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loongarch: drop definition of PGD_ORDER

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This is the order of the page table allocation, not the order of a PGD. 
Since its always hardwired to 0, simply drop it.

[rppt@linux.ibm.com: drop extra BLANK() line in arch/loongarch/kernel/asm-offsets.c]
  Link: https://lkml.kernel.org/r/20220705154708.181258-13-rppt@kernel.org
Link: https://lkml.kernel.org/r/20220703141203.147893-13-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Huacai Chen <chenhuacai@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Xuerui Wang <kernel@xen0n.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2022-07-03 17:12:01 +03:00 committed by akpm
parent f05ecc6869
commit 418d5dadaf
3 changed files with 3 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
arch/loongarch/include/asm/pgtable.h
View file

@ -21,8 +21,6 @@
#include <asm-generic/pgtable-nop4d.h>
#endif
#define PGD_ORDER 0
#if CONFIG_PGTABLE_LEVELS == 2
#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - 3))
#elif CONFIG_PGTABLE_LEVELS == 3
@ -43,9 +41,9 @@
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
#define VA_BITS (PGDIR_SHIFT + (PAGE_SHIFT + PGD_ORDER - 3))
#define VA_BITS (PGDIR_SHIFT + (PAGE_SHIFT - 3))
#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) >> 3)
#define PTRS_PER_PGD (PAGE_SIZE >> 3)
#if CONFIG_PGTABLE_LEVELS > 3
#define PTRS_PER_PUD (PAGE_SIZE >> 3)
#endif

2
arch/loongarch/kernel/asm-offsets.c
View file

@ -190,8 +190,6 @@ void output_mm_defines(void)
#endif
DEFINE(_PTE_T_LOG2, PTE_T_LOG2);
BLANK();
DEFINE(_PGD_ORDER, PGD_ORDER);
BLANK();
DEFINE(_PMD_SHIFT, PMD_SHIFT);
DEFINE(_PGDIR_SHIFT, PGDIR_SHIFT);
BLANK();

2
arch/loongarch/mm/pgtable.c
View file

@ -13,7 +13,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *ret, *init;
ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
ret = (pgd_t *) __get_free_page(GFP_KERNEL);
if (ret) {
init = pgd_offset(&init_mm, 0UL);
pgd_init((unsigned long)ret);