From 14b0dd870f6f3b28fad1235b70d1a692db1d6a2f Mon Sep 17 00:00:00 2001 From: Dmitry Safonov Date: Mon, 8 Jun 2020 21:30:53 -0700 Subject: microblaze: add loglvl to microblaze_unwind() Currently, the log-level of show_stack() depends on a platform realization. It creates situations where the headers are printed with lower log level or higher than the stacktrace (depending on a platform or user). Furthermore, it forces the logic decision from user to an architecture side. In result, some users as sysrq/kdb/etc are doing tricks with temporary rising console_loglevel while printing their messages. And in result it not only may print unwanted messages from other CPUs, but also omit printing at all in the unlucky case where the printk() was deferred. Introducing log-level parameter and KERN_UNSUPPRESSED [1] seems an easier approach than introducing more printk buffers. Also, it will consolidate printings with headers. Add log level parameter to microblaze_unwind() as a preparation to add show_stack_loglvl(). [1]: https://lore.kernel.org/lkml/20190528002412.1625-1-dima@arista.com/T/#u Signed-off-by: Dmitry Safonov Signed-off-by: Andrew Morton Cc: Michal Simek Link: http://lkml.kernel.org/r/20200418201944.482088-20-dima@arista.com Signed-off-by: Linus Torvalds --- arch/microblaze/kernel/unwind.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/microblaze/kernel/unwind.c') diff --git a/arch/microblaze/kernel/unwind.c b/arch/microblaze/kernel/unwind.c index 804bf0c99d8b..778a761af0a7 100644 --- a/arch/microblaze/kernel/unwind.c +++ b/arch/microblaze/kernel/unwind.c @@ -287,11 +287,11 @@ static void microblaze_unwind_inner(struct task_struct *task, * @task : Task whose stack we are to unwind (NULL == current) * @trace : Where to store stack backtrace (PC values). * NULL == print backtrace to kernel log + * @loglvl : Used for printk log level if (trace == NULL). */ -void microblaze_unwind(struct task_struct *task, struct stack_trace *trace) +void microblaze_unwind(struct task_struct *task, struct stack_trace *trace, + const char *loglvl) { - const char *loglvl = KERN_INFO; - if (task) { if (task == current) { const struct pt_regs *regs = task_pt_regs(task); -- cgit v1.2.3