| Message ID | 20210714091747.2814370-2-morbo@google.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Fix clang -Wunused-but-set-variable warnings | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Guessed tree name to be net-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | warning | 2 maintainers not CCed: gregkh@linuxfoundation.org rafael@kernel.org |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 3 this patch: 3 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 21 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 3 this patch: 3 |
| netdev/header_inline | success | Link |
Hi Bill,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on scsi/for-next]
[also build test WARNING on linux/master driver-core/driver-core-testing mkp-scsi/for-next ipvs/master linus/master v5.14-rc1 next-20210714]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Bill-Wendling/Fix-clang-Wunused-but-set-variable-warnings/20210714-172029
base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next
config: powerpc-redwood_defconfig (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
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
# https://github.com/0day-ci/linux/commit/f6c4b007fc8c907719d883faae424f2cf3bb100c
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Bill-Wendling/Fix-clang-Wunused-but-set-variable-warnings/20210714-172029
git checkout f6c4b007fc8c907719d883faae424f2cf3bb100c
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
drivers/base/module.c: In function 'module_add_driver':
>> drivers/base/module.c:61:2: warning: ignoring return value of 'sysfs_create_link', declared with attribute warn_unused_result [-Wunused-result]
61 | sysfs_create_link(&drv->p->kobj, &mk->kobj, "module");
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/base/module.c:65:3: warning: ignoring return value of 'sysfs_create_link', declared with attribute warn_unused_result [-Wunused-result]
65 | sysfs_create_link(mk->drivers_dir, &drv->p->kobj, driver_name);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/sysfs_create_link +61 drivers/base/module.c
32
33 void module_add_driver(struct module *mod, struct device_driver *drv)
34 {
35 char *driver_name;
36 struct module_kobject *mk = NULL;
37
38 if (!drv)
39 return;
40
41 if (mod)
42 mk = &mod->mkobj;
43 else if (drv->mod_name) {
44 struct kobject *mkobj;
45
46 /* Lookup built-in module entry in /sys/modules */
47 mkobj = kset_find_obj(module_kset, drv->mod_name);
48 if (mkobj) {
49 mk = container_of(mkobj, struct module_kobject, kobj);
50 /* remember our module structure */
51 drv->p->mkobj = mk;
52 /* kset_find_obj took a reference */
53 kobject_put(mkobj);
54 }
55 }
56
57 if (!mk)
58 return;
59
60 /* Don't check return codes; these calls are idempotent */
> 61 sysfs_create_link(&drv->p->kobj, &mk->kobj, "module");
62 driver_name = make_driver_name(drv);
63 if (driver_name) {
64 module_create_drivers_dir(mk);
65 sysfs_create_link(mk->drivers_dir, &drv->p->kobj, driver_name);
66 kfree(driver_name);
67 }
68 }
69
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff --git a/drivers/base/module.c b/drivers/base/module.c index 46ad4d636731..81d84a066a38 100644 --- a/drivers/base/module.c +++ b/drivers/base/module.c @@ -33,7 +33,6 @@ static void module_create_drivers_dir(struct module_kobject *mk) void module_add_driver(struct module *mod, struct device_driver *drv) { char *driver_name; - int no_warn; struct module_kobject *mk = NULL; if (!drv) @@ -59,12 +58,11 @@ void module_add_driver(struct module *mod, struct device_driver *drv) return; /* Don't check return codes; these calls are idempotent */ - no_warn = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module"); + sysfs_create_link(&drv->p->kobj, &mk->kobj, "module"); driver_name = make_driver_name(drv); if (driver_name) { module_create_drivers_dir(mk); - no_warn = sysfs_create_link(mk->drivers_dir, &drv->p->kobj, - driver_name); + sysfs_create_link(mk->drivers_dir, &drv->p->kobj, driver_name); kfree(driver_name); } }
Fix the following build warning: drivers/base/module.c:36:6: error: variable 'no_warn' set but not used [-Werror,-Wunused-but-set-variable] int no_warn; Signed-off-by: Bill Wendling <morbo@google.com> --- drivers/base/module.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)