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authorJan Beulich <JBeulich@suse.com>2012-05-09 08:47:37 +0100
committerIngo Molnar <mingo@kernel.org>2012-05-09 11:44:42 +0200
commit57da8b960b9a25646a8ddb5a9c1d0b5978e69bec (patch)
treeda46e6e57f983389dce36bb6ccdc7ce477cb0ca4
parentfebb72a6e4cc6c8cffcc1ea649a3fb364f1ea432 (diff)
downloadblackbird-obmc-linux-57da8b960b9a25646a8ddb5a9c1d0b5978e69bec.tar.gz
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x86: Avoid double stack traces with show_regs()
What was called show_registers() so far already showed a stack trace for kernel faults, and kernel_stack_pointer() isn't even valid to be used for faults from user mode, hence it was pointless for show_regs() to call show_trace() after show_registers(). Simply rename show_registers() to show_regs() and eliminate the old definition. Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/4FAA3D3902000078000826E1@nat28.tlf.novell.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--arch/x86/include/asm/kdebug.h1
-rw-r--r--arch/x86/kernel/dumpstack.c2
-rw-r--r--arch/x86/kernel/dumpstack_32.c2
-rw-r--r--arch/x86/kernel/dumpstack_64.c2
-rw-r--r--arch/x86/kernel/kprobes.c4
-rw-r--r--arch/x86/kernel/nmi.c2
-rw-r--r--arch/x86/kernel/process.c6
7 files changed, 6 insertions, 13 deletions
diff --git a/arch/x86/include/asm/kdebug.h b/arch/x86/include/asm/kdebug.h
index d73f1571bde7..2c37aadcbc35 100644
--- a/arch/x86/include/asm/kdebug.h
+++ b/arch/x86/include/asm/kdebug.h
@@ -24,7 +24,6 @@ enum die_val {
extern void printk_address(unsigned long address, int reliable);
extern void die(const char *, struct pt_regs *,long);
extern int __must_check __die(const char *, struct pt_regs *, long);
-extern void show_registers(struct pt_regs *regs);
extern void show_trace(struct task_struct *t, struct pt_regs *regs,
unsigned long *sp, unsigned long bp);
extern void __show_regs(struct pt_regs *regs, int all);
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 1b81839b6c88..40989da4bb22 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -271,7 +271,7 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err)
current->thread.trap_nr, SIGSEGV) == NOTIFY_STOP)
return 1;
- show_registers(regs);
+ show_regs(regs);
#ifdef CONFIG_X86_32
if (user_mode_vm(regs)) {
sp = regs->sp;
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index 88ec9129271d..e0b1d783daab 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -82,7 +82,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
}
-void show_registers(struct pt_regs *regs)
+void show_regs(struct pt_regs *regs)
{
int i;
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 17107bd6e1f0..791b76122aa8 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -245,7 +245,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
show_trace_log_lvl(task, regs, sp, bp, log_lvl);
}
-void show_registers(struct pt_regs *regs)
+void show_regs(struct pt_regs *regs)
{
int i;
unsigned long sp;
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index e213fc8408d2..e2f751efb7b1 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -1037,9 +1037,9 @@ int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
"current sp %p does not match saved sp %p\n",
stack_addr(regs), kcb->jprobe_saved_sp);
printk(KERN_ERR "Saved registers for jprobe %p\n", jp);
- show_registers(saved_regs);
+ show_regs(saved_regs);
printk(KERN_ERR "Current registers\n");
- show_registers(regs);
+ show_regs(regs);
BUG();
}
*regs = kcb->jprobe_saved_regs;
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 47acaf319165..03c134544966 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -244,7 +244,7 @@ io_check_error(unsigned char reason, struct pt_regs *regs)
pr_emerg(
"NMI: IOCK error (debug interrupt?) for reason %02x on CPU %d.\n",
reason, smp_processor_id());
- show_registers(regs);
+ show_regs(regs);
if (panic_on_io_nmi)
panic("NMI IOCK error: Not continuing");
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 1d92a5ab6e8b..856d5bcae5b2 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -105,12 +105,6 @@ void exit_thread(void)
}
}
-void show_regs(struct pt_regs *regs)
-{
- show_registers(regs);
- show_trace(NULL, regs, (unsigned long *)kernel_stack_pointer(regs), 0);
-}
-
void show_regs_common(void)
{
const char *vendor, *product, *board;
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