Merge drm/drm-next into drm-misc-next

Backmerging from drm/drm-next for v5.16-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

5 files changed, 40 insertions, 35 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 11f8a845f259..036b750e8d8a 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -885,6 +885,11 @@ config ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
 config CC_HAS_INT128
 	def_bool !$(cc-option,$(m64-flag) -D__SIZEOF_INT128__=0) && 64BIT
 
+config CC_IMPLICIT_FALLTHROUGH
+	string
+	default "-Wimplicit-fallthrough=5" if CC_IS_GCC
+	default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough)
+
 #
 # For architectures that know their GCC __int128 support is sound
 #
@@ -901,7 +906,7 @@ config NUMA_BALANCING
 	bool "Memory placement aware NUMA scheduler"
 	depends on ARCH_SUPPORTS_NUMA_BALANCING
 	depends on !ARCH_WANT_NUMA_VARIABLE_LOCALITY
-	depends on SMP && NUMA && MIGRATION
+	depends on SMP && NUMA && MIGRATION && !PREEMPT_RT
 	help
 	  This option adds support for automatic NUMA aware memory/task placement.
 	  The mechanism is quite primitive and is based on migrating memory when
@@ -1896,6 +1901,7 @@ choice
 
 config SLAB
 	bool "SLAB"
+	depends on !PREEMPT_RT
 	select HAVE_HARDENED_USERCOPY_ALLOCATOR
 	help
 	  The regular slab allocator that is established and known to work
@@ -1916,6 +1922,7 @@ config SLUB
 config SLOB
 	depends on EXPERT
 	bool "SLOB (Simple Allocator)"
+	depends on !PREEMPT_RT
 	help
 	   SLOB replaces the stock allocator with a drastically simpler
 	   allocator. SLOB is generally more space efficient but
diff --git a/init/Makefile b/init/Makefile
index 2846113677ee..04eeee12c076 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -30,7 +30,7 @@ $(obj)/version.o: include/generated/compile.h
 quiet_cmd_compile.h = CHK     $@
       cmd_compile.h = \
 	$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@	\
-	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)"	\
+	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT_BUILD)"	\
 	"$(CONFIG_PREEMPT_RT)" $(CONFIG_CC_VERSION_TEXT) "$(LD)"
 
 include/generated/compile.h: FORCE
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 2ed30ff6c906..762b534978d9 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -338,20 +338,19 @@ __setup("rootflags=", root_data_setup);
 __setup("rootfstype=", fs_names_setup);
 __setup("rootdelay=", root_delay_setup);
 
-static int __init split_fs_names(char *page, char *names)
+/* This can return zero length strings. Caller should check */
+static int __init split_fs_names(char *page, size_t size, char *names)
 {
-	int count = 0;
+	int count = 1;
 	char *p = page;
 
-	strcpy(p, root_fs_names);
+	strlcpy(p, root_fs_names, size);
 	while (*p++) {
-		if (p[-1] == ',')
+		if (p[-1] == ',') {
 			p[-1] = '\0';
+			count++;
+		}
 	}
-	*p = '\0';
-
-	for (p = page; *p; p += strlen(p)+1)
-		count++;
 
 	return count;
 }
@@ -404,12 +403,16 @@ void __init mount_block_root(char *name, int flags)
 	scnprintf(b, BDEVNAME_SIZE, "unknown-block(%u,%u)",
 		  MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
 	if (root_fs_names)
-		num_fs = split_fs_names(fs_names, root_fs_names);
+		num_fs = split_fs_names(fs_names, PAGE_SIZE, root_fs_names);
 	else
 		num_fs = list_bdev_fs_names(fs_names, PAGE_SIZE);
 retry:
 	for (i = 0, p = fs_names; i < num_fs; i++, p += strlen(p)+1) {
-		int err = do_mount_root(name, p, flags, root_mount_data);
+		int err;
+
+		if (!*p)
+			continue;
+		err = do_mount_root(name, p, flags, root_mount_data);
 		switch (err) {
 			case 0:
 				goto out;
@@ -543,19 +546,18 @@ static int __init mount_nodev_root(void)
 	fs_names = (void *)__get_free_page(GFP_KERNEL);
 	if (!fs_names)
 		return -EINVAL;
-	num_fs = split_fs_names(fs_names, root_fs_names);
+	num_fs = split_fs_names(fs_names, PAGE_SIZE, root_fs_names);
 
 	for (i = 0, fstype = fs_names; i < num_fs;
 	     i++, fstype += strlen(fstype) + 1) {
+		if (!*fstype)
+			continue;
 		if (!fs_is_nodev(fstype))
 			continue;
 		err = do_mount_root(root_device_name, fstype, root_mountflags,
 				    root_mount_data);
 		if (!err)
 			break;
-		if (err != -EACCES && err != -EINVAL)
-			panic("VFS: Unable to mount root \"%s\" (%s), err=%d\n",
-			      root_device_name, fstype, err);
 	}
 
 	free_page((unsigned long)fs_names);
diff --git a/init/initramfs.c b/init/initramfs.c
index a842c0544745..2f3d96dc3db6 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -607,7 +607,7 @@ void __weak __init free_initrd_mem(unsigned long start, unsigned long end)
 	unsigned long aligned_start = ALIGN_DOWN(start, PAGE_SIZE);
 	unsigned long aligned_end = ALIGN(end, PAGE_SIZE);
 
-	memblock_free(__pa(aligned_start), aligned_end - aligned_start);
+	memblock_free((void *)aligned_start, aligned_end - aligned_start);
 #endif
 
 	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
diff --git a/init/main.c b/init/main.c
index 3f7216934441..bb984ed79de0 100644
--- a/init/main.c
+++ b/init/main.c
@@ -83,7 +83,6 @@
 #include <linux/ptrace.h>
 #include <linux/pti.h>
 #include <linux/blkdev.h>
-#include <linux/elevator.h>
 #include <linux/sched/clock.h>
 #include <linux/sched/task.h>
 #include <linux/sched/task_stack.h>
@@ -382,6 +381,7 @@ static char * __init xbc_make_cmdline(const char *key)
 	ret = xbc_snprint_cmdline(new_cmdline, len + 1, root);
 	if (ret < 0 || ret > len) {
 		pr_err("Failed to print extra kernel cmdline.\n");
+		memblock_free(new_cmdline, len + 1);
 		return NULL;
 	}
 
@@ -409,7 +409,7 @@ static void __init setup_boot_config(void)
 	const char *msg;
 	int pos;
 	u32 size, csum;
-	char *data, *copy, *err;
+	char *data, *err;
 	int ret;
 
 	/* Cut out the bootconfig data even if we have no bootconfig option */
@@ -442,16 +442,7 @@ static void __init setup_boot_config(void)
 		return;
 	}
 
-	copy = memblock_alloc(size + 1, SMP_CACHE_BYTES);
-	if (!copy) {
-		pr_err("Failed to allocate memory for bootconfig\n");
-		return;
-	}
-
-	memcpy(copy, data, size);
-	copy[size] = '\0';
-
-	ret = xbc_init(copy, &msg, &pos);
+	ret = xbc_init(data, size, &msg, &pos);
 	if (ret < 0) {
 		if (pos < 0)
 			pr_err("Failed to init bootconfig: %s.\n", msg);
@@ -459,6 +450,7 @@ static void __init setup_boot_config(void)
 			pr_err("Failed to parse bootconfig: %s at %d.\n",
 				msg, pos);
 	} else {
+		xbc_get_info(&ret, NULL);
 		pr_info("Load bootconfig: %d bytes %d nodes\n", size, ret);
 		/* keys starting with "kernel." are passed via cmdline */
 		extra_command_line = xbc_make_cmdline("kernel");
@@ -470,7 +462,7 @@ static void __init setup_boot_config(void)
 
 static void __init exit_boot_config(void)
 {
-	xbc_destroy_all();
+	xbc_exit();
 }
 
 #else	/* !CONFIG_BOOT_CONFIG */
@@ -923,8 +915,10 @@ static void __init print_unknown_bootoptions(void)
 	for (p = &envp_init[2]; *p; p++)
 		end += sprintf(end, " %s", *p);
 
-	pr_notice("Unknown command line parameters:%s\n", unknown_options);
-	memblock_free_ptr(unknown_options, len);
+	/* Start at unknown_options[1] to skip the initial space */
+	pr_notice("Unknown kernel command line parameters \"%s\", will be passed to user space.\n",
+		&unknown_options[1]);
+	memblock_free(unknown_options, len);
 }
 
 asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
@@ -1242,7 +1236,7 @@ trace_initcall_start_cb(void *data, initcall_t fn)
 {
 	ktime_t *calltime = (ktime_t *)data;
 
-	printk(KERN_DEBUG "calling  %pS @ %i irqs_disabled() %d\n", fn, task_pid_nr(current), irqs_disabled());
+	printk(KERN_DEBUG "calling  %pS @ %i\n", fn, task_pid_nr(current));
 	*calltime = ktime_get();
 }
 
@@ -1256,8 +1250,8 @@ trace_initcall_finish_cb(void *data, initcall_t fn, int ret)
 	rettime = ktime_get();
 	delta = ktime_sub(rettime, *calltime);
 	duration = (unsigned long long) ktime_to_ns(delta) >> 10;
-	printk(KERN_DEBUG "initcall %pS returned %d after %lld usecs, irqs_disabled() %d\n",
-		 fn, ret, duration, irqs_disabled());
+	printk(KERN_DEBUG "initcall %pS returned %d after %lld usecs\n",
+		 fn, ret, duration);
 }
 
 static ktime_t initcall_calltime;
@@ -1505,6 +1499,8 @@ static int __ref kernel_init(void *unused)
 	kernel_init_freeable();
 	/* need to finish all async __init code before freeing the memory */
 	async_synchronize_full();
+
+	system_state = SYSTEM_FREEING_INITMEM;
 	kprobe_free_init_mem();
 	ftrace_free_init_mem();
 	kgdb_free_init_mem();