ptrace: Remove the unnecessary arguments from arch_ptrace_stop

Both arch_ptrace_stop_needed and arch_ptrace_stop are called with an
exit_code and a siginfo structure.  Neither argument is used by any of
the implementations so just remove the unneeded arguments.

The two arechitectures that implement arch_ptrace_stop are ia64 and
sparc.  Both architectures flush their register stacks before a
ptrace_stack so that all of the register information can be accessed
by debuggers.

As the question of if a register stack needs to be flushed is
independent of why ptrace is stopping not needing arguments make sense.

Cc: David Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Link: https://lkml.kernel.org/r/87lf3mx290.fsf@disp2133
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index 9f2dc9cf3208..c9759ff2cb43 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2200,7 +2200,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t
 {
 	bool gstop_done = false;
 
-	if (arch_ptrace_stop_needed(exit_code, info)) {
+	if (arch_ptrace_stop_needed()) {
 		/*
 		 * The arch code has something special to do before a
 		 * ptrace stop.  This is allowed to block, e.g. for faults
@@ -2210,7 +2210,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t
 		 * any signal bookkeeping like checking group_stop_count.
 		 */
 		spin_unlock_irq(&current->sighand->siglock);
-		arch_ptrace_stop(exit_code, info);
+		arch_ptrace_stop();
 		spin_lock_irq(&current->sighand->siglock);
 	}