Merge branch 'samsung/board' into next/boards

[~andy/linux] / arch / arm / mm / init.c

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index cc7e2d8be9aa6f55cd1f670c998e1c065acec75e..786adddf1a86c70cd1087a7341c79b49bf03ca6b 100644 (file)
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -13,13 +13,13 @@
 #include <linux/init.h>
 #include <linux/bootmem.h>
 #include <linux/mman.h>
+#include <linux/export.h>
 #include <linux/nodemask.h>
 #include <linux/initrd.h>
 #include <linux/of_fdt.h>
 #include <linux/highmem.h>
 #include <linux/gfp.h>
 #include <linux/memblock.h>
-#include <linux/sort.h>
 
 #include <asm/mach-types.h>
 #include <asm/prom.h>
@@ -133,30 +133,18 @@ void show_mem(unsigned int filter)
 }
 
 static void __init find_limits(unsigned long *min, unsigned long *max_low,
-       unsigned long *max_high)
+                              unsigned long *max_high)
 {
        struct meminfo *mi = &meminfo;
        int i;
 
-       *min = -1UL;
-       *max_low = *max_high = 0;
-
-       for_each_bank (i, mi) {
-               struct membank *bank = &mi->bank[i];
-               unsigned long start, end;
-
-               start = bank_pfn_start(bank);
-               end = bank_pfn_end(bank);
-
-               if (*min > start)
-                       *min = start;
-               if (*max_high < end)
-                       *max_high = end;
-               if (bank->highmem)
-                       continue;
-               if (*max_low < end)
-                       *max_low = end;
-       }
+       /* This assumes the meminfo array is properly sorted */
+       *min = bank_pfn_start(&mi->bank[0]);
+       for_each_bank (i, mi)
+               if (mi->bank[i].highmem)
+                               break;
+       *max_low = bank_pfn_end(&mi->bank[i - 1]);
+       *max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
 }
 
 static void __init arm_bootmem_init(unsigned long start_pfn,
@@ -318,19 +306,10 @@ static void arm_memory_present(void)
 }
 #endif
 
-static int __init meminfo_cmp(const void *_a, const void *_b)
-{
-       const struct membank *a = _a, *b = _b;
-       long cmp = bank_pfn_start(a) - bank_pfn_start(b);
-       return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
-}
-
 void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc)
 {
        int i;
 
-       sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
-
        memblock_init();
        for (i = 0; i < mi->nr_banks; i++)
                memblock_add(mi->bank[i].start, mi->bank[i].size);
@@ -402,8 +381,6 @@ void __init bootmem_init(void)
         */
        arm_bootmem_free(min, max_low, max_high);
 
-       high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1;
-
        /*
         * This doesn't seem to be used by the Linux memory manager any
         * more, but is used by ll_rw_block.  If we can get rid of it, we
@@ -496,6 +473,13 @@ static void __init free_unused_memmap(struct meminfo *mi)
                 */
                bank_start = min(bank_start,
                                 ALIGN(prev_bank_end, PAGES_PER_SECTION));
+#else
+               /*
+                * Align down here since the VM subsystem insists that the
+                * memmap entries are valid from the bank start aligned to
+                * MAX_ORDER_NR_PAGES.
+                */
+               bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
 #endif
                /*
                 * If we had a previous bank, and there is a space
@@ -653,9 +637,6 @@ void __init mem_init(void)
                        "    ITCM    : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 #endif
                        "    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
-#ifdef CONFIG_MMU
-                       "    DMA     : 0x%08lx - 0x%08lx   (%4ld MB)\n"
-#endif
                        "    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
                        "    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 #ifdef CONFIG_HIGHMEM
@@ -674,9 +655,6 @@ void __init mem_init(void)
                        MLK(ITCM_OFFSET, (unsigned long) itcm_end),
 #endif
                        MLK(FIXADDR_START, FIXADDR_TOP),
-#ifdef CONFIG_MMU
-                       MLM(CONSISTENT_BASE, CONSISTENT_END),
-#endif
                        MLM(VMALLOC_START, VMALLOC_END),
                        MLM(PAGE_OFFSET, (unsigned long)high_memory),
 #ifdef CONFIG_HIGHMEM
@@ -699,9 +677,6 @@ void __init mem_init(void)
         * be detected at build time already.
         */
 #ifdef CONFIG_MMU
-       BUILD_BUG_ON(VMALLOC_END                        > CONSISTENT_BASE);
-       BUG_ON(VMALLOC_END                              > CONSISTENT_BASE);
-
        BUILD_BUG_ON(TASK_SIZE                          > MODULES_VADDR);
        BUG_ON(TASK_SIZE                                > MODULES_VADDR);
 #endif