]> git.baikalelectronics.ru Git - kernel.git/commit
xtensa: add show_stack_loglvl()
authorDmitry Safonov <dima@arista.com>
Tue, 9 Jun 2020 04:32:07 +0000 (21:32 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 9 Jun 2020 16:39:12 +0000 (09:39 -0700)
commit9b2abc0d22339bd36b5f8c0d01ff5594e94c3349
tree07e73fa586e3af27e478b1e5441e265a00aa8590
parent4c38b86a9320eeb6f14f456bda8ac083938623e7
xtensa: add show_stack_loglvl()

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.

Introduce show_stack_loglvl(), that eventually will substitute
show_stack().

[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-dima@arista.com/T/#u

Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Link: http://lkml.kernel.org/r/20200418201944.482088-44-dima@arista.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/xtensa/kernel/traps.c