en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/arch/riscv/lib/ashrdi3.S#a354b8de9ad607c0a11419a402df46b46503f921 riscv: add platform-specific double word shifts for riscv32Add riscv32-specific '__ashldi3()', '__ashrdi3()', and '__lshrdi3()'. Initially it was intended to fix the following link error observed whenbuilding EFI-enabled kernel with CONFIG_EFI_STUB=y andCONFIG_EFI_GENERIC_STUB=y:riscv32-linux-gnu-ld: ./drivers/firmware/efi/libstub/lib-cmdline.stub.o: in function `__efistub_.L49':__efistub_cmdline.c:(.init.text+0x1f2): undefined reference to `__efistub___ashldi3'riscv32-linux-gnu-ld: __efistub_cmdline.c:(.init.text+0x202): undefined reference to `__efistub___lshrdi3'Reported at [1] trying to buildhttps://patchew.org/linux/20260212164413.889625-1-dmantipov@yandex.ru,tested with 'qemu-system-riscv32 -M virt' only.Link: https://lore.kernel.org/20260519172259.908980-7-dmantipov@yandex.ruSigned-off-by: Dmitry Antipov <dmantipov@yandex.ru>Reported-by: kernel test robot <lkp@intel.com>Closes: https://lore.kernel.org/oe-kbuild-all/202603041925.KLKqpK6N-lkp@intel.com [1]Suggested-by: Ard Biesheuvel <ardb@kernel.org>Tested-by: Charlie Jenkins <thecharlesjenkins@gmail.com>Assisted-by: Gemini:gemini-3.1-pro-preview sashikoCc: Albert Ou <aou@eecs.berkeley.edu>Cc: Alexandre Ghiti <alex@ghiti.fr>Cc: Andriy Shevchenko <andriy.shevchenko@intel.com>Cc: Palmer Dabbelt <palmer@dabbelt.com>Signed-off-by: Andrew Morton <akpm@linux-foundation.org> List of files: /linux/arch/riscv/lib/ashrdi3.S Tue, 19 May 2026 19:22:57 +0200 Dmitry Antipov <dmantipov@yandex.ru>