Following clang-17 build failures noticed on Linux next-20230810
Build log:
-------
make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=arm64
CROSS_COMPILE=aarch64-linux-gnu- 'HOSTCC=sccache clang' 'CC=sccache
clang' LLVM=1 LLVM_IAS=1
drivers/video/backlight/lp855x_bl.c:252:11: warning: variable 'ret' is
used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
252 | else if (lp->mode == REGISTER_BASED)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/video/backlight/lp855x_bl.c:256:9: note: uninitialized use occurs here
256 | return ret;
| ^~~
drivers/video/backlight/lp855x_bl.c:252:7: note: remove the 'if' if
its condition is always true
252 | else if (lp->mode == REGISTER_BASED)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
253 | ret = lp855x_write_byte(lp, lp->cfg->reg_brightness,
drivers/video/backlight/lp855x_bl.c:244:9: note: initialize the
variable 'ret' to silence this warning
244 | int ret;
| ^
| = 0
1 warning generated.
fs/btrfs/extent_io.c:232:16: warning: variable 'pages_processed' set
but not used [-Wunused-but-set-variable]
232 | unsigned long pages_processed = 0;
| ^
1 warning generated.
drivers/gpu/drm/nouveau/nouveau_exec.c:114:4: error: cannot jump from
this indirect goto statement to one of its possible targets
114 | drm_exec_retry_on_contention(exec);
| ^
include/drm/drm_exec.h:96:4: note: expanded from macro
'drm_exec_retry_on_contention'
96 | goto *__drm_exec_retry_ptr; \
| ^
drivers/gpu/drm/nouveau/nouveau_exec.c:106:2: note: possible target of
indirect goto statement
106 | drm_exec_until_all_locked(exec) {
| ^
include/drm/drm_exec.h:79:33: note: expanded from macro
'drm_exec_until_all_locked'
79 | __label__ __drm_exec_retry; \
| ^
drivers/gpu/drm/nouveau/nouveau_exec.c:106:2: note: jump enters a
statement expression
include/drm/drm_exec.h:78:35: note: expanded from macro
'drm_exec_until_all_locked'
78 | for (void *__drm_exec_retry_ptr; ({ \
| ^
1 error generated.
make[7]: *** [scripts/Makefile.build:243:
drivers/gpu/drm/nouveau/nouveau_exec.o] Error 1
drivers/gpu/drm/nouveau/nouveau_uvmm.c:1305:5: error: cannot jump from
this indirect goto statement to one of its possible targets
1305 | drm_exec_retry_on_contention(exec);
| ^
include/drm/drm_exec.h:96:4: note: expanded from macro
'drm_exec_retry_on_contention'
96 | goto *__drm_exec_retry_ptr; \
| ^
drivers/gpu/drm/nouveau/nouveau_uvmm.c:1291:2: note: possible target
of indirect goto statement
1291 | drm_exec_until_all_locked(exec) {
| ^
include/drm/drm_exec.h:79:33: note: expanded from macro
'drm_exec_until_all_locked'
79 | __label__ __drm_exec_retry; \
| ^
drivers/gpu/drm/nouveau/nouveau_uvmm.c:1291:2: note: jump enters a
statement expression
include/drm/drm_exec.h:78:35: note: expanded from macro
'drm_exec_until_all_locked'
78 | for (void *__drm_exec_retry_ptr; ({ \
| ^
1 error generated.
make[7]: *** [scripts/Makefile.build:243:
drivers/gpu/drm/nouveau/nouveau_uvmm.o] Error 1
Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
Links:
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230809/testrun/18940123/suite/build/test/clang-17-lkftconfig/log
- https://storage.tuxsuite.com/public/linaro/lkft/builds/2TjhxEjDSquzvxYvC8eD8VWx9dV/
Steps to reproduce:
tuxmake --runtime podman --target-arch arm64 --toolchain clang-17
--kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2TjhxEjDSquzvxYvC8eD8VWx9dV/config
LLVM=1 LLVM_IAS=1
https://storage.tuxsuite.com/public/linaro/lkft/builds/2TjhxEjDSquzvxYvC8eD8VWx9dV/tuxmake_reproducer.sh
--
Linaro LKFT
https://lkft.linaro.org
