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UPSTREAM: printk: when dumping regs, show the stack, not thread_info

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We currently show:

  task: <current> ti: <current_thread_info()> task.ti: <task_thread_info(current)>"

"ti" and "task.ti" are redundant, and neither is actually what we want
to show, which the the base of the thread stack.  Change the display to
show the stack pointer explicitly.

Link: http://lkml.kernel.org/r/543ac5bd66ff94000a57a02e11af7239571a3055.1468523549.git.luto@kernel.org
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Bug: 38331309
Change-Id: I7d4b915d38770d0c9384695b2064e4c66b22e94e
(cherry picked from commit 8b70ca6561)
Signed-off-by: Zubin Mithra <zsm@google.com>
This commit is contained in:
Andy Lutomirski 2016-07-28 15:48:23 -07:00 • committed by Amit Pundir
commit 06fbb2a494
1 changed files with 2 additions and 3 deletions
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5
kernel/printk/printk.c
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@ -3176,9 +3176,8 @@ void show_regs_print_info(const char *log_lvl)
{
dump_stack_print_info(log_lvl);
printk("%stask: %p ti: %p task.ti: %p\n",
log_lvl, current, current_thread_info(),
task_thread_info(current));
printk("%stask: %p task.stack: %p\n",
log_lvl, current, task_stack_page(current));
}
#endif