Re: 2.6.15-rc5-mm2 can't boot on ia64 due to changing on_each_cpu().

[Kenji Kaneshige]

Benjamin LaHaise wrote:
> On Wed, Dec 14, 2005 at 06:56:58PM -0800, Andrew Morton wrote:
>
> > Thanks.  I'll drop it.
>
>
> Please don't.  Fix ia64's brain damage instead.  Function pointers 
> should not be cast, period.
>
> 		-ben

How about this?

Thanks,
Kenji Kaneshige


We need this patch on ia64 to convert on_each_cpu to a macro.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx>

arch/ia64/kernel/smp.c         |    4 ++--
arch/ia64/kernel/smpboot.c     |    2 +-
arch/ia64/mm/tlb.c             |    6 +++---
include/asm-ia64/mmu_context.h |    4 ++--
include/asm-ia64/tlbflush.h    |    5 +++--
5 files changed, 11 insertions(+), 10 deletions(-)

Index: linux-2.6.15-rc5-mm2/arch/ia64/kernel/smpboot.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/ia64/kernel/smpboot.c
+++ linux-2.6.15-rc5-mm2/arch/ia64/kernel/smpboot.c
@@ -652,7 +652,7 @@ int __cpu_disable(void)
	remove_siblinginfo(cpu);
	cpu_clear(cpu, cpu_online_map);
	fixup_irqs();
-	local_flush_tlb_all();
+	local_flush_tlb_all(NULL);
	cpu_clear(cpu, cpu_callin_map);
	return 0;
}
Index: linux-2.6.15-rc5-mm2/arch/ia64/mm/tlb.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/ia64/mm/tlb.c
+++ linux-2.6.15-rc5-mm2/arch/ia64/mm/tlb.c
@@ -81,7 +81,7 @@ wrap_mmu_context (struct mm_struct *mm)
		if (i != cpu)
			per_cpu(ia64_need_tlb_flush, i) = 1;
	put_cpu();
-	local_flush_tlb_all();
+	local_flush_tlb_all(NULL);
}

void
@@ -111,7 +111,7 @@ ia64_global_tlb_purge (struct mm_struct 
}

void
-local_flush_tlb_all (void)
+local_flush_tlb_all (void *dummy)
{
	unsigned long i, j, flags, count0, count1, stride0, stride1, addr;

@@ -192,5 +192,5 @@ ia64_tlb_init (void)
	local_cpu_data->ptce_stride[0] = ptce_info.stride[0];
	local_cpu_data->ptce_stride[1] = ptce_info.stride[1];

-	local_flush_tlb_all();	/* nuke left overs from bootstrapping... */
+	local_flush_tlb_all(NULL);/* nuke left overs from bootstrapping... */
}
Index: linux-2.6.15-rc5-mm2/arch/ia64/kernel/smp.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/ia64/kernel/smp.c
+++ linux-2.6.15-rc5-mm2/arch/ia64/kernel/smp.c
@@ -225,7 +225,7 @@ smp_send_reschedule (int cpu)
void
smp_flush_tlb_all (void)
{
-	on_each_cpu((void (*)(void *))local_flush_tlb_all, NULL, 1, 1);
+	on_each_cpu(local_flush_tlb_all, NULL, 1, 1);
}

void
@@ -248,7 +248,7 @@ smp_flush_tlb_mm (struct mm_struct *mm)
	 * anyhow, and once a CPU is interrupted, the cost of local_flush_tlb_all() is
	 * rather trivial.
	 */
-	on_each_cpu((void (*)(void *))local_finish_flush_tlb_mm, mm, 1, 1);
+	on_each_cpu(local_finish_flush_tlb_mm, mm, 1, 1);
}

/*
Index: linux-2.6.15-rc5-mm2/include/asm-ia64/tlbflush.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/asm-ia64/tlbflush.h
+++ linux-2.6.15-rc5-mm2/include/asm-ia64/tlbflush.h
@@ -23,7 +23,7 @@
 * Flush everything (kernel mapping may also have changed due to
 * vmalloc/vfree).
 */
-extern void local_flush_tlb_all (void);
+extern void local_flush_tlb_all (void *dummy);

#ifdef CONFIG_SMP
  extern void smp_flush_tlb_all (void);
@@ -34,8 +34,9 @@ extern void local_flush_tlb_all (void);
#endif

static inline void
-local_finish_flush_tlb_mm (struct mm_struct *mm)
+local_finish_flush_tlb_mm (void *info)
{
+	struct mm_struct *mm = (struct mm_struct *)info;
	if (mm == current->active_mm)
		activate_context(mm);
}
Index: linux-2.6.15-rc5-mm2/include/asm-ia64/mmu_context.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/asm-ia64/mmu_context.h
+++ linux-2.6.15-rc5-mm2/include/asm-ia64/mmu_context.h
@@ -60,13 +60,13 @@ enter_lazy_tlb (struct mm_struct *mm, st
static inline void
delayed_tlb_flush (void)
{
-	extern void local_flush_tlb_all (void);
+	extern void local_flush_tlb_all (void *);
	unsigned long flags;

	if (unlikely(__ia64_per_cpu_var(ia64_need_tlb_flush))) {
		spin_lock_irqsave(&ia64_ctx.lock, flags);
		if (__ia64_per_cpu_var(ia64_need_tlb_flush)) {
-			local_flush_tlb_all();
+			local_flush_tlb_all(NULL);
			__ia64_per_cpu_var(ia64_need_tlb_flush) = 0;
		}
		spin_unlock_irqrestore(&ia64_ctx.lock, flags);


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