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Fangrui Song authored
arm64 references the start address of .builtin_fw (__start_builtin_fw) with a pair of R_AARCH64_ADR_PREL_PG_HI21/R_AARCH64_LDST64_ABS_LO12_NC relocations. The compiler is allowed to emit the R_AARCH64_LDST64_ABS_LO12_NC relocation because struct builtin_fw in include/linux/firmware.h is 8-byte aligned. The R_AARCH64_LDST64_ABS_LO12_NC relocation requires the address to be a multiple of 8, which may not be the case if .builtin_fw is empty. Unconditionally align .builtin_fw to fix the linker error. 32-bit architectures could use ALIGN(4) but that would add unnecessary complexity, so just use ALIGN(8). Link: https://lkml.kernel.org/r/20201208054646.2913063-1-maskray@google.com Link: https://github.com/ClangBuiltLinux/linux/issues/1204 Fixes: 5658c769 ("firmware: allow firmware files to be built into kernel image") Signed-off-by:
Fangrui Song <maskray@google.com> Reported-by:
kernel test robot <lkp@intel.com> Acked-by:
Arnd Bergmann <arnd@arndb.de> Reviewed-by:
Nick Desaulniers <ndesaulniers@google.com> Tested-by:
Nick Desaulniers <ndesaulniers@google.com> Tested-by:
Douglas Anderson <dianders@chromium.org> Acked-by:
Nathan Chancellor <nathan@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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