Update linux-mm-1.md

MM/linux-mm-1.md

@@ -124,7 +124,7 @@ Here we can see initialization of the `memblock` structure which has the same na
 
 You can see that it depends on `CONFIG_ARCH_DISCARD_MEMBLOCK`. If this configuration option is enabled, memblock code will be put into the `.init` section and will be released after the kernel is booted up.
 
-Next we can see the initialization of the `memblock_type memory`, `memblock_type reserved` and `memblock_type physmem` fields of the `memblock` structure. Here we are interested only in the `memblock_type.regions` initialization process. Note that every `memblock_type` field is initialized by and array of `memblock_region`s:
+Next we can see the initialization of the `memblock_type memory`, `memblock_type reserved` and `memblock_type physmem` fields of the `memblock` structure. Here we are interested only in the `memblock_type.regions` initialization process. Note that every `memblock_type` field is initialized by an array of `memblock_region`s:
 
 ```C
 static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;