diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/kasan/kasan_init_32.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c index b7c287adfd59..91e2ade75192 100644 --- a/arch/powerpc/mm/kasan/kasan_init_32.c +++ b/arch/powerpc/mm/kasan/kasan_init_32.c @@ -5,9 +5,7 @@ #include <linux/kasan.h> #include <linux/printk.h> #include <linux/memblock.h> -#include <linux/moduleloader.h> #include <linux/sched/task.h> -#include <linux/vmalloc.h> #include <asm/pgalloc.h> #include <asm/code-patching.h> #include <mm/mmu_decl.h> @@ -34,31 +32,22 @@ static int __init kasan_init_shadow_page_tables(unsigned long k_start, unsigned { pmd_t *pmd; unsigned long k_cur, k_next; - pte_t *new = NULL; pmd = pmd_ptr_k(k_start); for (k_cur = k_start; k_cur != k_end; k_cur = k_next, pmd++) { + pte_t *new; + k_next = pgd_addr_end(k_cur, k_end); if ((void *)pmd_page_vaddr(*pmd) != kasan_early_shadow_pte) continue; - if (!new) - new = memblock_alloc(PTE_FRAG_SIZE, PTE_FRAG_SIZE); + new = memblock_alloc(PTE_FRAG_SIZE, PTE_FRAG_SIZE); if (!new) return -ENOMEM; kasan_populate_pte(new, PAGE_KERNEL); - - smp_wmb(); /* See comment in __pte_alloc */ - - spin_lock(&init_mm.page_table_lock); - /* Has another populated it ? */ - if (likely((void *)pmd_page_vaddr(*pmd) == kasan_early_shadow_pte)) { - pmd_populate_kernel(&init_mm, pmd, new); - new = NULL; - } - spin_unlock(&init_mm.page_table_lock); + pmd_populate_kernel(&init_mm, pmd, new); } return 0; } |