mm/bootmem.c: properly __init-annotate helper functions

[safe/jmp/linux-2.6] / mm / bootmem.c

diff --git a/mm/bootmem.c b/mm/bootmem.c
index 51a0ccf..7d14868 100644 (file)
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -12,6 +12,7 @@
 #include <linux/pfn.h>
 #include <linux/bootmem.h>
 #include <linux/module.h>
+#include <linux/kmemleak.h>
 
 #include <asm/bug.h>
 #include <asm/io.h>
@@ -142,6 +143,30 @@ unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
        return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
 }
 
+/*
+ * free_bootmem_late - free bootmem pages directly to page allocator
+ * @addr: starting address of the range
+ * @size: size of the range in bytes
+ *
+ * This is only useful when the bootmem allocator has already been torn
+ * down, but we are still initializing the system.  Pages are given directly
+ * to the page allocator, no bootmem metadata is updated because it is gone.
+ */
+void __init free_bootmem_late(unsigned long addr, unsigned long size)
+{
+       unsigned long cursor, end;
+
+       kmemleak_free_part(__va(addr), size);
+
+       cursor = PFN_UP(addr);
+       end = PFN_DOWN(addr + size);
+
+       for (; cursor < end; cursor++) {
+               __free_pages_bootmem(pfn_to_page(cursor), 0);
+               totalram_pages++;
+       }
+}
+
 static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
 {
        int aligned;
@@ -335,6 +360,8 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
 {
        unsigned long start, end;
 
+       kmemleak_free_part(__va(physaddr), size);
+
        start = PFN_UP(physaddr);
        end = PFN_DOWN(physaddr + size);
 
@@ -354,6 +381,8 @@ void __init free_bootmem(unsigned long addr, unsigned long size)
 {
        unsigned long start, end;
 
+       kmemleak_free_part(__va(addr), size);
+
        start = PFN_UP(addr);
        end = PFN_DOWN(addr + size);
 
@@ -382,7 +411,6 @@ int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
        return mark_bootmem_node(pgdat->bdata, start, end, 1, flags);
 }
 
-#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
 /**
  * reserve_bootmem - mark a page range as usable
  * @addr: starting address of the range
@@ -403,10 +431,9 @@ int __init reserve_bootmem(unsigned long addr, unsigned long size,
 
        return mark_bootmem(start, end, 1, flags);
 }
-#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
 
-static unsigned long align_idx(struct bootmem_data *bdata, unsigned long idx,
-                       unsigned long step)
+static unsigned long __init align_idx(struct bootmem_data *bdata,
+                                     unsigned long idx, unsigned long step)
 {
        unsigned long base = bdata->node_min_pfn;
 
@@ -418,8 +445,8 @@ static unsigned long align_idx(struct bootmem_data *bdata, unsigned long idx,
        return ALIGN(base + idx, step) - base;
 }
 
-static unsigned long align_off(struct bootmem_data *bdata, unsigned long off,
-                       unsigned long align)
+static unsigned long __init align_off(struct bootmem_data *bdata,
+                                     unsigned long off, unsigned long align)
 {
        unsigned long base = PFN_PHYS(bdata->node_min_pfn);
 
@@ -429,8 +456,8 @@ static unsigned long align_off(struct bootmem_data *bdata, unsigned long off,
 }
 
 static void * __init alloc_bootmem_core(struct bootmem_data *bdata,
-                               unsigned long size, unsigned long align,
-                               unsigned long goal, unsigned long limit)
+                                       unsigned long size, unsigned long align,
+                                       unsigned long goal, unsigned long limit)
 {
        unsigned long fallback = 0;
        unsigned long min, max, start, sidx, midx, step;
@@ -518,6 +545,11 @@ find_block:
                region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) +
                                start_off);
                memset(region, 0, size);
+               /*
+                * The min_count is set to 0 so that bootmem allocated blocks
+                * are never reported as leaks.
+                */
+               kmemleak_alloc(region, size, 0, 0);
                return region;
        }
 
@@ -530,17 +562,41 @@ find_block:
        return NULL;
 }
 
+static void * __init alloc_arch_preferred_bootmem(bootmem_data_t *bdata,
+                                       unsigned long size, unsigned long align,
+                                       unsigned long goal, unsigned long limit)
+{
+       if (WARN_ON_ONCE(slab_is_available()))
+               return kzalloc(size, GFP_NOWAIT);
+
+#ifdef CONFIG_HAVE_ARCH_BOOTMEM
+       {
+               bootmem_data_t *p_bdata;
+
+               p_bdata = bootmem_arch_preferred_node(bdata, size, align,
+                                                       goal, limit);
+               if (p_bdata)
+                       return alloc_bootmem_core(p_bdata, size, align,
+                                                       goal, limit);
+       }
+#endif
+       return NULL;
+}
+
 static void * __init ___alloc_bootmem_nopanic(unsigned long size,
                                        unsigned long align,
                                        unsigned long goal,
                                        unsigned long limit)
 {
        bootmem_data_t *bdata;
+       void *region;
 
 restart:
-       list_for_each_entry(bdata, &bdata_list, list) {
-               void *region;
+       region = alloc_arch_preferred_bootmem(NULL, size, align, goal, limit);
+       if (region)
+               return region;
 
+       list_for_each_entry(bdata, &bdata_list, list) {
                if (goal && bdata->node_low_pfn <= PFN_DOWN(goal))
                        continue;
                if (limit && bdata->node_min_pfn >= PFN_DOWN(limit))
@@ -618,6 +674,10 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
 {
        void *ptr;
 
+       ptr = alloc_arch_preferred_bootmem(bdata, size, align, goal, limit);
+       if (ptr)
+               return ptr;
+
        ptr = alloc_bootmem_core(bdata, size, align, goal, limit);
        if (ptr)
                return ptr;
@@ -643,6 +703,9 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
 void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
                                   unsigned long align, unsigned long goal)
 {
+       if (WARN_ON_ONCE(slab_is_available()))
+               return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
+
        return ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
 }
 
@@ -674,6 +737,13 @@ void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
 {
        void *ptr;
 
+       if (WARN_ON_ONCE(slab_is_available()))
+               return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
+
+       ptr = alloc_arch_preferred_bootmem(pgdat->bdata, size, align, goal, 0);
+       if (ptr)
+               return ptr;
+
        ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
        if (ptr)
                return ptr;
@@ -722,6 +792,9 @@ void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
 void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
                                       unsigned long align, unsigned long goal)
 {
+       if (WARN_ON_ONCE(slab_is_available()))
+               return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
+
        return ___alloc_bootmem_node(pgdat->bdata, size, align,
                                goal, ARCH_LOW_ADDRESS_LIMIT);
 }