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x86/mm: Remove the unused mk_kernel_pgd() #define

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AFAICS the last uses of directly 'making' kernel PGDs was removed 7 years ago:

  8b78c21d72d9: ("x86, 64bit, mm: hibernate use generic mapping_init")

Where the explicit PGD walking loop was replaced with kernel_ident_mapping_init()
calls. This was then (unnecessarily) carried over through the 5-level paging conversion.

Also clean up the 'level' comments a bit, to convey the original, meanwhile somewhat
bit-rotten notion, that these are empty comment blocks with no methods to handle any
of the levels except the PTE level.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200724114418.629021-4-mingo@kernel.org
This commit is contained in:
Ingo Molnar 2020-07-24 13:44:18 +02:00
parent 161449bad5
commit 4b8e0328e5
1 changed files with 4 additions and 7 deletions
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11
arch/x86/include/asm/pgtable_64.h
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@ -175,16 +175,13 @@ extern void sync_global_pgds(unsigned long start, unsigned long end);
* and a page entry and page directory to the page they refer to.
*/
/*
* Level 4 access.
*/
#define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
/* PGD - Level 4 access */
/* PUD - Level3 access */
/* PUD - Level 3 access */
/* PMD - Level 2 access */
/* PMD - Level 2 access */
/* PTE - Level 1 access. */
/* PTE - Level 1 access */
/*
* Encode and de-code a swap entry