On Apr 28, 2008, at 12:17 AM, Paul Mackerras wrote:
Kumar Gala writes:
* Added allocation and initialization of the irq stacks. We limit
the
stacks to be in lowmem for ppc32.
* Implemented ppc32 versions of call_do_softirq() and
call_handle_irq()
to switch the stack pointers
* Reworked how we do stack overflow detection. We now keep around
the
limit of the stack in the thread_struct and compare against the
limit
to see if we've overflowed. We can now use this on ppc64 if
desired.
Mostly looks great. One minor nit is that this ifdef could disappear
entirely now:
How do you figure? If we want to maintain it as a config option (for
at least 2.6.26) we either need this ifdef or a dummy irq_ctx_init().
@@ -352,7 +356,7 @@ void __init init_IRQ(void)
{
if (ppc_md.init_IRQ)
ppc_md.init_IRQ();
-#ifdef CONFIG_PPC64
+#ifdef CONFIG_IRQSTACKS
irq_ctx_init();
#endif
Since it looks pretty much exactly like what 64-bit already does, and
it's under a config option, I withdraw my objection to it going into
2.6.26.
:)
- k
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