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From:   "Eric W. Biederman" <ebiederm@xmission.com>
To:     linux-arch@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Palmer Dabbelt <palmer@sifive.com>,
        Albert Ou <albert@sifive.com>, linux-riscv@lists.infradead.org
Date:   Fri, 20 Apr 2018 09:38:03 -0500
Message-Id: <20180420143811.9994-14-ebiederm@xmission.com>
In-Reply-To: <87604mhrnb.fsf@xmission.com>
References: <87604mhrnb.fsf@xmission.com>
Subject: [REVIEW][PATCH 14/22] signal/riscv: Use force_sig_fault where appropriate
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Filling in struct siginfo before calling force_sig_info a tedious and
error prone process, where once in a great while the wrong fields
are filled out, and siginfo has been inconsistently cleared.

Simplify this process by using the helper force_sig_fault.  Which
takes as a parameters all of the information it needs, ensures
all of the fiddly bits of filling in struct siginfo are done properly
and then calls force_sig_info.

In short about a 5 line reduction in code for every time force_sig_info
is called, which makes the calling function clearer.

Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Albert Ou <albert@sifive.com>
Cc: linux-riscv@lists.infradead.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
 arch/riscv/kernel/traps.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 48aa6471cede..3087940008f4 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -66,14 +66,7 @@ void die(struct pt_regs *regs, const char *str)
 static inline void do_trap_siginfo(int signo, int code,
 	unsigned long addr, struct task_struct *tsk)
 {
-	siginfo_t info;
-
-	clear_siginfo(&info);
-	info.si_signo = signo;
-	info.si_errno = 0;
-	info.si_code = code;
-	info.si_addr = (void __user *)addr;
-	force_sig_info(signo, &info, tsk);
+	force_sig_fault(signo, code, (void __user *)addr, tsk);
 }
 
 void do_trap(struct pt_regs *regs, int signo, int code,
-- 
2.14.1