Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 fixes from Catalin Marinas:
 "Fixes for duplicate definition of early_console, kernel/time/Kconfig
  include, __flush_dcache_all() set/way computing, debug (locking, bit
  testing).  The of_platform_populate() was moved to an arch_init_call()
  to allow subsys_init_call() drivers to probe the DT."

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: debug: fix mdscr.ss check when enabling debug exceptions
  arm64: Do not source kernel/time/Kconfig explicitly
  arm64: mm: Fix operands of clz in __flush_dcache_all
  arm64: Invoke the of_platform_populate() at arch_initcall() level
  arm64: debug: clear mdscr_el1 instead of taking the OS lock
  arm64: Fix duplicate definition of early_console

7 files changed, 9 insertions, 19 deletions

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 48347dcf0566..56b3f6d447ae 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -122,8 +122,6 @@ endmenu
 
 menu "Kernel Features"
 
-source "kernel/time/Kconfig"
-
 config ARM64_64K_PAGES
         bool "Enable 64KB pages support"
         help
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index c8eedc604984..5aceb83b3f5c 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -82,7 +82,7 @@
 
         .macro  enable_dbg_if_not_stepping, tmp
         mrs     \tmp, mdscr_el1
-        tbnz    \tmp, #1, 9990f
+        tbnz    \tmp, #0, 9990f
         enable_dbg
 9990:
         .endm
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index 0c3ba9f51376..f4726dc054b3 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -136,8 +136,6 @@ void disable_debug_monitors(enum debug_el el)
  */
 static void clear_os_lock(void *unused)
 {
-        asm volatile("msr mdscr_el1, %0" : : "r" (0));
-        isb();
         asm volatile("msr oslar_el1, %0" : : "r" (0));
         isb();
 }
diff --git a/arch/arm64/kernel/early_printk.c b/arch/arm64/kernel/early_printk.c
index ac974f48a7a2..fbb6e1843659 100644
--- a/arch/arm64/kernel/early_printk.c
+++ b/arch/arm64/kernel/early_printk.c
@@ -95,7 +95,7 @@ static void early_write(struct console *con, const char *s, unsigned n)
         }
 }
 
-static struct console early_console = {
+static struct console early_console_dev = {
         .name =         "earlycon",
         .write =        early_write,
         .flags =        CON_PRINTBUFFER | CON_BOOT,
@@ -145,7 +145,8 @@ static int __init setup_early_printk(char *buf)
                 early_base = early_io_map(paddr, EARLYCON_IOBASE);
 
         printch = match->printch;
-        register_console(&early_console);
+        early_console = &early_console_dev;
+        register_console(&early_console_dev);
 
         return 0;
 }
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 6a9a53292590..add6ea616843 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -282,12 +282,13 @@ void __init setup_arch(char **cmdline_p)
 #endif
 }
 
-static int __init arm64_of_clk_init(void)
+static int __init arm64_device_init(void)
 {
         of_clk_init(NULL);
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
         return 0;
 }
-arch_initcall(arm64_of_clk_init);
+arch_initcall(arm64_device_init);
 
 static DEFINE_PER_CPU(struct cpu, cpu_data);
 
@@ -305,13 +306,6 @@ static int __init topology_init(void)
 }
 subsys_initcall(topology_init);
 
-static int __init arm64_device_probe(void)
-{
-        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
-        return 0;
-}
-device_initcall(arm64_device_probe);
-
 static const char *hwcap_str[] = {
         "fp",
         "asimd",
diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S
index abe69b80cf7f..48a386094fa3 100644
--- a/arch/arm64/mm/cache.S
+++ b/arch/arm64/mm/cache.S
@@ -52,7 +52,7 @@ loop1:
         add     x2, x2, #4                      // add 4 (line length offset)
         mov     x4, #0x3ff
         and     x4, x4, x1, lsr #3              // find maximum number on the way size
-        clz     x5, x4                          // find bit position of way size increment
+        clz     w5, w4                          // find bit position of way size increment
         mov     x7, #0x7fff
         and     x7, x7, x1, lsr #13             // extract max number of the index size
 loop2:
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index f1d8b9bbfdad..a82ae8868077 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -119,8 +119,7 @@ ENTRY(__cpu_setup)
 
         mov     x0, #3 << 20
         msr     cpacr_el1, x0                   // Enable FP/ASIMD
-        mov     x0, #1
-        msr     oslar_el1, x0                   // Set the debug OS lock
+        msr     mdscr_el1, xzr                  // Reset mdscr_el1
         tlbi    vmalle1is                       // invalidate I + D TLBs
         /*
          * Memory region attributes for LPAE: