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authorDmitry Safonov <dima@arista.com>2020-06-08 21:30:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-09 09:39:11 -0700
commitc76898373f9b71586edaf150190c493ae9ed3e77 (patch)
tree2d501dcc4fbcb66c6c3264849965c40e4e14a1be /arch/arm64/kernel/process.c
parenta4502d04c7dd075846bb70ebfde3843f9df86f98 (diff)
downloadlinux-stericsson-c76898373f9b71586edaf150190c493ae9ed3e77.tar.gz
arm64: add loglvl to dump_backtrace()
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 argument to dump_backtrace() as a preparation for introducing show_stack_loglvl(). [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: Catalin Marinas <catalin.marinas@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200418201944.482088-10-dima@arista.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm64/kernel/process.c')
-rw-r--r--arch/arm64/kernel/process.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index eade7807e819..6089638c7d43 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -306,7 +306,7 @@ void __show_regs(struct pt_regs *regs)
void show_regs(struct pt_regs * regs)
{
__show_regs(regs);
- dump_backtrace(regs, NULL);
+ dump_backtrace(regs, NULL, KERN_DEFAULT);
}
static void tls_thread_flush(void)