proc: switch /proc/version to seq_file

and move it to fs/proc/version.c while I'm at it.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

3 files changed, 35 insertions, 13 deletions

diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 70607a03839d..97985c848ac3 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -12,6 +12,7 @@ proc-y       += inode.o root.o base.o generic.o array.o \
 proc-y  += loadavg.o
 proc-y  += meminfo.o
 proc-y  += uptime.o
+proc-y  += version.o
 proc-$(CONFIG_PROC_SYSCTL)      += proc_sysctl.o
 proc-$(CONFIG_NET)              += proc_net.o
 proc-$(CONFIG_PROC_KCORE)       += kcore.o
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 1aba51b0a0c4..4814b111d836 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -115,18 +115,6 @@ static const struct file_operations proc_zoneinfo_file_operations = {
         .release        = seq_release,
 };
 
-static int version_read_proc(char *page, char **start, off_t off,
-                                 int count, int *eof, void *data)
-{
-        int len;
-
-        len = snprintf(page, PAGE_SIZE, linux_proc_banner,
-                utsname()->sysname,
-                utsname()->release,
-                utsname()->version);
-        return proc_calc_metrics(page, start, off, count, eof, len);
-}
-
 extern const struct seq_operations cpuinfo_op;
 static int cpuinfo_open(struct inode *inode, struct file *file)
 {
@@ -680,7 +668,6 @@ void __init proc_misc_init(void)
                 char *name;
                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
         } *p, simple_ones[] = {
-                {"version",     version_read_proc},
 #ifdef CONFIG_PROC_HARDWARE
                 {"hardware",    hardware_read_proc},
 #endif
diff --git a/fs/proc/version.c b/fs/proc/version.c
new file mode 100644
index 000000000000..76817a60678c
--- /dev/null
+++ b/fs/proc/version.c
@@ -0,0 +1,34 @@
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/utsname.h>
+
+static int version_proc_show(struct seq_file *m, void *v)
+{
+        seq_printf(m, linux_proc_banner,
+                utsname()->sysname,
+                utsname()->release,
+                utsname()->version);
+        return 0;
+}
+
+static int version_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, version_proc_show, NULL);
+}
+
+static const struct file_operations version_proc_fops = {
+        .open           = version_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int __init proc_version_init(void)
+{
+        proc_create("version", 0, NULL, &version_proc_fops);
+        return 0;
+}
+module_init(proc_version_init);