This pair of changes has not received anything beyond build and boot testing. I am posting these changes as they do a much better job of warning of problems and shutting down the security hole. Making them a much better pattern than the my last patch. I hope to get the test cases soon. arch/alpha/include/asm/thread_info.h | 2 ++ arch/alpha/kernel/entry.S | 62 ++++++++++++++++++++++++++-------- arch/alpha/kernel/process.c | 3 ++ arch/alpha/kernel/ptrace.c | 13 +++++-- arch/alpha/kernel/syscalls/syscall.tbl | 8 ++--- 5 files changed, 67 insertions(+), 21 deletions(-) Eric W. Biederman (2): alpha/ptrace: Record and handle the absence of switch_stack alpha/ptrace: Add missing switch_stack frames