(Resending since Gmail mobile client converts email to HTML)
Hi Stephen,
On Tue, Oct 22, 2019 at 4:53 AM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Hi all,
>
> After merging the thermal tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
>
> In file included from drivers/thermal/qcom/tsens-common.c:13:
> drivers/thermal/qcom/tsens-common.c: In function 'tsens_set_interrupt':
> include/linux/regmap.h:87:2: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized]
> 87 | regmap_field_update_bits_base(field, ~0, val, NULL, false, false)
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/thermal/qcom/tsens-common.c:183:6: note: 'index' was declared here
> 183 | u32 index;
> | ^~~~~
> In file included from drivers/thermal/qcom/tsens-common.c:13:
> include/linux/regmap.h:87:2: warning: 'index_clear' may be used uninitialized in this function [-Wmaybe-uninitialized]
> 87 | regmap_field_update_bits_base(field, ~0, val, NULL, false, false)
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/thermal/qcom/tsens-common.c:199:18: note: 'index_clear' was declared here
> 199 | u32 index_mask, index_clear;
> | ^~~~~~~~~~~
> drivers/thermal/qcom/tsens-common.c:199:6: warning: 'index_mask' may be used uninitialized in this function [-Wmaybe-uninitialized]
> 199 | u32 index_mask, index_clear;
> | ^~~~~~~~~~
>
> Introduced by commit
>
> fbfe1a042cfd ("drivers: thermal: tsens: Add interrupt support")
>
What compiler version do you use? Any additional flags to make? I'm
not seeing this, even with W=1.
$ make -k -j`nproc` O=~/work/builds/build-x86/ allmodconfig
$ touch drivers/thermal/qcom/*
──• amit@matterhorn •───(~/.../sources/linux-amit.git) $ make -k
-j`nproc` O=~/work/builds/build-x86/
make[1]: Entering directory '/home/amit/work/builds/build-x86'
GEN Makefile
scripts/kconfig/conf --syncconfig Kconfig
GEN Makefile
DESCEND objtool
CALL /home/amit/work/sources/linux-amit.git/scripts/atomic/check-atomics.sh
CALL /home/amit/work/sources/linux-amit.git/scripts/checksyscalls.sh
CHK include/generated/compile.h
CHK kernel/kheaders_data.tar.xz
CC [M] drivers/thermal/qcom/tsens.o
CC [M] drivers/thermal/qcom/tsens-common.o
CC [M] drivers/thermal/qcom/tsens-v0_1.o
CC [M] drivers/thermal/qcom/tsens-8960.o
CC [M] drivers/thermal/qcom/tsens-v2.o
CC [M] drivers/thermal/qcom/tsens-v1.o
CC [M] drivers/thermal/qcom/qcom-spmi-temp-alarm.o
LD [M] drivers/thermal/qcom/qcom_tsens.o
Building modules, stage 2.
MODPOST 7437 modules
Kernel: arch/x86/boot/bzImage is ready (#3)
LD [M] drivers/thermal/qcom/qcom-spmi-temp-alarm.ko
LD [M] drivers/thermal/qcom/qcom_tsens.ko
make[1]: Leaving directory '/home/amit/work/builds/build-x86'
