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x86, of: Define irq functions to allow drivers/of/* to build on x86

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- Define a stub irq_create_of_mapping for x86 as a stop-gap solution until
   drivers/of/irq is further along.
 - Define irq_dispose_mapping for x86 to appease of_i2c.c

These are needed to allow stuff in drivers/of/ to build on x86.  This stuff
will eventually get replaced; quoting Grant,

"The long term plan is to have the drivers/of/ code handling the mapping
intelligently like powerpc currently does."  But for now, just provide
these functions.

Signed-off-by: Andres Salomon <dilinger@queued.net>
LKML-Reference: <20101111214526.5de7121b@queued.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Andres Salomon 2010-11-12 05:45:26 +00:00 committed by H. Peter Anvin
parent cf7d7e5a19
commit 4722d194e6
2 changed files with 13 additions and 0 deletions
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3
arch/x86/include/asm/irq.h
View File

@ -10,6 +10,9 @@
#include <asm/apicdef.h>
#include <asm/irq_vectors.h>
/* Even though we don't support this, supply it to appease OF */
static inline void irq_dispose_mapping(unsigned int virq) { }
static inline int irq_canonicalize(int irq)
{
return ((irq == 2) ? 9 : irq);

10
arch/x86/kernel/irq.c
View File

@ -4,6 +4,7 @@
#include <linux/cpu.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/of.h>
#include <linux/seq_file.h>
#include <linux/smp.h>
#include <linux/ftrace.h>
@ -275,6 +276,15 @@ void smp_x86_platform_ipi(struct pt_regs *regs)
EXPORT_SYMBOL_GPL(vector_used_by_percpu_irq);
#ifdef CONFIG_OF
unsigned int irq_create_of_mapping(struct device_node *controller,
const u32 *intspec, unsigned int intsize)
{
return intspec[0];
}
EXPORT_SYMBOL_GPL(irq_create_of_mapping);
#endif
#ifdef CONFIG_HOTPLUG_CPU
/* A cpu has been removed from cpu_online_mask. Reset irq affinities. */
void fixup_irqs(void)