proc: switch /proc/uptime to seq_file

and move it to fs/proc/uptime.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 bf2ab4d..27efa14 100644 (file)
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -10,6 +10,7 @@ proc-$(CONFIG_MMU)    := mmu.o task_mmu.o
 proc-y       += inode.o root.o base.o generic.o array.o \
                proc_tty.o proc_misc.o
 proc-y += loadavg.o
+proc-y += uptime.o
 proc-$(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 ff42206..484b601 100644 (file)
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -78,26 +78,6 @@ static int proc_calc_metrics(char *page, char **start, off_t off,
        return len;
 }
 
-static int uptime_read_proc(char *page, char **start, off_t off,
-                                int count, int *eof, void *data)
-{
-       struct timespec uptime;
-       struct timespec idle;
-       int len;
-       cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
-
-       do_posix_clock_monotonic_gettime(&uptime);
-       monotonic_to_bootbased(&uptime);
-       cputime_to_timespec(idletime, &idle);
-       len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
-                       (unsigned long) uptime.tv_sec,
-                       (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
-                       (unsigned long) idle.tv_sec,
-                       (idle.tv_nsec / (NSEC_PER_SEC / 100)));
-
-       return proc_calc_metrics(page, start, off, count, eof, len);
-}
-
 int __attribute__((weak)) arch_report_meminfo(char *page)
 {
        return 0;
@@ -836,7 +816,6 @@ void __init proc_misc_init(void)
                char *name;
                int (*read_proc)(char*,char**,off_t,int,int*,void*);
        } *p, simple_ones[] = {
-               {"uptime",      uptime_read_proc},
                {"meminfo",     meminfo_read_proc},
                {"version",     version_read_proc},
 #ifdef CONFIG_PROC_HARDWARE

diff --git a/fs/proc/uptime.c b/fs/proc/uptime.c
new file mode 100644 (file)
index 0000000..0c10a0b
--- /dev/null
+++ b/fs/proc/uptime.c
@@ -0,0 +1,43 @@
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/time.h>
+#include <asm/cputime.h>
+
+static int uptime_proc_show(struct seq_file *m, void *v)
+{
+       struct timespec uptime;
+       struct timespec idle;
+       cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
+
+       do_posix_clock_monotonic_gettime(&uptime);
+       monotonic_to_bootbased(&uptime);
+       cputime_to_timespec(idletime, &idle);
+       seq_printf(m, "%lu.%02lu %lu.%02lu\n",
+                       (unsigned long) uptime.tv_sec,
+                       (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
+                       (unsigned long) idle.tv_sec,
+                       (idle.tv_nsec / (NSEC_PER_SEC / 100)));
+       return 0;
+}
+
+static int uptime_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, uptime_proc_show, NULL);
+}
+
+static const struct file_operations uptime_proc_fops = {
+       .open           = uptime_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
+static int __init proc_uptime_init(void)
+{
+       proc_create("uptime", 0, NULL, &uptime_proc_fops);
+       return 0;
+}
+module_init(proc_uptime_init);