Re: 2.6.18-rc6-mm2: fix for error compiling ppc/mm/init.c

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On Wed, 4 Oct 2006, Benjamin Herrenschmidt wrote:



Patch looks good on a quick look. I will try to test later today at
which point, it should go in asap, current upstream doesn't boot on
CONFIG_HIGHMEM powerpc, which is a lot of them...
The patch has passed tests here on x86, x86_64, ia64 and ppc64. Testing on powerpc with HIGHMEM is a configuration I cannot test. If you say it passes, I'll see can I get it pushed before 2.6.19-rc1 

Thanks



diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/i386/kernel/setup.c linux-2.6.18-git19-use_zone_symbolic_names/arch/i386/kernel/setup.c
--- linux-2.6.18-git19-clean/arch/i386/kernel/setup.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/i386/kernel/setup.c	2006-10-03 11:15:59.000000000 +0100
@@ -1083,16 +1083,15 @@ static unsigned long __init setup_memory

 void __init zone_sizes_init(void)
 {
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] =
+		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 #ifdef CONFIG_HIGHMEM
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-			virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT,
-			max_low_pfn,
-			highend_pfn};
+	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
 	add_active_range(0, 0, highend_pfn);
 #else
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-			virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT,
-			max_low_pfn};
 	add_active_range(0, 0, max_low_pfn);
 #endif

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/i386/mm/discontig.c linux-2.6.18-git19-use_zone_symbolic_names/arch/i386/mm/discontig.c
--- linux-2.6.18-git19-clean/arch/i386/mm/discontig.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/i386/mm/discontig.c	2006-10-03 11:17:27.000000000 +0100
@@ -357,11 +357,12 @@ void __init numa_kva_reserve(void)
 void __init zone_sizes_init(void)
 {
 	int nid;
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT,
-		max_low_pfn,
-		highend_pfn
-	};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] =
+		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;

 	/* If SRAT has not registered memory, register it now */
 	if (find_max_pfn_with_active_regions() == 0) {
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/ia64/mm/contig.c linux-2.6.18-git19-use_zone_symbolic_names/arch/ia64/mm/contig.c
--- linux-2.6.18-git19-clean/arch/ia64/mm/contig.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/ia64/mm/contig.c	2006-10-03 11:21:09.000000000 +0100
@@ -233,6 +233,7 @@ paging_init (void)
 	efi_memmap_walk(count_pages, &num_physpages);

 	max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 	max_zone_pfns[ZONE_DMA] = max_dma;
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/ia64/mm/discontig.c linux-2.6.18-git19-use_zone_symbolic_names/arch/ia64/mm/discontig.c
--- linux-2.6.18-git19-clean/arch/ia64/mm/discontig.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/ia64/mm/discontig.c	2006-10-03 11:21:54.000000000 +0100
@@ -709,6 +709,7 @@ void __init paging_init(void)
 			max_pfn = mem_data[node].max_pfn;
 	}

+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 	max_zone_pfns[ZONE_DMA] = max_dma;
 	max_zone_pfns[ZONE_NORMAL] = max_pfn;
 	free_area_init_nodes(max_zone_pfns);
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/powerpc/mm/mem.c linux-2.6.18-git19-use_zone_symbolic_names/arch/powerpc/mm/mem.c
--- linux-2.6.18-git19-clean/arch/powerpc/mm/mem.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/powerpc/mm/mem.c	2006-10-03 11:10:57.000000000 +0100
@@ -307,11 +307,12 @@ void __init paging_init(void)
 	       top_of_ram, total_ram);
 	printk(KERN_DEBUG "Memory hole size: %ldMB\n",
 	       (top_of_ram - total_ram) >> 20);
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 #ifdef CONFIG_HIGHMEM
-	max_zone_pfns[0] = total_lowmem >> PAGE_SHIFT;
-	max_zone_pfns[1] = top_of_ram >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = total_lowmem >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_HIGHMEM] = top_of_ram >> PAGE_SHIFT;
 #else
-	max_zone_pfns[0] = top_of_ram >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = top_of_ram >> PAGE_SHIFT;
 #endif
 	free_area_init_nodes(max_zone_pfns);
 }
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/powerpc/mm/numa.c linux-2.6.18-git19-use_zone_symbolic_names/arch/powerpc/mm/numa.c
--- linux-2.6.18-git19-clean/arch/powerpc/mm/numa.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/powerpc/mm/numa.c	2006-10-03 11:12:01.000000000 +0100
@@ -617,9 +617,9 @@ void __init do_init_bootmem(void)

 void __init paging_init(void)
 {
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-				lmb_end_of_DRAM() >> PAGE_SHIFT
-	};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] = lmb_end_of_DRAM() >> PAGE_SHIFT;
 	free_area_init_nodes(max_zone_pfns);
 }

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/ppc/mm/init.c linux-2.6.18-git19-use_zone_symbolic_names/arch/ppc/mm/init.c
--- linux-2.6.18-git19-clean/arch/ppc/mm/init.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/ppc/mm/init.c	2006-10-03 11:13:46.000000000 +0100
@@ -374,11 +374,12 @@ void __init paging_init(void)
 	end_pfn = start_pfn + (total_memory >> PAGE_SHIFT);
 	add_active_range(0, start_pfn, end_pfn);

+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 #ifdef CONFIG_HIGHMEM
-	max_zone_pfns[0] = total_lowmem >> PAGE_SHIFT;
-	max_zone_pfns[1] = total_memory >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = total_lowmem >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_HIGHMEM] = total_memory >> PAGE_SHIFT;
 #else
-	max_zone_pfns[0] = total_memory >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = total_memory >> PAGE_SHIFT;
 #endif /* CONFIG_HIGHMEM */
 	free_area_init_nodes(max_zone_pfns);
 }
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/x86_64/mm/init.c linux-2.6.18-git19-use_zone_symbolic_names/arch/x86_64/mm/init.c
--- linux-2.6.18-git19-clean/arch/x86_64/mm/init.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/x86_64/mm/init.c	2006-10-03 11:18:54.000000000 +0100
@@ -406,9 +406,12 @@ void __cpuinit zap_low_mappings(int cpu)
 #ifndef CONFIG_NUMA
 void __init paging_init(void)
 {
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {MAX_DMA_PFN,
-							MAX_DMA32_PFN,
-							end_pfn};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
+	max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
+	max_zone_pfns[ZONE_NORMAL] = end_pfn;
+
 	memory_present(0, 0, end_pfn);
 	sparse_init();
 	free_area_init_nodes(max_zone_pfns);
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.18-git19-clean/arch/x86_64/mm/numa.c linux-2.6.18-git19-use_zone_symbolic_names/arch/x86_64/mm/numa.c
--- linux-2.6.18-git19-clean/arch/x86_64/mm/numa.c	2006-10-03 09:12:56.000000000 +0100
+++ linux-2.6.18-git19-use_zone_symbolic_names/arch/x86_64/mm/numa.c	2006-10-03 11:19:47.000000000 +0100
@@ -338,9 +338,11 @@ static void __init arch_sparse_init(void
 void __init paging_init(void)
 {
 	int i;
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = { MAX_DMA_PFN,
-		MAX_DMA32_PFN,
-		end_pfn};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
+	max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
+	max_zone_pfns[ZONE_NORMAL] = end_pfn;

 	arch_sparse_init();



--
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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