Commit 992414a1 authored by Ingo Molnar's avatar Ingo Molnar

Merge branch 'locking/nmi' into locking/core, to pick up completed topic branch

Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents a68415c2 ed004953
......@@ -3,6 +3,9 @@
config TRACE_IRQFLAGS_SUPPORT
def_bool y
config TRACE_IRQFLAGS_NMI_SUPPORT
def_bool y
config EARLY_PRINTK_USB
bool
......
......@@ -3714,6 +3714,9 @@ void noinstr lockdep_hardirqs_on(unsigned long ip)
* and not rely on hardware state like normal interrupts.
*/
if (unlikely(in_nmi())) {
if (!IS_ENABLED(CONFIG_TRACE_IRQFLAGS_NMI))
return;
/*
* Skip:
* - recursion check, because NMI can hit lockdep;
......@@ -3773,7 +3776,10 @@ void noinstr lockdep_hardirqs_off(unsigned long ip)
* they will restore the software state. This ensures the software
* state is consistent inside NMIs as well.
*/
if (unlikely(!in_nmi() && (current->lockdep_recursion & LOCKDEP_RECURSION_MASK)))
if (in_nmi()) {
if (!IS_ENABLED(CONFIG_TRACE_IRQFLAGS_NMI))
return;
} else if (current->lockdep_recursion & LOCKDEP_RECURSION_MASK)
return;
/*
......
......@@ -1326,11 +1326,17 @@ config WW_MUTEX_SELFTEST
endmenu # lock debugging
config TRACE_IRQFLAGS
depends on TRACE_IRQFLAGS_SUPPORT
bool
help
Enables hooks to interrupt enabling and disabling for
either tracing or lock debugging.
config TRACE_IRQFLAGS_NMI
def_bool y
depends on TRACE_IRQFLAGS
depends on TRACE_IRQFLAGS_NMI_SUPPORT
config STACKTRACE
bool "Stack backtrace support"
depends on STACKTRACE_SUPPORT
......
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