Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
To:     linux-kernel@vger.kernel.org
Cc:     "Alastair D'Silva" <alastair@d-silva.org>,
        Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
        Balbir Singh <bsingharora@gmail.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Christophe Leroy <christophe.leroy@c-s.fr>,
        Cyril Bur <cyrilbur@gmail.com>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
        Joe Perches <joe@perches.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Michael Neuling <mikey@neuling.org>,
        Murilo Opsfelder Araujo <muriloo@linux.ibm.com>,
        Nicholas Piggin <npiggin@gmail.com>,
        Paul Mackerras <paulus@samba.org>,
        Simon Guo <wei.guo.simon@gmail.com>,
        Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
        "Tobin C . Harding" <me@tobin.cc>, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v3 3/9] powerpc/traps: Use %lx format in show_signal_msg()
Date:   Tue, 31 Jul 2018 11:50:14 -0300
In-Reply-To: <20180731145020.14009-1-muriloo@linux.ibm.com>
References: <20180731145020.14009-1-muriloo@linux.ibm.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Message-Id: <20180731145020.14009-4-muriloo@linux.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Use %lx format to print registers.  This avoids having two different
formats and avoids checking for MSR_64BIT, improving readability of the
function.

Even though we could have used %px, which is functionally equivalent to %lx
as per Documentation/core-api/printk-formats.rst, it is not semantically
correct because the data printed are not pointers.  And using %px requires
casting data to (void *).

Besides that, %lx matches the format used in show_regs().

Before this patch:

  pandafault[4808]: unhandled signal 11 at 0000000010000718 nip 0000000010000574 lr 00007fff935e7a6c code 2

After this patch:

  pandafault[4732]: unhandled signal 11 at 10000718 nip 10000574 lr 7fff86697a6c code 2

Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
---
 arch/powerpc/kernel/traps.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 4faab4705774..fd4e0648a2d2 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -311,17 +311,12 @@ static bool show_unhandled_signals_ratelimited(void)
 static void show_signal_msg(int signr, struct pt_regs *regs, int code,
 			    unsigned long addr)
 {
-	const char fmt32[] = KERN_INFO "%s[%d]: unhandled signal %d " \
-		"at %08lx nip %08lx lr %08lx code %x\n";
-	const char fmt64[] = KERN_INFO "%s[%d]: unhandled signal %d " \
-		"at %016lx nip %016lx lr %016lx code %x\n";
-
 	if (!unhandled_signal(current, signr))
 		return;
 
-	printk(regs->msr & MSR_64BIT ? fmt64 : fmt32,
-	       current->comm, current->pid, signr,
-	       addr, regs->nip, regs->link, code);
+	pr_info("%s[%d]: unhandled signal %d at %lx nip %lx lr %lx code %x\n",
+		current->comm, current->pid, signr,
+		addr, regs->nip, regs->link, code);
 }
 
 void _exception_pkey(int signr, struct pt_regs *regs, int code,
-- 
2.17.1