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| author | Alexandre Ghiti <alexandre.ghiti@canonical.com> | 2021-12-06 11:46:50 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-01-20 02:54:08 +0100 |
| commit | 60639f74c2f4fcc3ffa2ac0b120eaa874ccc713f (patch) | |
| tree | fad7008b86a5a38798d7a3a64446cabbb58ee9ba /include/asm-generic/pgalloc.h | |
| parent | riscv: Allow to dynamically define VA_BITS (diff) | |
| download | linux-60639f74c2f4fcc3ffa2ac0b120eaa874ccc713f.tar.xz linux-60639f74c2f4fcc3ffa2ac0b120eaa874ccc713f.zip | |
asm-generic: Prepare for riscv use of pud_alloc_one and pud_free
In the following commits, riscv will almost use the generic versions of
pud_alloc_one and pud_free but an additional check is required since those
functions are only relevant when using at least a 4-level page table, which
will be determined at runtime on riscv.
So move the content of those functions into other functions that riscv
can use without duplicating code.
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'include/asm-generic/pgalloc.h')
| -rw-r--r-- | include/asm-generic/pgalloc.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h index 02932efad3ab..977bea16cf1b 100644 --- a/include/asm-generic/pgalloc.h +++ b/include/asm-generic/pgalloc.h @@ -147,6 +147,15 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) #if CONFIG_PGTABLE_LEVELS > 3 +static inline pud_t *__pud_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + gfp_t gfp = GFP_PGTABLE_USER; + + if (mm == &init_mm) + gfp = GFP_PGTABLE_KERNEL; + return (pud_t *)get_zeroed_page(gfp); +} + #ifndef __HAVE_ARCH_PUD_ALLOC_ONE /** * pud_alloc_one - allocate a page for PUD-level page table @@ -159,20 +168,23 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) */ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) { - gfp_t gfp = GFP_PGTABLE_USER; - - if (mm == &init_mm) - gfp = GFP_PGTABLE_KERNEL; - return (pud_t *)get_zeroed_page(gfp); + return __pud_alloc_one(mm, addr); } #endif -static inline void pud_free(struct mm_struct *mm, pud_t *pud) +static inline void __pud_free(struct mm_struct *mm, pud_t *pud) { BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); free_page((unsigned long)pud); } +#ifndef __HAVE_ARCH_PUD_FREE +static inline void pud_free(struct mm_struct *mm, pud_t *pud) +{ + __pud_free(mm, pud); +} +#endif + #endif /* CONFIG_PGTABLE_LEVELS > 3 */ #ifndef __HAVE_ARCH_PGD_FREE |