Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm: (38 commits)
  [ARM] 5191/1: ARM: remove CVS keywords
  [ARM] pxafb: fix the warning of incorrect lccr when lcd_conn is specified
  [ARM] pxafb: add flag to specify output format on LDD pins when base is RGBT16
  [ARM] pxafb: fix the incorrect configuration of GPIO77 as ACBIAS for TFT LCD
  [ARM] 5198/1: PalmTX: PCMCIA fixes
  [ARM] Fix a pile of broken watchdog drivers
  [ARM] update mach-types
  [ARM] 5196/1: fix inline asm constraints for preload
  [ARM] 5194/1: update .gitignore
  [ARM] add proc-macros.S include to proc-arm940 and proc-arm946
  [ARM] 5192/1: ARM TLB: add v7wbi_{possible,always}_flags to {possible,always}_tlb_flags
  [ARM] 5193/1: Wire up missing syscalls
  [ARM] traps: don't call undef hook functions with spinlock held
  [ARM] 5183/2: Provide Poodle LoCoMo GPIO names
  [ARM] dma-mapping: provide sync_range APIs
  [ARM] dma-mapping: improve type-safeness of DMA translations
  [ARM] Kirkwood: instantiate the orion_spi driver in the platform code
  [ARM] prevent crashing when too much RAM installed
  [ARM] Kirkwood: Instantiate mv_xor driver
  [ARM] Orion: Instantiate mv_xor driver for 5182
  ...

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 2d6d682c206a..25d9a11eb617 100644
--- a/arch/arm/mm/mmu.c
+++ b/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);