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Merge pull request #604 from douliyang/patch-9

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Update linux-mm-1.md
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@ -163,7 +163,7 @@ This function takes a physical base address and the size of the memory region as
memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0);
```
function. We pass the memory block type - `memory`, the physical base address and the size of the memory region, the maximum number of nodes which is 1 if `CONFIG_NODES_SHIFT` is not set in the configuration file or `1 << CONFIG_NODES_SHIFT` if it is set, and the flags. The `memblock_add_range` function adds a new memory region to the memory block. It starts by checking the size of the given region and if it is zero it just returns. After this, `memblock_add_range` checks the existence of the memory regions in the `memblock` structure with the given `memblock_type`. If there are no memory regions, we just fill new a `memory_region` with the given values and return (we already saw the implementation of this in the [First touch of the linux kernel memory manager framework](https://0xax.gitbooks.io/linux-insides/content/Initialization/linux-initialization-3.html)). If `memblock_type` is not empty, we start to add a new memory region to the `memblock` with the given `memblock_type`.
function. We pass the memory block type - `memory`, the physical base address and the size of the memory region, the maximum number of nodes which is 1 if `CONFIG_NODES_SHIFT` is not set in the configuration file or `1 << CONFIG_NODES_SHIFT` if it is set, and the flags. The `memblock_add_range` function adds a new memory region to the memory block. It starts by checking the size of the given region and if it is zero it just returns. After this, `memblock_add_range` checks the existence of the memory regions in the `memblock` structure with the given `memblock_type`. If there are no memory regions, we just fill a new `memory_region` with the given values and return (we already saw the implementation of this in the [First touch of the linux kernel memory manager framework](https://0xax.gitbooks.io/linux-insides/content/Initialization/linux-initialization-3.html)). If `memblock_type` is not empty, we start to add a new memory region to the `memblock` with the given `memblock_type`.
First of all we get the end of the memory region with the: