Starting with linux commit v4.0-rc4~21^2, "SP" register is available via regs[PTR_SP] member of struct user_pt_regs. * linux/nios2/arch_regs.h (nios2_sp_ptr): Change type to "unsigned int *". * linux/nios2/arch_regs.c (nios2_sp_ptr): Likewise. Replace .sp with .regs[PTR_SP]. Fixes: http://autobuild.buildroot.net/results/b9f/b9fc25b82f3280872fe1593ac252a8529ba83576 Fixes: v4.16-34-g6117728a ("nios2: export nios2_sp_ptr") Signed-off-by: Romain Naour <romain.naour@smile.fr> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>