linux-kernel - [PATCH v2] arch/x86: get rid of KERN_CONT in show_fault

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Date:   Mon, 25 Jun 2018 14:38:08 +0200
From:   Dmitry Vyukov <dvyukov@...il.com>
To:     tglx@...utronix.de, mingo@...hat.com, x86@...nel.org,
        linux-kernel@...r.kernel.org, sergey.senozhatsky.work@...il.com
Cc:     Dmitry Vyukov <dvyukov@...gle.com>
Subject: [PATCH v2] arch/x86: get rid of KERN_CONT in show_fault_oops()

From: Dmitry Vyukov <dvyukov@...gle.com>

KERN_CONT leads to split lines in kernel output
and complicates useful changes to printk like
printing context before each line.

Only acceptable use of continuations is basically
boot-time testing.

Get rid of it.

Signed-off-by: Dmitry Vyukov <dvyukov@...gle.com>

---

Changes since v1:
 - use pr_alert() instead of printk(KERN_ALERT)
---
 arch/x86/mm/fault.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 9a84a0d08727..b9ceeaadde48 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -671,13 +671,9 @@ show_fault_oops(struct pt_regs *regs, unsigned long error_code,
 			printk(smep_warning, from_kuid(&init_user_ns, current_uid()));
 	}
 
-	printk(KERN_ALERT "BUG: unable to handle kernel ");
-	if (address < PAGE_SIZE)
-		printk(KERN_CONT "NULL pointer dereference");
-	else
-		printk(KERN_CONT "paging request");
-
-	printk(KERN_CONT " at %px\n", (void *) address);
+	pr_alert("BUG: unable to handle kernel %s at %px\n",
+		(address < PAGE_SIZE ? "NULL pointer dereference" :
+		"paging request"), (void *) address);
 
 	dump_pagetable(address);
 }
-- 
2.18.0.rc2.346.g013aa6912e-goog