X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=arch%2Farm64%2Fkernel%2Fsetup.c;h=0153c0d8ddb18e9cf94a17db4e230617eaad2b7b;hb=662d618b983cd0566a1cc2ed28c09a0a4b07b9f3;hp=42371f69def3a3afc68a7f1a28d0e819e83c7837;hpb=e779279da78339ec75fa72571ef901a447762cc6;p=firefly-linux-kernel-4.4.55.git

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 42371f69def3..0153c0d8ddb1 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -175,7 +175,6 @@ static void __init smp_build_mpidr_hash(void)
 	 */
 	if (mpidr_hash_size() > 4 * num_possible_cpus())
 		pr_warn("Large number of MPIDR hash buckets detected\n");
-	__flush_dcache_area(&mpidr_hash, sizeof(struct mpidr_hash));
 }
 
 static void __init setup_machine_fdt(phys_addr_t dt_phys)
@@ -202,7 +201,7 @@ static void __init request_standard_resources(void)
 	struct resource *res;
 
 	kernel_code.start   = virt_to_phys(_text);
-	kernel_code.end     = virt_to_phys(_etext - 1);
+	kernel_code.end     = virt_to_phys(__init_begin - 1);
 	kernel_data.start   = virt_to_phys(_sdata);
 	kernel_data.end     = virt_to_phys(_end - 1);
 
@@ -347,6 +346,15 @@ void __init setup_arch(char **cmdline_p)
 	smp_init_cpus();
 	smp_build_mpidr_hash();
 
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+	/*
+	 * Make sure init_thread_info.ttbr0 always generates translation
+	 * faults in case uaccess_enable() is inadvertently called by the init
+	 * thread.
+	 */
+	init_thread_info.ttbr0 = virt_to_phys(empty_zero_page);
+#endif
+
 #ifdef CONFIG_VT
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;