Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...

[deliverable/linux.git] / mm / memblock.c

diff --git a/mm/memblock.c b/mm/memblock.c
index 77b5f227e1d86d9228ae6a67f52f18418a2beb98..a44eab3157f8dc4b25e686b643ccacbc8449e041 100644 (file)
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -99,9 +99,6 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
        phys_addr_t this_start, this_end, cand;
        u64 i;
 
-       /* align @size to avoid excessive fragmentation on reserved array */
-       size = round_up(size, align);
-
        /* pump up @end */
        if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
                end = memblock.current_limit;
@@ -333,6 +330,9 @@ static int __init_memblock memblock_add_region(struct memblock_type *type,
        phys_addr_t end = base + memblock_cap_size(base, &size);
        int i, nr_new;
 
+       if (!size)
+               return 0;
+
        /* special case for empty array */
        if (type->regions[0].size == 0) {
                WARN_ON(type->cnt != 1 || type->total_size);
@@ -433,6 +433,9 @@ static int __init_memblock memblock_isolate_range(struct memblock_type *type,
 
        *start_rgn = *end_rgn = 0;
 
+       if (!size)
+               return 0;
+
        /* we'll create at most two more regions */
        while (type->cnt + 2 > type->max)
                if (memblock_double_array(type) < 0)
@@ -517,7 +520,6 @@ int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size)
                     (unsigned long long)base,
                     (unsigned long long)base + size,
                     (void *)_RET_IP_);
-       BUG_ON(0 == size);
 
        return memblock_add_region(_rgn, base, size, MAX_NUMNODES);
 }
@@ -731,6 +733,9 @@ static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
 {
        phys_addr_t found;
 
+       /* align @size to avoid excessive fragmentation on reserved array */
+       size = round_up(size, align);
+
        found = memblock_find_in_range_node(0, max_addr, size, align, nid);
        if (found && !memblock_reserve(found, size))
                return found;