linux-kernel - [REVIEW][PATCH 10/22] signal/nios2: Use force_sig

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Date:   Fri, 20 Apr 2018 09:37:59 -0500
From:   "Eric W. Biederman" <ebiederm@...ssion.com>
To:     linux-arch@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Ley Foon Tan <lftan@...era.com>,
        nios2-dev@...ts.rocketboards.org
Subject: [REVIEW][PATCH 10/22] signal/nios2: Use force_sig_fault where appropriate

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: Ley Foon Tan <lftan@...era.com>
Cc: nios2-dev@...ts.rocketboards.org
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 arch/nios2/kernel/traps.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/nios2/kernel/traps.c b/arch/nios2/kernel/traps.c
index a69861d3e1a3..3bc3cd22b750 100644
--- a/arch/nios2/kernel/traps.c
+++ b/arch/nios2/kernel/traps.c
@@ -26,14 +26,7 @@ static DEFINE_SPINLOCK(die_lock);

 static void _send_sig(int signo, int code, unsigned long addr)
 {
-	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, current);
+	force_sig_fault(signo, code, (void __user *) addr, current);
 }

 void die(const char *str, struct pt_regs *regs, long err)
-- 
2.14.1