tree f0fb4a422667f67e7e3ac587bbbc6b03fa83756a
parent f3384b28a05624783b53836ccfed95ecde66a7ad
author Steven Rostedt <rostedt@goodmis.org> 1224855779 -0400
committer Ingo Molnar <mingo@elte.hu> 1225407806 +0100

ftrace: handle archs that do not support irqs_disabled_flags

Impact: build fix on non-lockdep architectures

Some architectures do not support a way to read the irq flags that
is set from "local_irq_save(flags)" to determine if interrupts were
disabled or enabled. Ftrace uses this information to display to the user
if the trace occurred with interrupts enabled or disabled.

Besides the fact that those archs that do not support this will fail to
compile, unless they fix it, we do not want to have the trace simply
say interrupts were not disabled or they were enabled, without knowing
the real answer.

This patch adds a 'X' in the output to let the user know that the
architecture they are running on does not support a way for the tracer
to determine if interrupts were enabled or disabled. It also lets those
same archs compile with tracing enabled.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>