diff options
| author |   Christian Marangi <ansuelsmth@gmail.com> | 2025-01-20 16:38:09 +0100 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2025-01-21 10:45:24 +0100 |
| commit | 885f5669f2abd0db34c9832259f77240d5350e36 (patch) | |
| tree | 832243a7e1f4a771d6a4fe56032584a0b74d457c | |
| parent | pmdomain: arm: scmi_pm_domain: Send an explicit request to set the current state (diff) | |
| download | wireguard-linux-885f5669f2abd0db34c9832259f77240d5350e36.tar.xz wireguard-linux-885f5669f2abd0db34c9832259f77240d5350e36.zip | |
pmdomain: airoha: Fix compilation error with Clang-20 and Thumb2 mode
The use of R7 in the SMCCC conflicts with the compiler's use of R7 as a frame
pointer in Thumb2 mode, which is forcibly enabled by Clang when profiling
hooks are inserted via the -pg switch.
This is a known issue and similar driver workaround this with a Makefile
ifdef. Exact workaround are applied in
drivers/firmware/arm_scmi/transports/Makefile and other similar driver.
Suggested-by: Sudeep Holla <sudeep.holla@arm.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202501201840.XmpHXpQ4-lkp@intel.com/
Fixes: 82e703dd438b ("pmdomain: airoha: Add Airoha CPU PM Domain support")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20250120153817.11807-1-ansuelsmth@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/pmdomain/mediatek/Makefile | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/pmdomain/mediatek/Makefile b/drivers/pmdomain/mediatek/Makefile index 0f6edce9239b..18ba92e3c418 100644 --- a/drivers/pmdomain/mediatek/Makefile +++ b/drivers/pmdomain/mediatek/Makefile @@ -2,3 +2,10 @@ obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o obj-$(CONFIG_MTK_SCPSYS_PM_DOMAINS) += mtk-pm-domains.o obj-$(CONFIG_AIROHA_CPU_PM_DOMAIN) += airoha-cpu-pmdomain.o + +ifeq ($(CONFIG_THUMB2_KERNEL)$(CONFIG_CC_IS_CLANG),yy) +# The use of R7 in the SMCCC conflicts with the compiler's use of R7 as a frame +# pointer in Thumb2 mode, which is forcibly enabled by Clang when profiling +# hooks are inserted via the -pg switch. +CFLAGS_REMOVE_airoha-cpu-pmdomain.o += $(CC_FLAGS_FTRACE) +endif |