[tip:x86/urgent] x86/kasan: Add message about KASAN being initialized

[tip-bot for Andrey Ryabinin <tipbot@zytor.com>]

Commit-ID:  8515522949951d81fe2d06c0a3292f171f2b8ec4
Gitweb:     http://git.kernel.org/tip/8515522949951d81fe2d06c0a3292f171f2b8ec4
Author:     Andrey Ryabinin <a.ryabinin@samsung.com>
AuthorDate: Thu, 2 Jul 2015 12:09:37 +0300
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 6 Jul 2015 14:53:14 +0200

x86/kasan: Add message about KASAN being initialized

Print informational message to tell user that kernel
runs with KASAN enabled.

Add a "kasan: " prefix to all messages in kasan_init_64.c.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Alexander Popov <alpopov@ptsecurity.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1435828178-10975-6-git-send-email-a.ryabinin@samsung.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/mm/kasan_init_64.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index 9a54dbe..e1840f3 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -1,3 +1,4 @@
+#define pr_fmt(fmt) "kasan: " fmt
 #include <linux/bootmem.h>
 #include <linux/kasan.h>
 #include <linux/kdebug.h>
@@ -237,4 +238,6 @@ void __init kasan_init(void)
 	load_cr3(init_level4_pgt);
 	__flush_tlb_all();
 	init_task.kasan_depth = 0;
+
+	pr_info("Kernel address sanitizer initialized\n");
 }