modpost: skip section mismatch warnings on ELF local symbols by default modpost, by default, reports section mismatch warnings on ELF local symbols. This caused false positive warnings to be reported for a local symbol name that would otherwise be elided by matching against a name pattern. This was observed using a RISC-V toolchain that generates section anchors. To avoid this noise in the common case, this patch series disables section mismatch warnings on ELF local symbols by default. It also adds a modpost command line switch to re-enable these warnings, since I wasn't able to convince myself that section mismatch warnings on ELF local symbols were completely useless; just mostly useless :-) I'm neither a modpost nor an ELF expert, so careful review of this series is appreciated. This modpost series can also be found at: https://github.com/sifive/riscv-linux/tree/dev/paulw/modpost-elf-local-symbols-v4.19-rc7 The series was tested on a RISC-V build of the SiFive UART serial driver, at: https://github.com/sifive/riscv-linux/tree/dev/paulw/serial-v4.19-rc7 Paul Walmsley (2): modpost: add switch to skip symbol exclusions likely to generate false positives modpost: skip ELF local symbols by default during section mismatch check scripts/mod/modpost.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) Cc: Russell King <linux@xxxxxxxxxxxxxxx> Cc: Jim Wilson <jimw@xxxxxxxxxx> Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> Cc: Michal Marek <michal.lkml@xxxxxxxxxxx> Cc: linux-kbuild@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx -- 2.19.1
