From c3bdf2e11a10ea804d69a6d1ba1e8a061efb0fa8 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Mon, 27 Jun 2016 07:57:21 +0200 Subject: s390: stack address vs thread_info Avoid using the address of a process' thread_info structure as the kernel stack address. This will break as soon as the thread_info structure will be removed from the stack, and in addition it makes the code a bit more understandable. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/dumpstack.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) (limited to 'arch/s390/kernel/dumpstack.c') diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c index 69f9908ac44c..6693383bc01b 100644 --- a/arch/s390/kernel/dumpstack.c +++ b/arch/s390/kernel/dumpstack.c @@ -78,14 +78,10 @@ void dump_trace(dump_trace_func_t func, void *data, struct task_struct *task, sp = __dump_trace(func, data, sp, S390_lowcore.async_stack + frame_size - ASYNC_SIZE, S390_lowcore.async_stack + frame_size); - if (task) - __dump_trace(func, data, sp, - (unsigned long)task_stack_page(task), - (unsigned long)task_stack_page(task) + THREAD_SIZE); - else - __dump_trace(func, data, sp, - S390_lowcore.thread_info, - S390_lowcore.thread_info + THREAD_SIZE); + task = task ?: current; + __dump_trace(func, data, sp, + (unsigned long)task_stack_page(task), + (unsigned long)task_stack_page(task) + THREAD_SIZE); } EXPORT_SYMBOL_GPL(dump_trace); -- cgit v1.2.3