diff options
Diffstat (limited to 'include/asm-mips64/pgtable.h')
| -rw-r--r-- | include/asm-mips64/pgtable.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/asm-mips64/pgtable.h b/include/asm-mips64/pgtable.h index e3f688c8a..6e6212a06 100644 --- a/include/asm-mips64/pgtable.h +++ b/include/asm-mips64/pgtable.h @@ -64,6 +64,11 @@ do { \ * that the failure is recognized later on. Linux does not seem to * handle these failures very well though. The empty_bad_page_table has * invalid pte entries in it, to force page faults. + * Vmalloc handling: vmalloc uses swapper_pg_dir[0] (returned by + * pgd_offset_k), which is initalized to point to kpmdtbl. kpmdtbl is + * the only single page pmd in the system. kpmdtbl entries point into + * kptbl[] array. We reserve 1<<KPTBL_PAGE_ORDER pages to hold the + * vmalloc range translations, which the fault handler looks at. */ #endif /* !defined (_LANGUAGE_ASSEMBLY) */ @@ -442,7 +447,7 @@ extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #define page_pte(page) page_pte_prot(page, __pgprot(0)) /* to find an entry in a kernel page-table-directory */ -#define pgd_offset_k(address) pgd_offset(&init_mm, address) +#define pgd_offset_k(address) pgd_offset(&init_mm, 0) #define pgd_index(address) ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |