tm_mctx 1363 arch/powerpc/kernel/signal_32.c struct mcontext __user *tm_mctx = NULL; tm_mctx 1404 arch/powerpc/kernel/signal_32.c tm_mctx = &frame->mctx_transact; tm_mctx 1413 arch/powerpc/kernel/signal_32.c if (save_user_regs(regs, &frame->mctx, tm_mctx, sigret, 1))