arm64: mm: place empty_zero_page in bss

[firefly-linux-kernel-4.4.55.git] / arch / arm64 / kernel / head.S

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 4d37c413da4dea9f4f279c3de20f48b7c9a9a131..7d095f69bbb62b88f9cc7056b97ba0b5dc399cad 100644 (file)
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -421,6 +421,7 @@ __mmap_switched:
        adr_l   x2, __bss_stop
        sub     x2, x2, x0
        bl      __pi_memset
+       dsb     ishst                           // Make zero page visible to PTW
 
        adr_l   sp, initial_sp, x4
        str_l   x21, __fdt_pointer, x5          // Save FDT pointer