diff options
Diffstat (limited to 'arch/arm64/mm/pgd.c')
| -rw-r--r-- | arch/arm64/mm/pgd.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/arm64/mm/pgd.c b/arch/arm64/mm/pgd.c index 371c5f03a170..289f9113a27a 100644 --- a/arch/arm64/mm/pgd.c +++ b/arch/arm64/mm/pgd.c @@ -26,7 +26,7 @@ #include <asm/page.h> #include <asm/tlbflush.h> -static struct kmem_cache *pgd_cache; +static struct kmem_cache *pgd_cache __ro_after_init; pgd_t *pgd_alloc(struct mm_struct *mm) { @@ -49,6 +49,14 @@ void __init pgd_cache_init(void) if (PGD_SIZE == PAGE_SIZE) return; +#ifdef CONFIG_ARM64_PA_BITS_52 + /* + * With 52-bit physical addresses, the architecture requires the + * top-level table to be aligned to at least 64 bytes. + */ + BUILD_BUG_ON(PGD_SIZE < 64); +#endif + /* * Naturally aligned pgds required by the architecture. */ |