proc: switch /proc/cmdline to seq_file
and move it to fs/proc/cmdline.c while I'm at it.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 97985c8..48f9f0f 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -9,6 +9,7 @@
proc-y += inode.o root.o base.o generic.o array.o \
proc_tty.o proc_misc.o
+proc-y += cmdline.o
proc-y += loadavg.o
proc-y += meminfo.o
proc-y += uptime.o
diff --git a/fs/proc/cmdline.c b/fs/proc/cmdline.c
new file mode 100644
index 0000000..82676e3
--- /dev/null
+++ b/fs/proc/cmdline.c
@@ -0,0 +1,29 @@
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static int cmdline_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%s\n", saved_command_line);
+ return 0;
+}
+
+static int cmdline_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cmdline_proc_show, NULL);
+}
+
+static const struct file_operations cmdline_proc_fops = {
+ .open = cmdline_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init proc_cmdline_init(void)
+{
+ proc_create("cmdline", 0, NULL, &cmdline_proc_fops);
+ return 0;
+}
+module_init(proc_cmdline_init);
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 9fa20f15..15257d4 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -472,15 +472,6 @@
.release = seq_release,
};
-static int cmdline_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- int len;
-
- len = sprintf(page, "%s\n", saved_command_line);
- return proc_calc_metrics(page, start, off, count, eof, len);
-}
-
#ifdef CONFIG_FILE_LOCKING
static int locks_open(struct inode *inode, struct file *filp)
{
@@ -641,7 +632,6 @@
char *name;
int (*read_proc)(char*,char**,off_t,int,int*,void*);
} *p, simple_ones[] = {
- {"cmdline", cmdline_read_proc},
{"execdomains", execdomains_read_proc},
{NULL,}
};