From: Jisheng Zhang jszhang@kernel.org
commit 74f6bb55c834da6d4bac24f44868202743189b2b upstream.
lkp reported a build error, I tried the config and can reproduce build error as below:
VDSOLD arch/riscv/kernel/vdso/vdso.so.dbg ld.lld: error: section .note file range overlaps with .text
.note range is [0x7C8, 0x803] .text range is [0x800, 0x1993]
ld.lld: error: section .text file range overlaps with .dynamic
.text range is [0x800, 0x1993] .dynamic range is [0x808, 0x937]
ld.lld: error: section .note virtual address range overlaps with .text
.note range is [0x7C8, 0x803] .text range is [0x800, 0x1993]
Fix it by setting DISABLE_BRANCH_PROFILING which will disable branch tracing for vdso, thus avoid useless _ftrace_annotated_branch section and _ftrace_branch section. Although we can also fix it by removing the hardcoded .text begin address, but I think that's another story and should be put into another patch.
Link: https://lore.kernel.org/lkml/202210122123.Cc4FPShJ-lkp@intel.com/#r Reported-by: kernel test robot lkp@intel.com Signed-off-by: Jisheng Zhang jszhang@kernel.org Link: https://lore.kernel.org/r/20221102170254.1925-1-jszhang@kernel.org Fixes: ad5d1122b82f ("riscv: use vDSO common flow to reduce the latency of the time-related functions") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt palmer@rivosinc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/riscv/kernel/vdso/Makefile | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile index db6548509bb3..06e6b27f3bcc 100644 --- a/arch/riscv/kernel/vdso/Makefile +++ b/arch/riscv/kernel/vdso/Makefile @@ -17,6 +17,7 @@ vdso-syms += flush_icache obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
ccflags-y := -fno-stack-protector +ccflags-y += -DDISABLE_BRANCH_PROFILING
ifneq ($(c-gettimeofday-y),) CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y)