X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Farm%2Fmm%2Finit.c;h=76f82ae44efb177ae925cc998b9c3ce2c8470bb3;hb=a77febbef105554c5a37241cf903f48ab7bc03c7;hp=e5f6fc42834892e7622664b496d3aa0288eaa2ff;hpb=adff377bb1010ec65aada1f94ef2be7c7805c711;p=pandora-kernel.git

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index e5f6fc428348..76f82ae44efb 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -201,6 +201,20 @@ static void __init arm_bootmem_init(unsigned long start_pfn,
 	}
 }
 
+#ifdef CONFIG_ZONE_DMA
+static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole,
+	unsigned long dma_size)
+{
+	if (size[0] <= dma_size)
+		return;
+
+	size[ZONE_NORMAL] = size[0] - dma_size;
+	size[ZONE_DMA] = dma_size;
+	hole[ZONE_NORMAL] = hole[0];
+	hole[ZONE_DMA] = 0;
+}
+#endif
+
 static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
 	unsigned long max_high)
 {
@@ -243,11 +257,18 @@ static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
 #endif
 	}
 
+#ifdef ARM_DMA_ZONE_SIZE
+#ifndef CONFIG_ZONE_DMA
+#error ARM_DMA_ZONE_SIZE set but no DMA zone to limit allocations
+#endif
+
 	/*
 	 * Adjust the sizes according to any special requirements for
 	 * this machine type.
 	 */
-	arch_adjust_zones(zone_size, zhole_size);
+	arm_adjust_dma_zone(zone_size, zhole_size,
+		ARM_DMA_ZONE_SIZE >> PAGE_SHIFT);
+#endif
 
 	free_area_init_node(0, zone_size, min, zhole_size);
 }
@@ -392,7 +413,7 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 	 * Convert start_pfn/end_pfn to a struct page pointer.
 	 */
 	start_pg = pfn_to_page(start_pfn - 1) + 1;
-	end_pg = pfn_to_page(end_pfn);
+	end_pg = pfn_to_page(end_pfn - 1) + 1;
 
 	/*
 	 * Convert to physical addresses, and
@@ -426,6 +447,14 @@ static void __init free_unused_memmap(struct meminfo *mi)
 
 		bank_start = bank_pfn_start(bank);
 
+#ifdef CONFIG_SPARSEMEM
+		/*
+		 * Take care not to free memmap entries that don't exist
+		 * due to SPARSEMEM sections which aren't present.
+		 */
+		bank_start = min(bank_start,
+				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
+#endif
 		/*
 		 * If we had a previous bank, and there is a space
 		 * between the current bank and the previous, free it.
@@ -440,6 +469,12 @@ static void __init free_unused_memmap(struct meminfo *mi)
 		 */
 		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
 	}
+
+#ifdef CONFIG_SPARSEMEM
+	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
+		free_memmap(prev_bank_end,
+			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
+#endif
 }
 
 static void __init free_highpages(void)