From: Will Deacon will@kernel.org
commit 51696d346c49c6cf4f29e9b20d6e15832a2e3408 upstream.
05f2d2f83b5a ("arm64: tlbflush: Introduce __flush_tlb_kernel_pgtable") added a new TLB invalidation helper which is used when freeing intermediate levels of page table used for kernel mappings, but is missing the required ISB instruction after completion of the TLBI instruction.
Add the missing barrier.
Cc: stable@vger.kernel.org Fixes: 05f2d2f83b5a ("arm64: tlbflush: Introduce __flush_tlb_kernel_pgtable") Reviewed-by: Mark Rutland mark.rutland@arm.com Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm64/include/asm/tlbflush.h | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arm64/include/asm/tlbflush.h +++ b/arch/arm64/include/asm/tlbflush.h @@ -224,6 +224,7 @@ static inline void __flush_tlb_kernel_pg
__tlbi(vaae1is, addr); dsb(ish); + isb(); } #endif