[PATCH] convert packet scheduler API to single_open

[Stephen Hemminger <shemminger@xxxxxxxx>]

Convert /proc/net/psched to use seq_file; almost trivial.

Patch against 2.6.0-test4 bk latest.

diff -Nru a/net/sched/sch_api.c b/net/sched/sch_api.c
--- a/net/sched/sch_api.c       Fri Sep  5 13:58:01 2003
+++ b/net/sched/sch_api.c       Fri Sep  5 13:58:01 2003
@@ -32,6 +32,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/kmod.h>
 
 #include <net/sock.h>
@@ -1059,27 +1060,27 @@
 int psched_tick_per_us = 1;
 
 #ifdef CONFIG_PROC_FS
-static int psched_read_proc(char *buffer, char **start, off_t offset,
-                            int length, int *eof, void *data)
+static int psched_show(struct seq_file *seq, void *v)
 {
-       int len;
-
-       len = sprintf(buffer, "%08x %08x %08x %08x\n",
+       seq_printf(seq, "%08x %08x %08x %08x\n",
                      psched_tick_per_us, psched_us_per_tick,
                      1000000, HZ);
 
-       len -= offset;
-
-       if (len > length)
-               len = length;
-       if(len < 0)
-               len = 0;
-
-       *start = buffer + offset;
-       *eof = 1;
+       return 0;
+}
 
-       return len;
+static int psched_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, psched_show, PDE(inode)->data);
 }
+
+static struct file_operations psched_fops = {
+       .owner = THIS_MODULE,
+       .open = psched_open,
+       .read  = seq_read,
+       .llseek = seq_lseek,
+       .release = single_release,
+};     
 #endif
 
 #if PSCHED_CLOCK_SOURCE == PSCHED_GETTIMEOFDAY
@@ -1250,9 +1251,7 @@
        tc_filter_init();
 #endif
 
-#ifdef CONFIG_PROC_FS
-       create_proc_read_entry("net/psched", 0, 0, psched_read_proc, NULL);
-#endif
+       proc_net_fops_create("psched", 0, &psched_fops);
 
        return 0;
 }