---

yaml
---
r: 108638
b: refs/heads/master
c: 60296c7
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 09c0ed2e6eb87613b2670c15ba771ac671db19d9
+refs/heads/master: 60296c71f6c5063e3c1f1d2619ca0b60940162e7

trunk/arch/arm/include/asm/memory.h

@@ -149,6 +149,14 @@
 #define arch_adjust_zones(node,size,holes) do { } while (0)
 #endif
 
+/*
+ * Amount of memory reserved for the vmalloc() area, and minimum
+ * address for vmalloc mappings.
+ */
+extern unsigned long vmalloc_reserve;
+
+#define VMALLOC_MIN		(void *)(VMALLOC_END - vmalloc_reserve)
+
 /*
  * PFNs are used to describe any physical page; this means
  * PFN 0 == physical address 0.

trunk/arch/arm/kernel/setup.c

@@ -81,6 +81,8 @@ EXPORT_SYMBOL(system_serial_high);
 unsigned int elf_hwcap;
 EXPORT_SYMBOL(elf_hwcap);
 
+unsigned long __initdata vmalloc_reserve = 128 << 20;
+
 
 #ifdef MULTI_CPU
 struct processor processor;
@@ -500,6 +502,17 @@ static void __init early_mem(char **p)
 }
 __early_param("mem=", early_mem);
 
+/*
+ * vmalloc=size forces the vmalloc area to be exactly 'size'
+ * bytes. This can be used to increase (or decrease) the vmalloc
+ * area - the default is 128m.
+ */
+static void __init early_vmalloc(char **arg)
+{
+	vmalloc_reserve = memparse(*arg, arg);
+}
+__early_param("vmalloc=", early_vmalloc);
+
 /*
  * Initial parsing of the command line.
  */

trunk/arch/arm/mm/mmu.c

@@ -568,6 +568,55 @@ void __init iotable_init(struct map_desc *io_desc, int nr)
 		create_mapping(io_desc + i);
 }
 
+static int __init check_membank_valid(struct membank *mb)
+{
+	/*
+	 * Check whether this memory region has non-zero size.
+	 */
+	if (mb->size == 0)
+		return 0;
+
+	/*
+	 * Check whether this memory region would entirely overlap
+	 * the vmalloc area.
+	 */
+	if (phys_to_virt(mb->start) >= VMALLOC_MIN) {
+		printk(KERN_NOTICE "Ignoring RAM at %.8lx-%.8lx "
+			"(vmalloc region overlap).\n",
+			mb->start, mb->start + mb->size - 1);
+		return 0;
+	}
+
+	/*
+	 * Check whether this memory region would partially overlap
+	 * the vmalloc area.
+	 */
+	if (phys_to_virt(mb->start + mb->size) < phys_to_virt(mb->start) ||
+	    phys_to_virt(mb->start + mb->size) > VMALLOC_MIN) {
+		unsigned long newsize = VMALLOC_MIN - phys_to_virt(mb->start);
+
+		printk(KERN_NOTICE "Truncating RAM at %.8lx-%.8lx "
+			"to -%.8lx (vmalloc region overlap).\n",
+			mb->start, mb->start + mb->size - 1,
+			mb->start + newsize - 1);
+		mb->size = newsize;
+	}
+
+	return 1;
+}
+
+static void __init sanity_check_meminfo(struct meminfo *mi)
+{
+	int i;
+	int j;
+
+	for (i = 0, j = 0; i < mi->nr_banks; i++) {
+		if (check_membank_valid(&mi->bank[i]))
+			mi->bank[j++] = mi->bank[i];
+	}
+	mi->nr_banks = j;
+}
+
 static inline void prepare_page_table(struct meminfo *mi)
 {
 	unsigned long addr;
@@ -753,6 +802,7 @@ void __init paging_init(struct meminfo *mi, struct machine_desc *mdesc)
 	void *zero_page;
 
 	build_mem_type_table();
+	sanity_check_meminfo(mi);
 	prepare_page_table(mi);
 	bootmem_init(mi);
 	devicemaps_init(mdesc);