signal: Remove the signal number and task parameters from force_sig_info

force_sig_info always delivers to the current task and the signal
parameter always matches info.si_signo.  So remove those parameters to
make it a simpler less error prone interface, and to make it clear
that none of the callers are doing anything clever.

This guarantees that force_sig_info will not grow any new buggy
callers that attempt to call force_sig on a non-current task, or that
pass an signal number that does not match info.si_signo.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index d5084ebd9f03..2a9df80ea887 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -355,7 +355,7 @@ static inline void user_single_step_report(struct pt_regs *regs)
         info.si_code = SI_USER;
         info.si_pid = 0;
         info.si_uid = 0;
-        force_sig_info(info.si_signo, &info, current);
+        force_sig_info(&info);
 }
 #endif
 
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 7f872506e1de..532458698bde 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -329,7 +329,7 @@ int force_sig_ptrace_errno_trap(int errno, void __user *addr);
 
 extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *);
 extern void force_sigsegv(int sig);
-extern int force_sig_info(int, struct kernel_siginfo *, struct task_struct *);
+extern int force_sig_info(struct kernel_siginfo *);
 extern int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp);
 extern int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid);
 extern int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr, struct pid *,