x86-32, numa: Make @size in init_aloc_remap() represent bytes

@size variable in init_alloc_remap() is confusing in that it starts as
number of bytes as its name implies and then becomes number of pages.
Make it consistently represent bytes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1301955840-7246-7-git-send-email-tj@kernel.org
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 30933fe..99310d2 100644 (file)
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -286,22 +286,19 @@ static __init unsigned long init_alloc_remap(int nid, unsigned long offset)
        size = node_remap_size[nid];
        size += ALIGN(sizeof(pg_data_t), PAGE_SIZE);
 
-       /* convert size to large (pmd size) pages, rounding up */
-       size = (size + LARGE_PAGE_BYTES - 1) / LARGE_PAGE_BYTES;
-       /* now the roundup is correct, convert to PAGE_SIZE pages */
-       size = size * PTRS_PER_PTE;
+       /* align to large page */
+       size = ALIGN(size, LARGE_PAGE_BYTES);
 
        node_pa = memblock_find_in_range(node_start_pfn[nid] << PAGE_SHIFT,
                                         (u64)node_end_pfn[nid] << PAGE_SHIFT,
-                                        (u64)size << PAGE_SHIFT,
-                                        LARGE_PAGE_BYTES);
+                                        size, LARGE_PAGE_BYTES);
        if (node_pa == MEMBLOCK_ERROR)
                panic("Can not get kva ram\n");
 
-       node_remap_size[nid] = size;
+       node_remap_size[nid] = size >> PAGE_SHIFT;
        node_remap_offset[nid] = offset;
        printk(KERN_DEBUG "Reserving %ld pages of KVA for lmem_map of node %d at %llx\n",
-              size, nid, node_pa >> PAGE_SHIFT);
+              size >> PAGE_SHIFT, nid, node_pa >> PAGE_SHIFT);
 
        /*
         *  prevent kva address below max_low_pfn want it on system
@@ -315,12 +312,11 @@ static __init unsigned long init_alloc_remap(int nid, unsigned long offset)
         *  So memblock_x86_reserve_range here, hope we don't run out
         *  of that array
         */
-       memblock_x86_reserve_range(node_pa, node_pa + ((u64)size << PAGE_SHIFT),
-                                  "KVA RAM");
+       memblock_x86_reserve_range(node_pa, node_pa + size, "KVA RAM");
 
        node_remap_start_pfn[nid] = node_pa >> PAGE_SHIFT;
 
-       return size;
+       return size >> PAGE_SHIFT;
 }
 
 static void init_remap_allocator(int nid)