proc: remove use of seq_printf return value

The seq_printf return value, because it's frequently misused,
will eventually be converted to void.

See: commit 1f33c41c03da ("seq_file: Rename seq_overflow() to
     seq_has_overflowed() and make public")

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 13f047a..fd02a9e 100644 (file)
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -632,7 +632,9 @@ static int children_seq_show(struct seq_file *seq, void *v)
        pid_t pid;
 
        pid = pid_nr_ns(v, inode->i_sb->s_fs_info);
-       return seq_printf(seq, "%d ", pid);
+       seq_printf(seq, "%d ", pid);
+
+       return 0;
 }
 
 static void *children_seq_start(struct seq_file *seq, loff_t *pos)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3f3d7ae..7a3b82f 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -238,13 +238,15 @@ static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns,
 
        wchan = get_wchan(task);
 
-       if (lookup_symbol_name(wchan, symname) < 0)
+       if (lookup_symbol_name(wchan, symname) < 0) {
                if (!ptrace_may_access(task, PTRACE_MODE_READ))
                        return 0;
-               else
-                       return seq_printf(m, "%lu", wchan);
-       else
-               return seq_printf(m, "%s", symname);
+               seq_printf(m, "%lu", wchan);
+       } else {
+               seq_printf(m, "%s", symname);
+       }
+
+       return 0;
 }
 #endif /* CONFIG_KALLSYMS */
 
@@ -309,10 +311,12 @@ static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
 static int proc_pid_schedstat(struct seq_file *m, struct pid_namespace *ns,
                              struct pid *pid, struct task_struct *task)
 {
-       return seq_printf(m, "%llu %llu %lu\n",
-                       (unsigned long long)task->se.sum_exec_runtime,
-                       (unsigned long long)task->sched_info.run_delay,
-                       task->sched_info.pcount);
+       seq_printf(m, "%llu %llu %lu\n",
+                  (unsigned long long)task->se.sum_exec_runtime,
+                  (unsigned long long)task->sched_info.run_delay,
+                  task->sched_info.pcount);
+
+       return 0;
 }
 #endif
 
@@ -387,7 +391,9 @@ static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns,
                points = oom_badness(task, NULL, NULL, totalpages) *
                                                1000 / totalpages;
        read_unlock(&tasklist_lock);
-       return seq_printf(m, "%lu\n", points);
+       seq_printf(m, "%lu\n", points);
+
+       return 0;
 }
 
 struct limit_names {
@@ -432,15 +438,15 @@ static int proc_pid_limits(struct seq_file *m, struct pid_namespace *ns,
         * print the file header
         */
        seq_printf(m, "%-25s %-20s %-20s %-10s\n",
-                       "Limit", "Soft Limit", "Hard Limit", "Units");
+                 "Limit", "Soft Limit", "Hard Limit", "Units");
 
        for (i = 0; i < RLIM_NLIMITS; i++) {
                if (rlim[i].rlim_cur == RLIM_INFINITY)
                        seq_printf(m, "%-25s %-20s ",
-                                        lnames[i].name, "unlimited");
+                                  lnames[i].name, "unlimited");
                else
                        seq_printf(m, "%-25s %-20lu ",
-                                        lnames[i].name, rlim[i].rlim_cur);
+                                  lnames[i].name, rlim[i].rlim_cur);
 
                if (rlim[i].rlim_max == RLIM_INFINITY)
                        seq_printf(m, "%-20s ", "unlimited");
@@ -462,7 +468,9 @@ static int proc_pid_syscall(struct seq_file *m, struct pid_namespace *ns,
 {
        long nr;
        unsigned long args[6], sp, pc;
-       int res = lock_trace(task);
+       int res;
+
+       res = lock_trace(task);
        if (res)
                return res;
 
@@ -477,7 +485,8 @@ static int proc_pid_syscall(struct seq_file *m, struct pid_namespace *ns,
                       args[0], args[1], args[2], args[3], args[4], args[5],
                       sp, pc);
        unlock_trace(task);
-       return res;
+
+       return 0;
 }
 #endif /* CONFIG_HAVE_ARCH_TRACEHOOK */
 
@@ -2002,12 +2011,13 @@ static int show_timer(struct seq_file *m, void *v)
        notify = timer->it_sigev_notify;
 
        seq_printf(m, "ID: %d\n", timer->it_id);
-       seq_printf(m, "signal: %d/%p\n", timer->sigq->info.si_signo,
-                       timer->sigq->info.si_value.sival_ptr);
+       seq_printf(m, "signal: %d/%p\n",
+                  timer->sigq->info.si_signo,
+                  timer->sigq->info.si_value.sival_ptr);
        seq_printf(m, "notify: %s/%s.%d\n",
-               nstr[notify & ~SIGEV_THREAD_ID],
-               (notify & SIGEV_THREAD_ID) ? "tid" : "pid",
-               pid_nr_ns(timer->it_pid, tp->ns));
+                  nstr[notify & ~SIGEV_THREAD_ID],
+                  (notify & SIGEV_THREAD_ID) ? "tid" : "pid",
+                  pid_nr_ns(timer->it_pid, tp->ns));
        seq_printf(m, "ClockID: %d\n", timer->it_clock);
 
        return 0;
@@ -2352,21 +2362,23 @@ static int do_io_accounting(struct task_struct *task, struct seq_file *m, int wh
 
                unlock_task_sighand(task, &flags);
        }
-       result = seq_printf(m,
-                       "rchar: %llu\n"
-                       "wchar: %llu\n"
-                       "syscr: %llu\n"
-                       "syscw: %llu\n"
-                       "read_bytes: %llu\n"
-                       "write_bytes: %llu\n"
-                       "cancelled_write_bytes: %llu\n",
-                       (unsigned long long)acct.rchar,
-                       (unsigned long long)acct.wchar,
-                       (unsigned long long)acct.syscr,
-                       (unsigned long long)acct.syscw,
-                       (unsigned long long)acct.read_bytes,
-                       (unsigned long long)acct.write_bytes,
-                       (unsigned long long)acct.cancelled_write_bytes);
+       seq_printf(m,
+                  "rchar: %llu\n"
+                  "wchar: %llu\n"
+                  "syscr: %llu\n"
+                  "syscw: %llu\n"
+                  "read_bytes: %llu\n"
+                  "write_bytes: %llu\n"
+                  "cancelled_write_bytes: %llu\n",
+                  (unsigned long long)acct.rchar,
+                  (unsigned long long)acct.wchar,
+                  (unsigned long long)acct.syscr,
+                  (unsigned long long)acct.syscw,
+                  (unsigned long long)acct.read_bytes,
+                  (unsigned long long)acct.write_bytes,
+                  (unsigned long long)acct.cancelled_write_bytes);
+       result = 0;
+
 out_unlock:
        mutex_unlock(&task->signal->cred_guard_mutex);
        return result;