From eb6a4dcce33925ac95023bbe5199474f8db40ba7 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Fri, 23 Aug 2019 13:03:55 +0100 Subject: arm64: mm: Add ISB instruction to set_pgd() Commit 6a4cbd63c25a ("Revert "arm64: Remove unnecessary ISBs from set_{pte,pmd,pud}"") reintroduced ISB instructions to some of our page table setter functions in light of a recent clarification to the Armv8 architecture. Although 'set_pgd()' isn't currently used to update a live page table, add the ISB instruction there too for consistency with the other macros and to provide some future-proofing if we use it on live tables in the future. Reported-by: Mark Rutland Reviewed-by: Mark Rutland Signed-off-by: Will Deacon --- arch/arm64/include/asm/pgtable.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm64/include/asm/pgtable.h') diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index feda7294320c..2faa77635942 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -605,6 +605,7 @@ static inline void set_pgd(pgd_t *pgdp, pgd_t pgd) WRITE_ONCE(*pgdp, pgd); dsb(ishst); + isb(); } static inline void pgd_clear(pgd_t *pgdp) -- cgit v1.2.3-59-g8ed1b