diff options
Diffstat (limited to 'arch/arm64/kernel/mte.c')
| -rw-r--r-- | arch/arm64/kernel/mte.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c index 7467217c1eaf..84a085d536f8 100644 --- a/arch/arm64/kernel/mte.c +++ b/arch/arm64/kernel/mte.c @@ -41,8 +41,10 @@ static void mte_sync_page_tags(struct page *page, pte_t old_pte, if (check_swap && is_swap_pte(old_pte)) { swp_entry_t entry = pte_to_swp_entry(old_pte); - if (!non_swap_entry(entry) && mte_restore_tags(entry, page)) + if (!non_swap_entry(entry) && mte_restore_tags(entry, page)) { + set_page_mte_tagged(page); return; + } } if (!pte_is_tagged) @@ -52,8 +54,10 @@ static void mte_sync_page_tags(struct page *page, pte_t old_pte, * Test PG_mte_tagged again in case it was racing with another * set_pte_at(). */ - if (!test_and_set_bit(PG_mte_tagged, &page->flags)) + if (!page_mte_tagged(page)) { mte_clear_page_tags(page_address(page)); + set_page_mte_tagged(page); + } } void mte_sync_tags(pte_t old_pte, pte_t pte) @@ -69,9 +73,11 @@ void mte_sync_tags(pte_t old_pte, pte_t pte) /* if PG_mte_tagged is set, tags have already been initialised */ for (i = 0; i < nr_pages; i++, page++) { - if (!test_bit(PG_mte_tagged, &page->flags)) + if (!page_mte_tagged(page)) { mte_sync_page_tags(page, old_pte, check_swap, pte_is_tagged); + set_page_mte_tagged(page); + } } /* ensure the tags are visible before the PTE is set */ @@ -96,8 +102,7 @@ int memcmp_pages(struct page *page1, struct page *page2) * pages is tagged, set_pte_at() may zero or change the tags of the * other page via mte_sync_tags(). */ - if (test_bit(PG_mte_tagged, &page1->flags) || - test_bit(PG_mte_tagged, &page2->flags)) + if (page_mte_tagged(page1) || page_mte_tagged(page2)) return addr1 != addr2; return ret; @@ -454,7 +459,7 @@ static int __access_remote_tags(struct mm_struct *mm, unsigned long addr, put_page(page); break; } - WARN_ON_ONCE(!test_bit(PG_mte_tagged, &page->flags)); + WARN_ON_ONCE(!page_mte_tagged(page)); /* limit access to the end of the page */ offset = offset_in_page(addr); |