Merge branch 'elan-i2c' into next

Bring in update to Elan touchpad driver to support newer touchpads with
higher resolution.

6 files changed, 118 insertions, 58 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 4f717bfdbfe2..74a5ac65644f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -6,8 +6,7 @@ config DEFCONFIG_LIST
 	default "/lib/modules/$(shell,uname -r)/.config"
 	default "/etc/kernel-config"
 	default "/boot/config-$(shell,uname -r)"
-	default ARCH_DEFCONFIG
-	default "arch/$(ARCH)/defconfig"
+	default "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)"
 
 config CC_IS_GCC
 	def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
@@ -17,6 +16,10 @@ config GCC_VERSION
 	default $(shell,$(srctree)/scripts/gcc-version.sh $(CC)) if CC_IS_GCC
 	default 0
 
+config LD_VERSION
+	int
+	default $(shell,$(LD) --version | $(srctree)/scripts/ld-version.sh)
+
 config CC_IS_CLANG
 	def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
 
@@ -36,22 +39,6 @@ config TOOLS_SUPPORT_RELR
 config CC_HAS_ASM_INLINE
 	def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
 
-config CC_HAS_WARN_MAYBE_UNINITIALIZED
-	def_bool $(cc-option,-Wmaybe-uninitialized)
-	help
-	  GCC >= 4.7 supports this option.
-
-config CC_DISABLE_WARN_MAYBE_UNINITIALIZED
-	bool
-	depends on CC_HAS_WARN_MAYBE_UNINITIALIZED
-	default CC_IS_GCC && GCC_VERSION < 40900  # unreliable for GCC < 4.9
-	help
-	  GCC's -Wmaybe-uninitialized is not reliable by definition.
-	  Lots of false positive warnings are produced in some cases.
-
-	  If this option is enabled, -Wno-maybe-uninitialzed is passed
-	  to the compiler to suppress maybe-uninitialized warnings.
-
 config CONSTRUCTORS
 	bool
 	depends on !UML
@@ -451,6 +438,10 @@ config HAVE_SCHED_AVG_IRQ
 	depends on IRQ_TIME_ACCOUNTING || PARAVIRT_TIME_ACCOUNTING
 	depends on SMP
 
+config SCHED_THERMAL_PRESSURE
+	bool "Enable periodic averaging of thermal pressure"
+	depends on SMP
+
 config BSD_PROCESS_ACCT
 	bool "BSD Process Accounting"
 	depends on MULTIUSER
@@ -869,7 +860,7 @@ config BLK_CGROUP
 	This option only enables generic Block IO controller infrastructure.
 	One needs to also enable actual IO controlling logic/policy. For
 	enabling proportional weight division of disk bandwidth in CFQ, set
-	CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
+	CONFIG_BFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
 	CONFIG_BLK_DEV_THROTTLING=y.
 
 	See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information.
@@ -1026,7 +1017,8 @@ config CGROUP_PERF
 	help
 	  This option extends the perf per-cpu mode to restrict monitoring
 	  to threads which belong to the cgroup specified and run on the
-	  designated cpu.
+	  designated cpu.  Or this can be used to have cgroup ID in samples
+	  so that it can monitor performance events among cgroups.
 
 	  Say N if unsure.
 
@@ -1249,14 +1241,12 @@ config CC_OPTIMIZE_FOR_PERFORMANCE
 config CC_OPTIMIZE_FOR_PERFORMANCE_O3
 	bool "Optimize more for performance (-O3)"
 	depends on ARC
-	imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED  # avoid false positives
 	help
 	  Choosing this option will pass "-O3" to your compiler to optimize
 	  the kernel yet more for performance.
 
 config CC_OPTIMIZE_FOR_SIZE
 	bool "Optimize for size (-Os)"
-	imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED  # avoid false positives
 	help
 	  Choosing this option will pass "-Os" to your compiler resulting
 	  in a smaller kernel.
@@ -1534,7 +1524,6 @@ config AIO
 
 config IO_URING
 	bool "Enable IO uring support" if EXPERT
-	select ANON_INODES
 	select IO_WQ
 	default y
 	help
@@ -1552,6 +1541,11 @@ config ADVISE_SYSCALLS
 	  applications use these syscalls, you can disable this option to save
 	  space.
 
+config HAVE_ARCH_USERFAULTFD_WP
+	bool
+	help
+	  Arch has userfaultfd write protection support
+
 config MEMBARRIER
 	bool "Enable membarrier() system call" if EXPERT
 	default y
@@ -1615,6 +1609,19 @@ config KALLSYMS_BASE_RELATIVE
 # end of the "standard kernel features (expert users)" menu
 
 # syscall, maps, verifier
+
+config BPF_LSM
+	bool "LSM Instrumentation with BPF"
+	depends on BPF_EVENTS
+	depends on BPF_SYSCALL
+	depends on SECURITY
+	depends on BPF_JIT
+	help
+	  Enables instrumentation of the security hooks with eBPF programs for
+	  implementing dynamic MAC and Audit Policies.
+
+	  If you are unsure how to answer this question, answer N.
+
 config BPF_SYSCALL
 	bool "Enable bpf() system call"
 	select BPF
@@ -2207,6 +2214,19 @@ config TRIM_UNUSED_KSYMS
 
 	  If unsure, or if you need to build out-of-tree modules, say N.
 
+config UNUSED_KSYMS_WHITELIST
+	string "Whitelist of symbols to keep in ksymtab"
+	depends on TRIM_UNUSED_KSYMS
+	help
+	  By default, all unused exported symbols will be un-exported from the
+	  build when TRIM_UNUSED_KSYMS is selected.
+
+	  UNUSED_KSYMS_WHITELIST allows to whitelist symbols that must be kept
+	  exported at all times, even in absence of in-tree users. The value to
+	  set here is the path to a text file containing the list of symbols,
+	  one per line. The path can be absolute, or relative to the kernel
+	  source tree.
+
 endif # MODULES
 
 config MODULES_TREE_LOOKUP
@@ -2241,6 +2261,9 @@ config ASN1
 
 source "kernel/Kconfig.locks"
 
+config ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
+	bool
+
 config ARCH_HAS_SYNC_CORE_BEFORE_USERMODE
 	bool
 
diff --git a/init/Makefile b/init/Makefile
index 6246a06364d0..d45e967483b2 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -35,4 +35,4 @@ include/generated/compile.h: FORCE
 	@$($(quiet)chk_compile.h)
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@	\
 	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)"	\
-	"$(CONFIG_PREEMPT_RT)" "$(CC) $(KBUILD_CFLAGS)"
+	"$(CONFIG_PREEMPT_RT)" "$(CC)" "$(LD)"
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 0ae9cc22f2ae..29d326b6c29d 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -429,12 +429,10 @@ void __init mount_block_root(char *name, int flags)
 	struct page *page = alloc_page(GFP_KERNEL);
 	char *fs_names = page_address(page);
 	char *p;
-#ifdef CONFIG_BLOCK
 	char b[BDEVNAME_SIZE];
-#else
-	const char *b = name;
-#endif
 
+	scnprintf(b, BDEVNAME_SIZE, "unknown-block(%u,%u)",
+		  MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
 	get_fs_names(fs_names);
 retry:
 	for (p = fs_names; *p; p += strlen(p)+1) {
@@ -451,9 +449,6 @@ retry:
 		 * and bad superblock on root device.
 		 * and give them a list of the available devices
 		 */
-#ifdef CONFIG_BLOCK
-		__bdevname(ROOT_DEV, b);
-#endif
 		printk("VFS: Cannot open root device \"%s\" or %s: error %d\n",
 				root_device_name, b, err);
 		printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
@@ -476,9 +471,6 @@ retry:
 	for (p = fs_names; *p; p += strlen(p)+1)
 		printk(" %s", p);
 	printk("\n");
-#ifdef CONFIG_BLOCK
-	__bdevname(ROOT_DEV, b);
-#endif
 	panic("VFS: Unable to mount root fs on %s", b);
 out:
 	put_page(page);
diff --git a/init/init_task.c b/init/init_task.c
index 9e5cbe5eab7b..bd403ed3e418 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -26,6 +26,7 @@ static struct signal_struct init_signals = {
 	.multiprocess	= HLIST_HEAD_INIT,
 	.rlim		= INIT_RLIMITS,
 	.cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex),
+	.exec_update_mutex = __MUTEX_INITIALIZER(init_signals.exec_update_mutex),
 #ifdef CONFIG_POSIX_TIMERS
 	.posix_timers = LIST_HEAD_INIT(init_signals.posix_timers),
 	.cputimer	= {
diff --git a/init/initramfs.c b/init/initramfs.c
index 8ec1be4d7d51..7a38012e1af7 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -542,7 +542,7 @@ void __weak free_initrd_mem(unsigned long start, unsigned long end)
 }
 
 #ifdef CONFIG_KEXEC_CORE
-static bool kexec_free_initrd(void)
+static bool __init kexec_free_initrd(void)
 {
 	unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
 	unsigned long crashk_end   = (unsigned long)__va(crashk_res.end);
diff --git a/init/main.c b/init/main.c
index ee4947af823f..03371976d387 100644
--- a/init/main.c
+++ b/init/main.c
@@ -257,6 +257,47 @@ static int __init loglevel(char *str)
 
 early_param("loglevel", loglevel);
 
+#ifdef CONFIG_BLK_DEV_INITRD
+static void * __init get_boot_config_from_initrd(u32 *_size, u32 *_csum)
+{
+	u32 size, csum;
+	char *data;
+	u32 *hdr;
+
+	if (!initrd_end)
+		return NULL;
+
+	data = (char *)initrd_end - BOOTCONFIG_MAGIC_LEN;
+	if (memcmp(data, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN))
+		return NULL;
+
+	hdr = (u32 *)(data - 8);
+	size = hdr[0];
+	csum = hdr[1];
+
+	data = ((void *)hdr) - size;
+	if ((unsigned long)data < initrd_start) {
+		pr_err("bootconfig size %d is greater than initrd size %ld\n",
+			size, initrd_end - initrd_start);
+		return NULL;
+	}
+
+	/* Remove bootconfig from initramfs/initrd */
+	initrd_end = (unsigned long)data;
+	if (_size)
+		*_size = size;
+	if (_csum)
+		*_csum = csum;
+
+	return data;
+}
+#else
+static void * __init get_boot_config_from_initrd(u32 *_size, u32 *_csum)
+{
+	return NULL;
+}
+#endif
+
 #ifdef CONFIG_BOOT_CONFIG
 
 char xbc_namebuf[XBC_KEYLEN_MAX] __initdata;
@@ -353,11 +394,15 @@ static int __init bootconfig_params(char *param, char *val,
 static void __init setup_boot_config(const char *cmdline)
 {
 	static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata;
+	const char *msg;
+	int pos;
 	u32 size, csum;
 	char *data, *copy;
-	u32 *hdr;
 	int ret;
 
+	/* Cut out the bootconfig data even if we have no bootconfig option */
+	data = get_boot_config_from_initrd(&size, &csum);
+
 	strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
 	parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL,
 		   bootconfig_params);
@@ -365,16 +410,10 @@ static void __init setup_boot_config(const char *cmdline)
 	if (!bootconfig_found)
 		return;
 
-	if (!initrd_end)
-		goto not_found;
-
-	data = (char *)initrd_end - BOOTCONFIG_MAGIC_LEN;
-	if (memcmp(data, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN))
-		goto not_found;
-
-	hdr = (u32 *)(data - 8);
-	size = hdr[0];
-	csum = hdr[1];
+	if (!data) {
+		pr_err("'bootconfig' found on command line, but no bootconfig found\n");
+		return;
+	}
 
 	if (size >= XBC_DATA_MAX) {
 		pr_err("bootconfig size %d greater than max size %d\n",
@@ -382,10 +421,6 @@ static void __init setup_boot_config(const char *cmdline)
 		return;
 	}
 
-	data = ((void *)hdr) - size;
-	if ((unsigned long)data < initrd_start)
-		goto not_found;
-
 	if (boot_config_checksum((unsigned char *)data, size) != csum) {
 		pr_err("bootconfig checksum failed\n");
 		return;
@@ -400,10 +435,14 @@ static void __init setup_boot_config(const char *cmdline)
 	memcpy(copy, data, size);
 	copy[size] = '\0';
 
-	ret = xbc_init(copy);
-	if (ret < 0)
-		pr_err("Failed to parse bootconfig\n");
-	else {
+	ret = xbc_init(copy, &msg, &pos);
+	if (ret < 0) {
+		if (pos < 0)
+			pr_err("Failed to init bootconfig: %s.\n", msg);
+		else
+			pr_err("Failed to parse bootconfig: %s at %d.\n",
+				msg, pos);
+	} else {
 		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");
@@ -411,11 +450,15 @@ static void __init setup_boot_config(const char *cmdline)
 		extra_init_args = xbc_make_cmdline("init");
 	}
 	return;
-not_found:
-	pr_err("'bootconfig' found on command line, but no bootconfig found\n");
 }
+
 #else
-#define setup_boot_config(cmdline)	do { } while (0)
+
+static void __init setup_boot_config(const char *cmdline)
+{
+	/* Remove bootconfig data from initrd */
+	get_boot_config_from_initrd(NULL, NULL);
+}
 
 static int __init warn_bootconfig(char *str)
 {
@@ -907,7 +950,6 @@ asmlinkage __visible void __init start_kernel(void)
 	boot_init_stack_canary();
 
 	time_init();
-	printk_safe_init();
 	perf_event_init();
 	profile_init();
 	call_function_init();
@@ -996,6 +1038,8 @@ asmlinkage __visible void __init start_kernel(void)
 
 	/* Do the rest non-__init'ed, we're now alive */
 	arch_call_rest_init();
+
+	prevent_tail_call_optimization();
 }
 
 /* Call all constructor functions linked into the kernel. */