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[PATCH] lockdep: irqtrace subsystem, move account_system_vtime() calls into kernel/softirq.c

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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 <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Paul Mackerras 2006-07-03 00:25:40 -07:00 • committed by Linus Torvalds
commit 829035fd70
3 changed files with 5 additions and 14 deletions
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4
kernel/softirq.c
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@ -193,6 +193,8 @@ asmlinkage void __do_softirq(void)
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 @@ restart:
wakeup_softirqd();
trace_softirq_exit();
account_system_vtime(current);
_local_bh_enable();
}