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proc: introduce proc_create_single{,_data}

Browse source 
Variants of proc_create{,_data} that directly take a seq_file show
callback and drastically reduces the boilerplate code in the callers.

All trivial callers converted over.

Signed-off-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Christoph Hellwig 2018-05-15 15:57:23 +02:00
commit 3f3942aca6
85 changed files with 235 additions and 1509 deletions
Download patch file Download diff file Expand all files Collapse all files

2
kernel/cgroup/cgroup-internal.h
View file

@ -218,9 +218,9 @@ extern const struct proc_ns_operations cgroupns_operations;
* cgroup-v1.c
*/
extern struct cftype cgroup1_base_files[];
extern const struct file_operations proc_cgroupstats_operations;
extern struct kernfs_syscall_ops cgroup1_kf_syscall_ops;
int proc_cgroupstats_show(struct seq_file *m, void *v);
bool cgroup1_ssid_disabled(int ssid);
void cgroup1_pidlist_destroy_all(struct cgroup *cgrp);
void cgroup1_release_agent(struct work_struct *work);

14
kernel/cgroup/cgroup-v1.c
View file

@ -682,7 +682,7 @@ struct cftype cgroup1_base_files[] = {
};
/* Display information about each subsystem and each hierarchy */
static int proc_cgroupstats_show(struct seq_file *m, void *v)
int proc_cgroupstats_show(struct seq_file *m, void *v)
{
struct cgroup_subsys *ss;
int i;
@ -705,18 +705,6 @@ static int proc_cgroupstats_show(struct seq_file *m, void *v)
return 0;
}
static int cgroupstats_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_cgroupstats_show, NULL);
}
const struct file_operations proc_cgroupstats_operations = {
.open = cgroupstats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/**
* cgroupstats_build - build and fill cgroupstats
* @stats: cgroupstats to fill information into

2
kernel/cgroup/cgroup.c
View file

@ -5335,7 +5335,7 @@ int __init cgroup_init(void)
WARN_ON(sysfs_create_mount_point(fs_kobj, "cgroup"));
WARN_ON(register_filesystem(&cgroup_fs_type));
WARN_ON(register_filesystem(&cgroup2_fs_type));
WARN_ON(!proc_create("cgroups", 0, NULL, &proc_cgroupstats_operations));
WARN_ON(!proc_create_single("cgroups", 0, NULL, proc_cgroupstats_show));
return 0;
}