proc: convert /proc/$PID/limits to seq_file interface

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 154bbd353b10732cc3fd637f16c38322891af410..1dd692132ede0be8879e2e9ed3b18f6383755774 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -440,12 +440,11 @@ static const struct limit_names lnames[RLIM_NLIMITS] = {
 };
 
 /* Display limits for a process */
-static int proc_pid_limits(struct task_struct *task, char *buffer)
+static int proc_pid_limits(struct seq_file *m, struct pid_namespace *ns,
+                          struct pid *pid, struct task_struct *task)
 {
        unsigned int i;
-       int count = 0;
        unsigned long flags;
-       char *bufptr = buffer;
 
        struct rlimit rlim[RLIM_NLIMITS];
 
@@ -457,31 +456,29 @@ static int proc_pid_limits(struct task_struct *task, char *buffer)
        /*
         * print the file header
         */
-       count += sprintf(&bufptr[count], "%-25s %-20s %-20s %-10s\n",
+       seq_printf(m, "%-25s %-20s %-20s %-10s\n",
                        "Limit", "Soft Limit", "Hard Limit", "Units");
 
        for (i = 0; i < RLIM_NLIMITS; i++) {
                if (rlim[i].rlim_cur == RLIM_INFINITY)
-                       count += sprintf(&bufptr[count], "%-25s %-20s ",
+                       seq_printf(m, "%-25s %-20s ",
                                         lnames[i].name, "unlimited");
                else
-                       count += sprintf(&bufptr[count], "%-25s %-20lu ",
+                       seq_printf(m, "%-25s %-20lu ",
                                         lnames[i].name, rlim[i].rlim_cur);
 
                if (rlim[i].rlim_max == RLIM_INFINITY)
-                       count += sprintf(&bufptr[count], "%-20s ", "unlimited");
+                       seq_printf(m, "%-20s ", "unlimited");
                else
-                       count += sprintf(&bufptr[count], "%-20lu ",
-                                        rlim[i].rlim_max);
+                       seq_printf(m, "%-20lu ", rlim[i].rlim_max);
 
                if (lnames[i].unit)
-                       count += sprintf(&bufptr[count], "%-10s\n",
-                                        lnames[i].unit);
+                       seq_printf(m, "%-10s\n", lnames[i].unit);
                else
-                       count += sprintf(&bufptr[count], "\n");
+                       seq_putc(m, '\n');
        }
 
-       return count;
+       return 0;
 }
 
 #ifdef CONFIG_HAVE_ARCH_TRACEHOOK
@@ -2558,7 +2555,7 @@ static const struct pid_entry tgid_base_stuff[] = {
        ONE("auxv",       S_IRUSR, proc_pid_auxv),
        ONE("status",     S_IRUGO, proc_pid_status),
        ONE("personality", S_IRUSR, proc_pid_personality),
-       INF("limits",     S_IRUGO, proc_pid_limits),
+       ONE("limits",     S_IRUGO, proc_pid_limits),
 #ifdef CONFIG_SCHED_DEBUG
        REG("sched",      S_IRUGO|S_IWUSR, proc_pid_sched_operations),
 #endif
@@ -2897,7 +2894,7 @@ static const struct pid_entry tid_base_stuff[] = {
        ONE("auxv",      S_IRUSR, proc_pid_auxv),
        ONE("status",    S_IRUGO, proc_pid_status),
        ONE("personality", S_IRUSR, proc_pid_personality),
-       INF("limits",    S_IRUGO, proc_pid_limits),
+       ONE("limits",    S_IRUGO, proc_pid_limits),
 #ifdef CONFIG_SCHED_DEBUG
        REG("sched",     S_IRUGO|S_IWUSR, proc_pid_sched_operations),
 #endif