linux-kernel - [PATCH v3 01/17] signal: make force

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Message-Id: <20180602103653.18181-2-christian@brauner.io>
Date:   Sat,  2 Jun 2018 12:36:37 +0200
From:   Christian Brauner <christian@...uner.io>
To:     linux-kernel@...r.kernel.org
Cc:     ebiederm@...ssion.com, gregkh@...uxfoundation.org,
        mingo@...nel.org, james.morris@...rosoft.com,
        keescook@...omium.org, peterz@...radead.org, sds@...ho.nsa.gov,
        viro@...iv.linux.org.uk, akpm@...ux-foundation.org,
        oleg@...hat.com, Christian Brauner <christian@...uner.io>
Subject: [PATCH v3 01/17] signal: make force_sigsegv() void

force_sigsegv() returned 0 unconditionally so it doesn't make sense to have
it return at all. In addition, there are no callers that check
force_sigsegv()'s return value.

Signed-off-by: Christian Brauner <christian@...uner.io>
---
v2->v3:
* unchanged
v1->v2:
* unchanged
v0->v1:
* unchanged
---
 include/linux/sched/signal.h | 2 +-
 kernel/signal.c              | 7 ++-----
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 113d1ad1ced7..e138ac16c650 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -314,7 +314,7 @@ int force_sig_pkuerr(void __user *addr, u32 pkey);
 int force_sig_ptrace_errno_trap(int errno, void __user *addr);
 
 extern int send_sig_info(int, struct siginfo *, struct task_struct *);
-extern int force_sigsegv(int, struct task_struct *);
+extern void force_sigsegv(int sig, struct task_struct *p);
 extern int force_sig_info(int, struct siginfo *, struct task_struct *);
 extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
 extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
diff --git a/kernel/signal.c b/kernel/signal.c
index 9c33163a6165..c756008d589e 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1468,8 +1468,7 @@ send_sig(int sig, struct task_struct *p, int priv)
 	return send_sig_info(sig, __si_special(priv), p);
 }
 
-void
-force_sig(int sig, struct task_struct *p)
+void force_sig(int sig, struct task_struct *p)
 {
 	force_sig_info(sig, SEND_SIG_PRIV, p);
 }
@@ -1480,8 +1479,7 @@ force_sig(int sig, struct task_struct *p)
  * the problem was already a SIGSEGV, we'll want to
  * make sure we don't even try to deliver the signal..
  */
-int
-force_sigsegv(int sig, struct task_struct *p)
+void force_sigsegv(int sig, struct task_struct *p)
 {
 	if (sig == SIGSEGV) {
 		unsigned long flags;
@@ -1490,7 +1488,6 @@ force_sigsegv(int sig, struct task_struct *p)
 		spin_unlock_irqrestore(&p->sighand->siglock, flags);
 	}
 	force_sig(SIGSEGV, p);
-	return 0;
 }
 
 int force_sig_fault(int sig, int code, void __user *addr
-- 
2.17.0