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x86/dumpstack: Remove unnecessary stack pointer arguments 

When calling show_stack_log_lvl() or dump_trace() with a regs argument,
providing a stack pointer or frame pointer is redundant.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>d
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nilay Vaish <nilayvaish@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1694e2e955e3b9a73a3c3d5ba2634344014dd550.1472057064.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Josh Poimboeuf 2016-08-24 11:50:18 -05:00 committed by Ingo Molnar
parent 4b8afafbe7
commit 5a8ff54c26
4 changed files with 4 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kernel/dumpstack.c
View File

@ -185,7 +185,7 @@ void show_stack(struct task_struct *task, unsigned long *sp)
void show_stack_regs(struct pt_regs *regs)
{
show_stack_log_lvl(current, regs, (unsigned long *)regs->sp, regs->bp, "");
show_stack_log_lvl(current, regs, NULL, 0, "");
}
static arch_spinlock_t die_lock = __ARCH_SPIN_LOCK_UNLOCKED;

2
arch/x86/kernel/dumpstack_32.c
View File

@ -122,7 +122,7 @@ void show_regs(struct pt_regs *regs)
u8 *ip;
pr_emerg("Stack:\n");
show_stack_log_lvl(NULL, regs, &regs->sp, 0, KERN_EMERG);
show_stack_log_lvl(NULL, regs, NULL, 0, KERN_EMERG);
pr_emerg("Code:");

5
arch/x86/kernel/dumpstack_64.c
View File

@ -283,9 +283,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
void show_regs(struct pt_regs *regs)
{
int i;
unsigned long sp;
sp = regs->sp;
show_regs_print_info(KERN_DEFAULT);
__show_regs(regs, 1);
@ -300,8 +298,7 @@ void show_regs(struct pt_regs *regs)
u8 *ip;
printk(KERN_DEFAULT "Stack:\n");
show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
0, KERN_DEFAULT);
show_stack_log_lvl(NULL, regs, NULL, 0, KERN_DEFAULT);
printk(KERN_DEFAULT "Code: ");

5
arch/x86/oprofile/backtrace.c
View File

@ -113,8 +113,6 @@ x86_backtrace(struct pt_regs * const regs, unsigned int depth)
struct stack_frame *head = (struct stack_frame *)frame_pointer(regs);
if (!user_mode(regs)) {
unsigned long stack = kernel_stack_pointer(regs);
if (!depth)
return;
@ -122,8 +120,7 @@ x86_backtrace(struct pt_regs * const regs, unsigned int depth)
if (!--depth)
return;
dump_trace(NULL, regs, (unsigned long *)stack, 0,
&backtrace_ops, &depth);
dump_trace(NULL, regs, NULL, 0, &backtrace_ops, &depth);
return;
}