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-rw-r--r--arch/um/kernel/signal.c12
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index ae4658f576..a56b445227 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -121,18 +121,6 @@ void do_signal(struct pt_regs *regs)
}
/*
- * This closes a way to execute a system call on the host. If
- * you set a breakpoint on a system call instruction and singlestep
- * from it, the tracing thread used to PTRACE_SINGLESTEP the process
- * rather than PTRACE_SYSCALL it, allowing the system call to execute
- * on the host. The tracing thread will check this flag and
- * PTRACE_SYSCALL if necessary.
- */
- if (test_thread_flag(TIF_SINGLESTEP))
- current->thread.singlestep_syscall =
- is_syscall(PT_REGS_IP(&current->thread.regs));
-
- /*
* if there's no signal to deliver, we just put the saved sigmask
* back
*/