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Fix nit in Paging file
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@ -80,7 +80,7 @@ These fields have the following meanings:
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* Bits 63:52 - reserved must be 0.
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* Bits 63:52 - reserved must be 0.
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* Bits 51:12 - stores the address of the top level paging structure;
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* Bits 51:12 - stores the address of the top level paging structure;
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* Reserved - reserved must be 0;
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* Bits 11: 5 - reserved must be 0;
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* Bits 4 : 3 - PWT or Page-Level Writethrough and PCD or Page-level cache disable indicate. These bits control the way the page or Page Table is handled by the hardware cache;
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* Bits 4 : 3 - PWT or Page-Level Writethrough and PCD or Page-level cache disable indicate. These bits control the way the page or Page Table is handled by the hardware cache;
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* Bits 2 : 0 - ignored;
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* Bits 2 : 0 - ignored;
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@ -95,7 +95,7 @@ schematically, we can imagine it like this:
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![4-level paging](http://oi58.tinypic.com/207mb0x.jpg)
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![4-level paging](http://oi58.tinypic.com/207mb0x.jpg)
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Every access to a linear address is either a supervisor-mode access or a user-mode access. This access is determined by the `CPL` (current privilege level). If `CPL < 3` it is a supervisor mode access level, otherwise it is a user mode access level. For example, the top level page table entry contains access bits and has the following structure:
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Every access to a linear address is either a supervisor-mode access or a user-mode access. This access is determined by the `CPL` (current privilege level). If `CPL < 3` it is a supervisor mode access level, otherwise it is a user mode access level. For example, the top level page table entry contains access bits and has the following structure (See [arch/x86/include/asm/pgtable_types.h](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/include/asm/pgtable_types.h) for the bit offset definitions):
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```
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```
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63 62 52 51 32
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63 62 52 51 32
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