Re: [PATCH v3 -tip 1/5] x86, MSI: Support multiple MSIs in presenseof IRQ remapping

From: Alexander Gordeev
Date: Thu Oct 04 2012 - 03:55:02 EST


On Tue, Oct 02, 2012 at 01:25:24PM +0200, Ingo Molnar wrote:
> > > > @@ -584,8 +586,12 @@ int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
> > > > #define irq_alloc_desc_from(from, node) \
> > > > irq_alloc_descs(-1, from, 1, node)
> > > >
> > > > +#define irq_alloc_descs_from(from, cnt, node) \
> > > > + irq_alloc_descs(-1, from, cnt, node)
> > > > +
> > >
> > > Please use inlines instead of macros. Might transform the one
> > > above it as well in the process.
> >
> > You mean here do not introduce irq_alloc_descs_from, but rather use
> > irq_alloc_descs() directly?
>
> My suggestion is to add irq_alloc_descs_from() as a (very
> simple) inline function and change irq_alloc_desc_from() to be
> an inline function as well.

These defines were added on purpose with commit ec53cf2 ("irq: don't put
module.h into irq.h for tracking irqgen modules.") - the relevant hunk is
below. I suppose we do not want to revert it?


@@ -567,29 +567,21 @@ static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
struct module *owner);

-static inline int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt,
- int node)
-{
- return __irq_alloc_descs(irq, from, cnt, node, THIS_MODULE);
-}
+/* use macros to avoid needing export.h for THIS_MODULE */
+#define irq_alloc_descs(irq, from, cnt, node) \
+ __irq_alloc_descs(irq, from, cnt, node, THIS_MODULE)

-void irq_free_descs(unsigned int irq, unsigned int cnt);
-int irq_reserve_irqs(unsigned int from, unsigned int cnt);
+#define irq_alloc_desc(node) \
+ irq_alloc_descs(-1, 0, 1, node)

-static inline int irq_alloc_desc(int node)
-{
- return irq_alloc_descs(-1, 0, 1, node);
-}
+#define irq_alloc_desc_at(at, node) \
+ irq_alloc_descs(at, at, 1, node)

-static inline int irq_alloc_desc_at(unsigned int at, int node)
-{
- return irq_alloc_descs(at, at, 1, node);
-}
+#define irq_alloc_desc_from(from, node) \
+ irq_alloc_descs(-1, from, 1, node)

-static inline int irq_alloc_desc_from(unsigned int from, int node)
-{
- return irq_alloc_descs(-1, from, 1, node);
-}
+void irq_free_descs(unsigned int irq, unsigned int cnt);
+int irq_reserve_irqs(unsigned int from, unsigned int cnt);

static inline void irq_free_desc(unsigned int irq)
{



--
Regards,
Alexander Gordeev
agordeev@xxxxxxxxxx
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