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-rw-r--r--init/Kconfig12
-rw-r--r--init/do_mounts.c3
-rw-r--r--init/do_mounts.h9
-rw-r--r--init/init_task.c1
-rw-r--r--init/initramfs.c12
-rw-r--r--init/main.c40
6 files changed, 41 insertions, 36 deletions
diff --git a/init/Kconfig b/init/Kconfig
index c8a155cf72..664bedb9a7 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -115,7 +115,7 @@ config CONSTRUCTORS
bool
config IRQ_WORK
- bool
+ def_bool y if SMP
config BUILDTIME_TABLE_SORT
bool
@@ -1466,11 +1466,6 @@ config SYSCTL_ARCH_UNALIGN_ALLOW
config HAVE_PCSPKR_PLATFORM
bool
-# interpreter that classic socket filters depend on
-config BPF
- bool
- select CRYPTO_LIB_SHA1
-
menuconfig EXPERT
bool "Configure standard kernel features (expert users)"
# Unhide debug options, to make the on-by-default options visible
@@ -1504,7 +1499,7 @@ config MULTIUSER
config SGETMASK_SYSCALL
bool "sgetmask/ssetmask syscalls support" if EXPERT
- def_bool PARISC || M68K || PPC || MIPS || X86 || SPARC || MICROBLAZE || SUPERH
+ default PARISC || M68K || PPC || MIPS || X86 || SPARC || MICROBLAZE || SUPERH
help
sys_sgetmask and sys_ssetmask are obsolete system calls
no longer supported in libc but still enabled by default in some
@@ -1991,6 +1986,9 @@ source "kernel/Kconfig.locks"
config ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
bool
+config ARCH_HAS_PREPARE_SYNC_CORE_CMD
+ bool
+
config ARCH_HAS_SYNC_CORE_BEFORE_USERMODE
bool
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 279ad28bf4..3c5fd993bc 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -208,6 +208,9 @@ retry:
goto out;
case -EACCES:
case -EINVAL:
+#ifdef CONFIG_BLOCK
+ init_flush_fput();
+#endif
continue;
}
/*
diff --git a/init/do_mounts.h b/init/do_mounts.h
index 15e372b00c..6069ea3eb8 100644
--- a/init/do_mounts.h
+++ b/init/do_mounts.h
@@ -9,6 +9,8 @@
#include <linux/major.h>
#include <linux/root_dev.h>
#include <linux/init_syscalls.h>
+#include <linux/task_work.h>
+#include <linux/file.h>
void mount_root_generic(char *name, char *pretty_name, int flags);
void mount_root(char *root_device_name);
@@ -41,3 +43,10 @@ static inline bool initrd_load(char *root_device_name)
}
#endif
+
+/* Ensure that async file closing finished to prevent spurious errors. */
+static inline void init_flush_fput(void)
+{
+ flush_delayed_fput();
+ task_work_run();
+}
diff --git a/init/init_task.c b/init/init_task.c
index 7ecb458eb3..4daee6d761 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -147,6 +147,7 @@ struct task_struct init_task __aligned(L1_CACHE_BYTES) = {
.rcu_tasks_holdout = false,
.rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list),
.rcu_tasks_idle_cpu = -1,
+ .rcu_tasks_exit_list = LIST_HEAD_INIT(init_task.rcu_tasks_exit_list),
#endif
#ifdef CONFIG_TASKS_TRACE_RCU
.trc_reader_nesting = 0,
diff --git a/init/initramfs.c b/init/initramfs.c
index b607d3463b..a298a3854a 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -16,9 +16,10 @@
#include <linux/mm.h>
#include <linux/namei.h>
#include <linux/init_syscalls.h>
-#include <linux/task_work.h>
#include <linux/umh.h>
+#include "do_mounts.h"
+
static __initdata bool csum_present;
static __initdata u32 io_csum;
@@ -366,7 +367,7 @@ static int __init do_name(void)
if (S_ISREG(mode)) {
int ml = maybe_link();
if (ml >= 0) {
- int openflags = O_WRONLY|O_CREAT;
+ int openflags = O_WRONLY|O_CREAT|O_LARGEFILE;
if (ml != 1)
openflags |= O_TRUNC;
wfile = filp_open(collected, openflags, mode);
@@ -642,7 +643,7 @@ void __weak __init free_initrd_mem(unsigned long start, unsigned long end)
"initrd");
}
-#ifdef CONFIG_KEXEC_CORE
+#ifdef CONFIG_CRASH_RESERVE
static bool __init kexec_free_initrd(void)
{
unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
@@ -679,8 +680,6 @@ static void __init populate_initrd_image(char *err)
struct file *file;
loff_t pos = 0;
- unpack_to_rootfs(__initramfs_start, __initramfs_size);
-
printk(KERN_INFO "rootfs image is not initramfs (%s); looks like an initrd\n",
err);
file = filp_open("/initrd.image", O_WRONLY|O_CREAT|O_LARGEFILE, 0700);
@@ -736,8 +735,7 @@ done:
initrd_start = 0;
initrd_end = 0;
- flush_delayed_fput();
- task_work_run();
+ init_flush_fput();
}
static ASYNC_DOMAIN_EXCLUSIVE(initramfs_domain);
diff --git a/init/main.c b/init/main.c
index b06bb72a28..5dcf5274c0 100644
--- a/init/main.c
+++ b/init/main.c
@@ -100,6 +100,8 @@
#include <linux/init_syscalls.h>
#include <linux/stackdepot.h>
#include <linux/randomize_kstack.h>
+#include <linux/pidfs.h>
+#include <linux/ptdump.h>
#include <net/net_namespace.h>
#include <asm/io.h>
@@ -609,7 +611,6 @@ static int __init rdinit_setup(char *str)
__setup("rdinit=", rdinit_setup);
#ifndef CONFIG_SMP
-static const unsigned int setup_max_cpus = NR_CPUS;
static inline void setup_nr_cpu_ids(void) { }
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#endif
@@ -689,7 +690,7 @@ static void __init setup_command_line(char *command_line)
static __initdata DECLARE_COMPLETION(kthreadd_done);
-noinline void __ref __noreturn rest_init(void)
+static noinline void __ref __noreturn rest_init(void)
{
struct task_struct *tsk;
int pid;
@@ -784,6 +785,10 @@ void __init __weak smp_setup_processor_id(void)
{
}
+void __init __weak smp_prepare_boot_cpu(void)
+{
+}
+
# if THREAD_SIZE >= PAGE_SIZE
void __init __weak thread_stack_cache_init(void)
{
@@ -830,11 +835,6 @@ static int __init early_randomize_kstack_offset(char *buf)
early_param("randomize_kstack_offset", early_randomize_kstack_offset);
#endif
-void __init __weak __noreturn arch_call_rest_init(void)
-{
- rest_init();
-}
-
static void __init print_unknown_bootoptions(void)
{
char *unknown_options;
@@ -1067,6 +1067,7 @@ void start_kernel(void)
seq_file_init();
proc_root_init();
nsfs_init();
+ pidfs_init();
cpuset_init();
cgroup_init();
taskstats_init_early();
@@ -1077,7 +1078,7 @@ void start_kernel(void)
kcsan_init();
/* Do the rest non-__init'ed, we're now alive */
- arch_call_rest_init();
+ rest_init();
/*
* Avoid stack canaries in callers of boot_init_stack_canary for gcc-10
@@ -1404,10 +1405,9 @@ static int __init set_debug_rodata(char *str)
early_param("rodata", set_debug_rodata);
#endif
-#ifdef CONFIG_STRICT_KERNEL_RWX
static void mark_readonly(void)
{
- if (rodata_enabled) {
+ if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX) && rodata_enabled) {
/*
* load_module() results in W+X mappings, which are cleaned
* up with init_free_wq. Let's make sure that queued work is
@@ -1416,21 +1416,16 @@ static void mark_readonly(void)
*/
flush_module_init_free_work();
mark_rodata_ro();
+ debug_checkwx();
rodata_test();
- } else
+ } else if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)) {
pr_info("Kernel memory protection disabled.\n");
+ } else if (IS_ENABLED(CONFIG_ARCH_HAS_STRICT_KERNEL_RWX)) {
+ pr_warn("Kernel memory protection not selected by kernel config.\n");
+ } else {
+ pr_warn("This architecture does not have kernel memory protection.\n");
+ }
}
-#elif defined(CONFIG_ARCH_HAS_STRICT_KERNEL_RWX)
-static inline void mark_readonly(void)
-{
- pr_warn("Kernel memory protection not selected by kernel config.\n");
-}
-#else
-static inline void mark_readonly(void)
-{
- pr_warn("This architecture does not have kernel memory protection.\n");
-}
-#endif
void __weak free_initmem(void)
{
@@ -1553,6 +1548,7 @@ static noinline void __init kernel_init_freeable(void)
sched_init_smp();
workqueue_init_topology();
+ async_init();
padata_init();
page_alloc_init_late();