From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Mark Salter <msalter@redhat.com>, Tony Luck <tony.luck@intel.com>,
David Howells <dhowells@redhat.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Guan Xuetao <gxt@mprc.pku.edu.cn>, Borislav Petkov <bp@alien8.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Vineet Gupta <vgupta@synopsys.com>,
Fengguang Wu <fengguang.wu@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Petr Mladek <pmladek@suse.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-c6x-dev@linux-c6x.org, linux-ia64@vger.kernel.org,
linux-am33-list@redhat.com, linux-sh@vger.kernel.org,
linux-edac@vger.kernel.org, x86@kernel.org,
linux-snps-arc@lists.infradead.org,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Subject: [08/13] x86: do not use print_symbol()
Date: Mon, 11 Dec 2017 21:50:20 +0900 [thread overview]
Message-ID: <20171211125025.2270-9-sergey.senozhatsky@gmail.com> (raw)
print_symbol() uses extra stack space to sprintf() symbol
information and then to feed that buffer to printk()
char buffer[KSYM_SYMBOL_LEN];
sprint_symbol(buffer, address);
printk(fmt, buffer);
Replace print_symbol() with a direct printk("%pS") call.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/cpu/mcheck/mce.c | 3 +--
arch/x86/mm/mmio-mod.c | 5 ++---
2 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index b1d616d08eee..8ca8f6eb32db 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -14,7 +14,6 @@
#include <linux/capability.h>
#include <linux/miscdevice.h>
#include <linux/ratelimit.h>
-#include <linux/kallsyms.h>
#include <linux/rcupdate.h>
#include <linux/kobject.h>
#include <linux/uaccess.h>
@@ -235,7 +234,7 @@ static void __print_mce(struct mce *m)
m->cs, m->ip);
if (m->cs == __KERNEL_CS)
- print_symbol("{%s}", m->ip);
+ pr_cont("{%pS}", (void *)m->ip);
pr_cont("\n");
}
diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index 4d434ddb75db..2c1ecf4763c4 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -29,7 +29,6 @@
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/io.h>
-#include <linux/kallsyms.h>
#include <asm/pgtable.h>
#include <linux/mmiotrace.h>
#include <asm/e820/api.h> /* for ISA_START_ADDRESS */
@@ -123,8 +122,8 @@ static void die_kmmio_nesting_error(struct pt_regs *regs, unsigned long addr)
pr_emerg("unexpected fault for address: 0x%08lx, last fault for address: 0x%08lx\n",
addr, my_reason->addr);
print_pte(addr);
- print_symbol(KERN_EMERG "faulting IP is at %s\n", regs->ip);
- print_symbol(KERN_EMERG "last faulting IP was at %s\n", my_reason->ip);
+ pr_emerg("faulting IP is at %pS\n", (void *)regs->ip);
+ pr_emerg("last faulting IP was at %pS\n", (void *)my_reason->ip);
#ifdef __i386__
pr_emerg("eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
regs->ax, regs->bx, regs->cx, regs->dx);
next reply other threads:[~2017-12-11 12:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-11 12:50 Sergey Senozhatsky [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-12-11 17:45 [08/13] x86: do not use print_symbol() Borislav Petkov
2017-12-12 2:41 Sergey Senozhatsky
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