diff options
author | Jan Beulich <JBeulich@suse.com> | 2012-05-09 08:47:37 +0100 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2012-05-09 11:44:42 +0200 |
commit | 57da8b960b9a25646a8ddb5a9c1d0b5978e69bec (patch) | |
tree | da46e6e57f983389dce36bb6ccdc7ce477cb0ca4 | |
parent | febb72a6e4cc6c8cffcc1ea649a3fb364f1ea432 (diff) | |
download | blackbird-obmc-linux-57da8b960b9a25646a8ddb5a9c1d0b5978e69bec.tar.gz blackbird-obmc-linux-57da8b960b9a25646a8ddb5a9c1d0b5978e69bec.zip |
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.h | 1 | ||||
-rw-r--r-- | arch/x86/kernel/dumpstack.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/dumpstack_32.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/dumpstack_64.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/kprobes.c | 4 | ||||
-rw-r--r-- | arch/x86/kernel/nmi.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/process.c | 6 |
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; |