Hi Ralf, your commit 23c59ee7e541 ("MIPS: Add uprobes support.") is in today's linux-next tree (i.e., next-20150731) and it adds the following lines of code to arch/mips/kernel/ptrace.c: +#ifdef CONFIG_MIPS_MT_SMTC + REG_OFFSET_NAME(c0_tcstatus, cp0_tcstatus), +#endif The Kconfig option MIPS_MT_SMTC has been removed by commit b633648c5ad3 ("MIPS: MT: Remove SMTC support") so that the upper #ifdef block cannot be compiled. Is this intentional or can the block be removed or should the option be substituted to something else? I detected the issue with scripts/checkkconfigsymbols.py. Kind regards, Valentin