diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/Makefile | 4 | ||||
| -rw-r--r-- | kernel/cgroup/cgroup.c | 33 | ||||
| -rw-r--r-- | kernel/cpu.c | 4 | ||||
| -rwxr-xr-x | kernel/gen_kheaders.sh (renamed from kernel/gen_ikh_data.sh) | 17 | ||||
| -rw-r--r-- | kernel/kheaders.c | 40 | ||||
| -rw-r--r-- | kernel/power/hibernate.c | 9 | ||||
| -rw-r--r-- | kernel/power/suspend.c | 6 | ||||
| -rw-r--r-- | kernel/signal.c | 11 |
8 files changed, 81 insertions, 43 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 33824f0385b3..a8d923b5481b 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -71,7 +71,7 @@ obj-$(CONFIG_UTS_NS) += utsname.o obj-$(CONFIG_USER_NS) += user_namespace.o obj-$(CONFIG_PID_NS) += pid_namespace.o obj-$(CONFIG_IKCONFIG) += configs.o -obj-$(CONFIG_IKHEADERS_PROC) += kheaders.o +obj-$(CONFIG_IKHEADERS) += kheaders.o obj-$(CONFIG_SMP) += stop_machine.o obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o obj-$(CONFIG_AUDIT) += audit.o auditfilter.o @@ -127,7 +127,7 @@ $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE $(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz quiet_cmd_genikh = CHK $(obj)/kheaders_data.tar.xz -cmd_genikh = $(CONFIG_SHELL) $(srctree)/kernel/gen_ikh_data.sh $@ +cmd_genikh = $(CONFIG_SHELL) $(srctree)/kernel/gen_kheaders.sh $@ $(obj)/kheaders_data.tar.xz: FORCE $(call cmd,genikh) diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 426a0026225c..155048b0eca2 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -1460,8 +1460,8 @@ struct cgroup *task_cgroup_from_root(struct task_struct *task, static struct kernfs_syscall_ops cgroup_kf_syscall_ops; -static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft, - char *buf) +static char *cgroup_fill_name(struct cgroup *cgrp, const struct cftype *cft, + char *buf, bool write_link_name) { struct cgroup_subsys *ss = cft->ss; @@ -1471,13 +1471,26 @@ static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft, snprintf(buf, CGROUP_FILE_NAME_MAX, "%s%s.%s", dbg, cgroup_on_dfl(cgrp) ? ss->name : ss->legacy_name, - cft->name); + write_link_name ? cft->link_name : cft->name); } else { - strscpy(buf, cft->name, CGROUP_FILE_NAME_MAX); + strscpy(buf, write_link_name ? cft->link_name : cft->name, + CGROUP_FILE_NAME_MAX); } return buf; } +static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft, + char *buf) +{ + return cgroup_fill_name(cgrp, cft, buf, false); +} + +static char *cgroup_link_name(struct cgroup *cgrp, const struct cftype *cft, + char *buf) +{ + return cgroup_fill_name(cgrp, cft, buf, true); +} + /** * cgroup_file_mode - deduce file mode of a control file * @cft: the control file in question @@ -1636,6 +1649,9 @@ static void cgroup_rm_file(struct cgroup *cgrp, const struct cftype *cft) } kernfs_remove_by_name(cgrp->kn, cgroup_file_name(cgrp, cft, name)); + if (cft->flags & CFTYPE_SYMLINKED) + kernfs_remove_by_name(cgrp->kn, + cgroup_link_name(cgrp, cft, name)); } /** @@ -3821,6 +3837,7 @@ static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp, { char name[CGROUP_FILE_NAME_MAX]; struct kernfs_node *kn; + struct kernfs_node *kn_link; struct lock_class_key *key = NULL; int ret; @@ -3851,6 +3868,14 @@ static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp, spin_unlock_irq(&cgroup_file_kn_lock); } + if (cft->flags & CFTYPE_SYMLINKED) { + kn_link = kernfs_create_link(cgrp->kn, + cgroup_link_name(cgrp, cft, name), + kn); + if (IS_ERR(kn_link)) + return PTR_ERR(kn_link); + } + return 0; } diff --git a/kernel/cpu.c b/kernel/cpu.c index f2ef10460698..077fde6fb953 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -2061,7 +2061,7 @@ static void cpuhp_online_cpu_device(unsigned int cpu) kobject_uevent(&dev->kobj, KOBJ_ONLINE); } -static int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) +int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { int cpu, ret = 0; @@ -2093,7 +2093,7 @@ static int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) return ret; } -static int cpuhp_smt_enable(void) +int cpuhp_smt_enable(void) { int cpu, ret = 0; diff --git a/kernel/gen_ikh_data.sh b/kernel/gen_kheaders.sh index 591a94f7b387..9a34e1d9bd7f 100755 --- a/kernel/gen_ikh_data.sh +++ b/kernel/gen_kheaders.sh @@ -2,7 +2,7 @@ # SPDX-License-Identifier: GPL-2.0 # This script generates an archive consisting of kernel headers -# for CONFIG_IKHEADERS_PROC. +# for CONFIG_IKHEADERS. set -e spath="$(dirname "$(readlink -f "$0")")" kroot="$spath/.." @@ -31,9 +31,8 @@ arch/$SRCARCH/include/ # This block is useful for debugging the incremental builds. # Uncomment it for debugging. -# iter=1 -# if [ ! -f /tmp/iter ]; then echo 1 > /tmp/iter; -# else; iter=$(($(cat /tmp/iter) + 1)); fi +# if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter; +# else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi # find $src_file_list -type f | xargs ls -lR > /tmp/src-ls-$iter # find $obj_file_list -type f | xargs ls -lR > /tmp/obj-ls-$iter @@ -43,10 +42,18 @@ arch/$SRCARCH/include/ pushd $kroot > /dev/null src_files_md5="$(find $src_file_list -type f | grep -v "include/generated/compile.h" | + grep -v "include/generated/autoconf.h" | + grep -v "include/config/auto.conf" | + grep -v "include/config/auto.conf.cmd" | + grep -v "include/config/tristate.conf" | xargs ls -lR | md5sum | cut -d ' ' -f1)" popd > /dev/null obj_files_md5="$(find $obj_file_list -type f | grep -v "include/generated/compile.h" | + grep -v "include/generated/autoconf.h" | + grep -v "include/config/auto.conf" | + grep -v "include/config/auto.conf.cmd" | + grep -v "include/config/tristate.conf" | xargs ls -lR | md5sum | cut -d ' ' -f1)" if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi @@ -82,7 +89,7 @@ find $cpio_dir -type f -print0 | tar -Jcf $tarfile -C $cpio_dir/ . > /dev/null -echo "$src_files_md5" > kernel/kheaders.md5 +echo "$src_files_md5" > kernel/kheaders.md5 echo "$obj_files_md5" >> kernel/kheaders.md5 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5 diff --git a/kernel/kheaders.c b/kernel/kheaders.c index 70ae6052920d..8f69772af77b 100644 --- a/kernel/kheaders.c +++ b/kernel/kheaders.c @@ -8,9 +8,8 @@ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/proc_fs.h> +#include <linux/kobject.h> #include <linux/init.h> -#include <linux/uaccess.h> /* * Define kernel_headers_data and kernel_headers_data_end, within which the @@ -31,39 +30,32 @@ extern char kernel_headers_data; extern char kernel_headers_data_end; static ssize_t -ikheaders_read_current(struct file *file, char __user *buf, - size_t len, loff_t *offset) +ikheaders_read(struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t len) { - return simple_read_from_buffer(buf, len, offset, - &kernel_headers_data, - &kernel_headers_data_end - - &kernel_headers_data); + memcpy(buf, &kernel_headers_data + off, len); + return len; } -static const struct file_operations ikheaders_file_ops = { - .read = ikheaders_read_current, - .llseek = default_llseek, +static struct bin_attribute kheaders_attr __ro_after_init = { + .attr = { + .name = "kheaders.tar.xz", + .mode = 0444, + }, + .read = &ikheaders_read, }; static int __init ikheaders_init(void) { - struct proc_dir_entry *entry; - - /* create the current headers file */ - entry = proc_create("kheaders.tar.xz", S_IRUGO, NULL, - &ikheaders_file_ops); - if (!entry) - return -ENOMEM; - - proc_set_size(entry, - &kernel_headers_data_end - - &kernel_headers_data); - return 0; + kheaders_attr.size = (&kernel_headers_data_end - + &kernel_headers_data); + return sysfs_create_bin_file(kernel_kobj, &kheaders_attr); } static void __exit ikheaders_cleanup(void) { - remove_proc_entry("kheaders.tar.xz", NULL); + sysfs_remove_bin_file(kernel_kobj, &kheaders_attr); } module_init(ikheaders_init); diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 8fc054e5c501..cd7434e6000d 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -256,6 +256,11 @@ void swsusp_show_speed(ktime_t start, ktime_t stop, (kps % 1000) / 10); } +__weak int arch_resume_nosmt(void) +{ + return 0; +} + /** * create_image - Create a hibernation image. * @platform_mode: Whether or not to use the platform driver. @@ -323,6 +328,10 @@ static int create_image(int platform_mode) Enable_cpus: suspend_enable_secondary_cpus(); + /* Allow architectures to do nosmt-specific post-resume dances */ + if (!in_suspend) + error = arch_resume_nosmt(); + Platform_finish: platform_finish(platform_mode); diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 3c57e206f3e8..9505101ed2bc 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -61,6 +61,12 @@ static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head); enum s2idle_states __read_mostly s2idle_state; static DEFINE_RAW_SPINLOCK(s2idle_lock); +/** + * pm_suspend_via_s2idle - Check if suspend-to-idle is the default suspend. + * + * Return 'true' if suspend-to-idle has been selected as the default system + * suspend method. + */ bool pm_suspend_via_s2idle(void) { return mem_sleep_current == PM_SUSPEND_TO_IDLE; diff --git a/kernel/signal.c b/kernel/signal.c index 328a01e1a2f0..d622eac9d169 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3621,12 +3621,11 @@ static struct pid *pidfd_to_pid(const struct file *file) } /** - * sys_pidfd_send_signal - send a signal to a process through a task file - * descriptor - * @pidfd: the file descriptor of the process - * @sig: signal to be sent - * @info: the signal info - * @flags: future flags to be passed + * sys_pidfd_send_signal - Signal a process through a pidfd + * @pidfd: file descriptor of the process + * @sig: signal to send + * @info: signal info + * @flags: future flags * * The syscall currently only signals via PIDTYPE_PID which covers * kill(<positive-pid>, <signal>. It does not signal threads or process |