com,
broonie@...nel.org, arnd@...db.de, linux-kbuild@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-sparse@...r.kernel.org,
changbin.du@...il.com, Changbin Du <changbin.du@...el.com>
Subject: Re: [PATCH v5 2/4] kernel hacking: new config NO_AUTO_INLINE to
disable compiler auto-inline optimizations
Hi Changbin,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v4.17 next-20180605]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/changbin-du-intel-com/kernel-hacking-GCC-optimization-for-better-debug-experience-Og/20180606-001415
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 8.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=ia64
All warnings (new ones prefixed by >>):
drivers//staging/greybus/fw-management.c: In function 'fw_mgmt_load_and_validate_operation':
>> drivers//staging/greybus/fw-management.c:153:2: warning: 'strncpy' specified bound 10 equals destination size [-Wstringop-truncation]
strncpy(request.firmware_tag, tag, GB_FIRMWARE_TAG_MAX_SIZE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers//staging/greybus/fw-management.c: In function 'fw_mgmt_backend_fw_update_operation':
drivers//staging/greybus/fw-management.c:304:2: warning: 'strncpy' specified bound 10 equals destination size [-Wstringop-truncation]
strncpy(request.firmware_tag, tag, GB_FIRMWARE_TAG_MAX_SIZE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
drivers/auxdisplay/panel.c: In function 'panel_bind_key':
>> drivers/auxdisplay/panel.c:1509:2: warning: 'strncpy' specified bound 12 equals destination size [-Wstringop-truncation]
strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/auxdisplay/panel.c:1510:2: warning: 'strncpy' specified bound 12 equals destination size [-Wstringop-truncation]
strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/strncpy +153 drivers//staging/greybus/fw-management.c
013e6653 Viresh Kumar 2016-05-14 138
013e6653 Viresh Kumar 2016-05-14 139 static int fw_mgmt_load_and_validate_operation(struct fw_mgmt *fw_mgmt,
013e6653 Viresh Kumar 2016-05-14 140 u8 load_method, const char *tag)
013e6653 Viresh Kumar 2016-05-14 141 {
013e6653 Viresh Kumar 2016-05-14 142 struct gb_fw_mgmt_load_and_validate_fw_request request;
013e6653 Viresh Kumar 2016-05-14 143 int ret;
013e6653 Viresh Kumar 2016-05-14 144
013e6653 Viresh Kumar 2016-05-14 145 if (load_method != GB_FW_LOAD_METHOD_UNIPRO &&
013e6653 Viresh Kumar 2016-05-14 146 load_method != GB_FW_LOAD_METHOD_INTERNAL) {
013e6653 Viresh Kumar 2016-05-14 147 dev_err(fw_mgmt->parent,
013e6653 Viresh Kumar 2016-05-14 148 "invalid load-method (%d)\n", load_method);
013e6653 Viresh Kumar 2016-05-14 149 return -EINVAL;
013e6653 Viresh Kumar 2016-05-14 150 }
013e6653 Viresh Kumar 2016-05-14 151
013e6653 Viresh Kumar 2016-05-14 152 request.load_method = load_method;
b2abeaa1 Viresh Kumar 2016-08-11 @153 strncpy(request.firmware_tag, tag, GB_FIRMWARE_TAG_MAX_SIZE);
013e6653 Viresh Kumar 2016-05-14 154
013e6653 Viresh Kumar 2016-05-14 155 /*
013e6653 Viresh Kumar 2016-05-14 156 * The firmware-tag should be NULL terminated, otherwise throw error and
013e6653 Viresh Kumar 2016-05-14 157 * fail.
013e6653 Viresh Kumar 2016-05-14 158 */
b2abeaa1 Viresh Kumar 2016-08-11 159 if (request.firmware_tag[GB_FIRMWARE_TAG_MAX_SIZE - 1] != '\0') {
013e6653 Viresh Kumar 2016-05-14 160 dev_err(fw_mgmt->parent, "load-and-validate: firmware-tag is not NULL terminated\n");
013e6653 Viresh Kumar 2016-05-14 161 return -EINVAL;
013e6653 Viresh Kumar 2016-05-14 162 }
013e6653 Viresh Kumar 2016-05-14 163
013e6653 Viresh Kumar 2016-05-14 164 /* Allocate ids from 1 to 255 (u8-max), 0 is an invalid id */
013e6653 Viresh Kumar 2016-05-14 165 ret = ida_simple_get(&fw_mgmt->id_map, 1, 256, GFP_KERNEL);
013e6653 Viresh Kumar 2016-05-14 166 if (ret < 0) {
013e6653 Viresh Kumar 2016-05-14 167 dev_err(fw_mgmt->parent, "failed to allocate request id (%d)\n",
013e6653 Viresh Kumar 2016-05-14 168 ret);
013e6653 Viresh Kumar 2016-05-14 169 return ret;
013e6653 Viresh Kumar 2016-05-14 170 }
013e6653 Viresh Kumar 2016-05-14 171
013e6653 Viresh Kumar 2016-05-14 172 fw_mgmt->intf_fw_request_id = ret;
04f0e6eb Viresh Kumar 2016-05-14 173 fw_mgmt->intf_fw_loaded = false;
013e6653 Viresh Kumar 2016-05-14 174 request.request_id = ret;
013e6653 Viresh Kumar 2016-05-14 175
013e6653 Viresh Kumar 2016-05-14 176 ret = gb_operation_sync(fw_mgmt->connection,
013e6653 Viresh Kumar 2016-05-14 177 GB_FW_MGMT_TYPE_LOAD_AND_VALIDATE_FW, &request,
013e6653 Viresh Kumar 2016-05-14 178 sizeof(request), NULL, 0);
013e6653 Viresh Kumar 2016-05-14 179 if (ret) {
013e6653 Viresh Kumar 2016-05-14 180 ida_simple_remove(&fw_mgmt->id_map,
013e6653 Viresh Kumar 2016-05-14 181 fw_mgmt->intf_fw_request_id);
013e6653 Viresh Kumar 2016-05-14 182 fw_mgmt->intf_fw_request_id = 0;
013e6653 Viresh Kumar 2016-05-14 183 dev_err(fw_mgmt->parent,
013e6653 Viresh Kumar 2016-05-14 184 "load and validate firmware request failed (%d)\n",
013e6653 Viresh Kumar 2016-05-14 185 ret);
013e6653 Viresh Kumar 2016-05-14 186 return ret;
013e6653 Viresh Kumar 2016-05-14 187 }
013e6653 Viresh Kumar 2016-05-14 188
013e6653 Viresh Kumar 2016-05-14 189 return 0;
013e6653 Viresh Kumar 2016-05-14 190 }
013e6653 Viresh Kumar 2016-05-14 191
:::::: The code at line 153 was first introduced by commit
:::::: b2abeaa10d5711e7730bb07120dd60ae27d7b930 greybus: firmware: s/_LEN/_SIZE
:::::: TO: Viresh Kumar <viresh.kumar@...aro.org>
:::::: CC: Greg Kroah-Hartman <gregkh@...gle.com>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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