[PATCH] lockdep: irqtrace subsystem, move account_system_vtime() calls into kernel/softirq.c
At the moment, powerpc and s390 have their own versions of do_softirq which
include local_bh_disable() and __local_bh_enable() calls. They end up
calling __do_softirq (in kernel/softirq.c) which also does
local_bh_disable/enable.
Apparently the two levels of disable/enable trigger a warning from some
validation code that Ingo is working on, and he would like to see the outer
level removed. But to do that, we have to move the account_system_vtime
calls that are currently in the arch do_softirq() implementations for
powerpc and s390 into the generic __do_softirq() (this is a no-op for other
archs because account_system_vtime is defined to be an empty inline
function on all other archs). This patch does that.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 584609b..215541e 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -193,6 +193,8 @@
int cpu;
pending = local_softirq_pending();
+ account_system_vtime(current);
+
__local_bh_disable((unsigned long)__builtin_return_address(0));
trace_softirq_enter();
@@ -224,6 +226,8 @@
wakeup_softirqd();
trace_softirq_exit();
+
+ account_system_vtime(current);
_local_bh_enable();
}