x86: move find_max_low_pfn to init_32.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 88 insertions, 78 deletions

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 3149f434d7d0..13155009ce94 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -129,9 +129,6 @@ unsigned int BIOS_revision;
 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
 int bootloader_type;
 
-/* user-defined highmem size */
-static unsigned int highmem_pages = -1;
-
 /*
  * Early DMI memory
  */
@@ -188,21 +185,6 @@ static inline void copy_edd(void)
 #endif
 
 /*
- * highmem=size forces highmem to be exactly 'size' bytes.
- * This works even on boxes that have no highmem otherwise.
- * This also works to reduce highmem size on bigger boxes.
- */
-static int __init parse_highmem(char *arg)
-{
-        if (!arg)
-                return -EINVAL;
-
-        highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
-        return 0;
-}
-early_param("highmem", parse_highmem);
-
-/*
  * 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.
@@ -235,65 +217,6 @@ static int __init parse_reservetop(char *arg)
 }
 early_param("reservetop", parse_reservetop);
 
-/*
- * Determine low and high memory ranges:
- */
-unsigned long __init find_max_low_pfn(void)
-{
-        unsigned long max_low_pfn;
-
-        max_low_pfn = max_pfn;
-        if (max_low_pfn > MAXMEM_PFN) {
-                if (highmem_pages == -1)
-                        highmem_pages = max_pfn - MAXMEM_PFN;
-                if (highmem_pages + MAXMEM_PFN < max_pfn)
-                        max_pfn = MAXMEM_PFN + highmem_pages;
-                if (highmem_pages + MAXMEM_PFN > max_pfn) {
-                        printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
-                        highmem_pages = 0;
-                }
-                max_low_pfn = MAXMEM_PFN;
-#ifndef CONFIG_HIGHMEM
-                /* Maximum memory usable is what is directly addressable */
-                printk(KERN_WARNING "Warning only %ldMB will be used.\n",
-                                        MAXMEM>>20);
-                if (max_pfn > MAX_NONPAE_PFN)
-                        printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
-                else
-                        printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
-                max_pfn = MAXMEM_PFN;
-#else /* !CONFIG_HIGHMEM */
-#ifndef CONFIG_HIGHMEM64G
-                if (max_pfn > MAX_NONPAE_PFN) {
-                        max_pfn = MAX_NONPAE_PFN;
-                        printk(KERN_WARNING "Warning only 4GB will be used.\n");
-                        printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
-                }
-#endif /* !CONFIG_HIGHMEM64G */
-#endif /* !CONFIG_HIGHMEM */
-        } else {
-                if (highmem_pages == -1)
-                        highmem_pages = 0;
-#ifdef CONFIG_HIGHMEM
-                if (highmem_pages >= max_pfn) {
-                        printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
-                        highmem_pages = 0;
-                }
-                if (highmem_pages) {
-                        if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
-                                printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
-                                highmem_pages = 0;
-                        }
-                        max_low_pfn -= highmem_pages;
-                }
-#else
-                if (highmem_pages)
-                        printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
-#endif
-        }
-        return max_low_pfn;
-}
-
 #ifdef CONFIG_BLK_DEV_INITRD
 
 static bool do_relocate_initrd = false;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 98080782ee47..d1017336f1b5 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -540,8 +540,95 @@ static void __init set_nx(void)
 }
 #endif
 
+/* user-defined highmem size */
+static unsigned int highmem_pages = -1;
+
+/*
+ * highmem=size forces highmem to be exactly 'size' bytes.
+ * This works even on boxes that have no highmem otherwise.
+ * This also works to reduce highmem size on bigger boxes.
+ */
+static int __init parse_highmem(char *arg)
+{
+        if (!arg)
+                return -EINVAL;
+
+        highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
+        return 0;
+}
+early_param("highmem", parse_highmem);
+
+/*
+ * Determine low and high memory ranges:
+ */
+unsigned long __init find_max_low_pfn(void)
+{
+        unsigned long max_low_pfn;
+
+        max_low_pfn = max_pfn;
+        if (max_low_pfn > MAXMEM_PFN) {
+                if (highmem_pages == -1)
+                        highmem_pages = max_pfn - MAXMEM_PFN;
+                if (highmem_pages + MAXMEM_PFN < max_pfn)
+                        max_pfn = MAXMEM_PFN + highmem_pages;
+                if (highmem_pages + MAXMEM_PFN > max_pfn) {
+                        printk(KERN_WARNING "only %luMB highmem pages "
+                                "available, ignoring highmem size of %uMB.\n",
+                                pages_to_mb(max_pfn - MAXMEM_PFN),
+                                pages_to_mb(highmem_pages));
+                        highmem_pages = 0;
+                }
+                max_low_pfn = MAXMEM_PFN;
+#ifndef CONFIG_HIGHMEM
+                /* Maximum memory usable is what is directly addressable */
+                printk(KERN_WARNING "Warning only %ldMB will be used.\n",
+                                        MAXMEM>>20);
+                if (max_pfn > MAX_NONPAE_PFN)
+                        printk(KERN_WARNING
+                                 "Use a HIGHMEM64G enabled kernel.\n");
+                else
+                        printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
+                max_pfn = MAXMEM_PFN;
+#else /* !CONFIG_HIGHMEM */
+#ifndef CONFIG_HIGHMEM64G
+                if (max_pfn > MAX_NONPAE_PFN) {
+                        max_pfn = MAX_NONPAE_PFN;
+                        printk(KERN_WARNING "Warning only 4GB will be used."
+                                "Use a HIGHMEM64G enabled kernel.\n");
+                }
+#endif /* !CONFIG_HIGHMEM64G */
+#endif /* !CONFIG_HIGHMEM */
+        } else {
+                if (highmem_pages == -1)
+                        highmem_pages = 0;
+#ifdef CONFIG_HIGHMEM
+                if (highmem_pages >= max_pfn) {
+                        printk(KERN_ERR "highmem size specified (%uMB) is "
+                                "bigger than pages available (%luMB)!.\n",
+                                pages_to_mb(highmem_pages),
+                                pages_to_mb(max_pfn));
+                        highmem_pages = 0;
+                }
+                if (highmem_pages) {
+                        if (max_low_pfn - highmem_pages <
+                            64*1024*1024/PAGE_SIZE){
+                                printk(KERN_ERR "highmem size %uMB results in "
+                                "smaller than 64MB lowmem, ignoring it.\n"
+                                        , pages_to_mb(highmem_pages));
+                                highmem_pages = 0;
+                        }
+                        max_low_pfn -= highmem_pages;
+                }
+#else
+                if (highmem_pages)
+                        printk(KERN_ERR "ignoring highmem size on non-highmem"
+                                        " kernel!\n");
+#endif
+        }
+        return max_low_pfn;
+}
+
 #ifndef CONFIG_NEED_MULTIPLE_NODES
-extern unsigned long find_max_low_pfn(void);
 unsigned long __init initmem_init(unsigned long start_pfn,
                                   unsigned long end_pfn)
 {