Pull novell-bugzilla-156426 into release branch

[pandora-kernel.git] / mm / bootmem.c

diff --git a/mm/bootmem.c b/mm/bootmem.c
index 16b9465..d213fed 100644 (file)
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -33,6 +33,7 @@ EXPORT_SYMBOL(max_pfn);               /* This is exported so
                                 * dma_get_required_mask(), which uses
                                 * it, can be an inline function */
 
+static LIST_HEAD(bdata_list);
 #ifdef CONFIG_CRASH_DUMP
 /*
  * If we have booted due to a crash, max_pfn will be a very low value. We need
@@ -52,6 +53,27 @@ unsigned long __init bootmem_bootmap_pages (unsigned long pages)
 
        return mapsize;
 }
+/*
+ * link bdata in order
+ */
+static void link_bootmem(bootmem_data_t *bdata)
+{
+       bootmem_data_t *ent;
+       if (list_empty(&bdata_list)) {
+               list_add(&bdata->list, &bdata_list);
+               return;
+       }
+       /* insert in order */
+       list_for_each_entry(ent, &bdata_list, list) {
+               if (bdata->node_boot_start < ent->node_boot_start) {
+                       list_add_tail(&bdata->list, &ent->list);
+                       return;
+               }
+       }
+       list_add_tail(&bdata->list, &bdata_list);
+       return;
+}
+
 
 /*
  * Called once to set up the allocator itself.
@@ -62,13 +84,11 @@ static unsigned long __init init_bootmem_core (pg_data_t *pgdat,
        bootmem_data_t *bdata = pgdat->bdata;
        unsigned long mapsize = ((end - start)+7)/8;
 
-       pgdat->pgdat_next = pgdat_list;
-       pgdat_list = pgdat;
-
        mapsize = ALIGN(mapsize, sizeof(long));
        bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT);
        bdata->node_boot_start = (start << PAGE_SHIFT);
        bdata->node_low_pfn = end;
+       link_bootmem(bdata);
 
        /*
         * Initially all pages are reserved - setup_arch() has to
@@ -152,7 +172,7 @@ static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
  *
  * NOTE:  This function is _not_ reentrant.
  */
-static void * __init
+void * __init
 __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size,
              unsigned long align, unsigned long goal, unsigned long limit)
 {
@@ -296,20 +316,12 @@ static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat)
                unsigned long v = ~map[i / BITS_PER_LONG];
 
                if (gofast && v == ~0UL) {
-                       int j, order;
+                       int order;
 
                        page = pfn_to_page(pfn);
                        count += BITS_PER_LONG;
-                       __ClearPageReserved(page);
                        order = ffs(BITS_PER_LONG) - 1;
-                       set_page_refs(page, order);
-                       for (j = 1; j < BITS_PER_LONG; j++) {
-                               if (j + 16 < BITS_PER_LONG)
-                                       prefetchw(page + j + 16);
-                               __ClearPageReserved(page + j);
-                               set_page_count(page + j, 0);
-                       }
-                       __free_pages(page, order);
+                       __free_pages_bootmem(page, order);
                        i += BITS_PER_LONG;
                        page += BITS_PER_LONG;
                } else if (v) {
@@ -319,9 +331,7 @@ static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat)
                        for (m = 1; m && i < idx; m<<=1, page++, i++) {
                                if (v & m) {
                                        count++;
-                                       __ClearPageReserved(page);
-                                       set_page_refs(page, 0);
-                                       __free_page(page);
+                                       __free_pages_bootmem(page, 0);
                                }
                        }
                } else {
@@ -339,9 +349,7 @@ static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat)
        count = 0;
        for (i = 0; i < ((bdata->node_low_pfn-(bdata->node_boot_start >> PAGE_SHIFT))/8 + PAGE_SIZE-1)/PAGE_SIZE; i++,page++) {
                count++;
-               __ClearPageReserved(page);
-               set_page_count(page, 1);
-               __free_page(page);
+               __free_pages_bootmem(page, 0);
        }
        total += count;
        bdata->node_bootmem_map = NULL;
@@ -393,17 +401,22 @@ unsigned long __init free_all_bootmem (void)
        return(free_all_bootmem_core(NODE_DATA(0)));
 }
 
-void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, unsigned long goal,
-                               unsigned long limit)
+void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, unsigned long goal)
 {
-       pg_data_t *pgdat = pgdat_list;
+       bootmem_data_t *bdata;
        void *ptr;
 
-       for_each_pgdat(pgdat)
-               if ((ptr = __alloc_bootmem_core(pgdat->bdata, size,
-                                                align, goal, limit)))
+       list_for_each_entry(bdata, &bdata_list, list)
+               if ((ptr = __alloc_bootmem_core(bdata, size, align, goal, 0)))
                        return(ptr);
+       return NULL;
+}
 
+void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal)
+{
+       void *mem = __alloc_bootmem_nopanic(size,align,goal);
+       if (mem)
+               return mem;
        /*
         * Whoops, we cannot satisfy the allocation request.
         */
@@ -413,15 +426,40 @@ void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, un
 }
 
 
-void * __init __alloc_bootmem_node_limit (pg_data_t *pgdat, unsigned long size, unsigned long align,
-                                    unsigned long goal, unsigned long limit)
+void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, unsigned long align,
+                                  unsigned long goal)
 {
        void *ptr;
 
-       ptr = __alloc_bootmem_core(pgdat->bdata, size, align, goal, limit);
+       ptr = __alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
        if (ptr)
                return (ptr);
 
-       return __alloc_bootmem_limit(size, align, goal, limit);
+       return __alloc_bootmem(size, align, goal);
 }
 
+#define LOW32LIMIT 0xffffffff
+
+void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, unsigned long goal)
+{
+       bootmem_data_t *bdata;
+       void *ptr;
+
+       list_for_each_entry(bdata, &bdata_list, list)
+               if ((ptr = __alloc_bootmem_core(bdata, size,
+                                                align, goal, LOW32LIMIT)))
+                       return(ptr);
+
+       /*
+        * Whoops, we cannot satisfy the allocation request.
+        */
+       printk(KERN_ALERT "low bootmem alloc of %lu bytes failed!\n", size);
+       panic("Out of low memory");
+       return NULL;
+}
+
+void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
+                                      unsigned long align, unsigned long goal)
+{
+       return __alloc_bootmem_core(pgdat->bdata, size, align, goal, LOW32LIMIT);
+}