Peter Zijlstra wrote:
On Mon, 2008-07-21 at 09:51 +0800, Zhao Yakui wrote:
On Sat, 2008-07-19 at 11:16 -0700, Daniel Walker wrote:
Instead of re-using semaphores for the mutex operation, I've
added usage of the kernel mutex for the os mutex implementation.
What is the advantage that the kernel mutex is used for the ACPI mutex
implementation instead of using semaphore?
And it seems that too much ACPICA source code is touched.
You get help from lockdep, and also our goal is to fully eradicate
semaphore usage.
Issue is that ACPICA is shared with other OS source code and to replace
a major interface like this would mean replacing it for everyone. It
might end up with ACPICA just reimplementing a semaphore like wrapper if
semaphores really go away, but I don't really see that coming anyways.
-Andi
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