From: Stephen Rothwell <sfr@canb.auug.org.au>

This patch lets 2.6.3-rc4 build and boot on an PPC64 iSeries box (at least
for my configuration).  The veth.o bit in the networking Makefile got there
by accident and should be removed anyway ...

There is more to make it work properly (note the "Temporary hack"), but
this gets us closer.



---

 arch/ppc64/kernel/iSeries_irq.c   |   22 ++++++----------------
 arch/ppc64/kernel/iSeries_pci.c   |    1 -
 arch/ppc64/kernel/iSeries_setup.c |    1 -
 drivers/net/Makefile              |    1 -
 4 files changed, 6 insertions(+), 19 deletions(-)

diff -puN arch/ppc64/kernel/iSeries_irq.c~ppc64-iseries-irq-fix arch/ppc64/kernel/iSeries_irq.c
--- 25/arch/ppc64/kernel/iSeries_irq.c~ppc64-iseries-irq-fix	2004-02-17 20:34:36.000000000 -0800
+++ 25-akpm/arch/ppc64/kernel/iSeries_irq.c	2004-02-17 20:34:36.000000000 -0800
@@ -57,6 +57,7 @@ static hw_irq_controller iSeries_IRQ_han
 
 void iSeries_init_irq_desc(irq_desc_t *desc)
 {
+	desc->handler = &iSeries_IRQ_handler;
 }
 
 /* This is called by init_IRQ.  set in ppc_md.init_IRQ by iSeries_setup.c */
@@ -87,22 +88,6 @@ int __init iSeries_allocate_IRQ(HvBusNum
 #define IRQ_TO_IDSEL(irq)	(((((irq) - 1) >> 3) & 7) + 1)
 #define IRQ_TO_FUNC(irq)	(((irq) - 1) & 7)
 
-/*
- * This is called out of iSeries_scan_slot to assign the EADS slot
- * to its IRQ number
- */
-int __init iSeries_assign_IRQ(int irq, HvBusNumber busNumber,
-		HvSubBusNumber subBusNumber, HvAgentId deviceId)
-{
-	irq_desc_t *desc = get_real_irq_desc(irq);
-
-	if (desc == NULL)
-		return -1;
-	desc->handler = &iSeries_IRQ_handler;
-	return 0;
-}
-
-
 /* This is called by iSeries_activate_IRQs */
 static unsigned int iSeries_startup_IRQ(unsigned int irq)
 {
@@ -125,6 +110,11 @@ static unsigned int iSeries_startup_IRQ(
 }
 
 /*
+ * Temporary hack
+ */
+#define get_irq_desc(irq)	&irq_desc[(irq)]
+
+/*
  * This is called out of iSeries_fixup to activate interrupt
  * generation for usable slots
  */
diff -puN arch/ppc64/kernel/iSeries_pci.c~ppc64-iseries-irq-fix arch/ppc64/kernel/iSeries_pci.c
--- 25/arch/ppc64/kernel/iSeries_pci.c~ppc64-iseries-irq-fix	2004-02-17 20:34:36.000000000 -0800
+++ 25-akpm/arch/ppc64/kernel/iSeries_pci.c	2004-02-17 20:34:36.000000000 -0800
@@ -406,7 +406,6 @@ static int iSeries_Scan_Bridge_Slot(HvBu
 
 	/* iSeries_allocate_IRQ.: 0x18.00.12(0xA3) */
   	Irq = iSeries_allocate_IRQ(Bus, 0, EADsIdSel);
-	iSeries_assign_IRQ(Irq, Bus, 0, EADsIdSel);
 	PPCDBG(PPCDBG_BUSWALK,
 		"PCI:- allocate and assign IRQ 0x%02X.%02X.%02X = 0x%02X\n",
 		Bus, 0, EADsIdSel, Irq);
diff -puN arch/ppc64/kernel/iSeries_setup.c~ppc64-iseries-irq-fix arch/ppc64/kernel/iSeries_setup.c
--- 25/arch/ppc64/kernel/iSeries_setup.c~ppc64-iseries-irq-fix	2004-02-17 20:34:36.000000000 -0800
+++ 25-akpm/arch/ppc64/kernel/iSeries_setup.c	2004-02-17 20:34:36.000000000 -0800
@@ -315,7 +315,6 @@ void __init iSeries_init_early(void)
 	ppc_md.setup_residual = iSeries_setup_residual;
 	ppc_md.get_cpuinfo = iSeries_get_cpuinfo;
 	ppc_md.init_IRQ = iSeries_init_IRQ;
-	ppc_md.init_irq_desc = iSeries_init_irq_desc;
 	ppc_md.get_irq = iSeries_get_irq;
 	ppc_md.init = NULL;
 
diff -puN drivers/net/Makefile~ppc64-iseries-irq-fix drivers/net/Makefile
--- 25/drivers/net/Makefile~ppc64-iseries-irq-fix	2004-02-17 20:34:36.000000000 -0800
+++ 25-akpm/drivers/net/Makefile	2004-02-17 20:34:36.000000000 -0800
@@ -45,7 +45,6 @@ obj-$(CONFIG_SIS190) += sis190.o
 obj-$(CONFIG_SIS900) += sis900.o
 obj-$(CONFIG_YELLOWFIN) += yellowfin.o
 obj-$(CONFIG_ACENIC) += acenic.o
-obj-$(CONFIG_VETH) += veth.o
 obj-$(CONFIG_NATSEMI) += natsemi.o
 obj-$(CONFIG_NS83820) += ns83820.o
 obj-$(CONFIG_STNIC) += stnic.o 8390.o

_