proc: convert /proc/$PID/syscall 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 1dd6921..f5d0f8f 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -482,7 +482,8 @@ static int proc_pid_limits(struct seq_file *m, struct pid_namespace *ns,
 }
 
 #ifdef CONFIG_HAVE_ARCH_TRACEHOOK
-static int proc_pid_syscall(struct task_struct *task, char *buffer)
+static int proc_pid_syscall(struct seq_file *m, struct pid_namespace *ns,
+                           struct pid *pid, struct task_struct *task)
 {
        long nr;
        unsigned long args[6], sp, pc;
@@ -491,11 +492,11 @@ static int proc_pid_syscall(struct task_struct *task, char *buffer)
                return res;
 
        if (task_current_syscall(task, &nr, args, 6, &sp, &pc))
-               res = sprintf(buffer, "running\n");
+               seq_puts(m, "running\n");
        else if (nr < 0)
-               res = sprintf(buffer, "%ld 0x%lx 0x%lx\n", nr, sp, pc);
+               seq_printf(m, "%ld 0x%lx 0x%lx\n", nr, sp, pc);
        else
-               res = sprintf(buffer,
+               seq_printf(m,
                       "%ld 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
                       nr,
                       args[0], args[1], args[2], args[3], args[4], args[5],
@@ -2564,7 +2565,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 #endif
        REG("comm",      S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
 #ifdef CONFIG_HAVE_ARCH_TRACEHOOK
-       INF("syscall",    S_IRUSR, proc_pid_syscall),
+       ONE("syscall",    S_IRUSR, proc_pid_syscall),
 #endif
        INF("cmdline",    S_IRUGO, proc_pid_cmdline),
        ONE("stat",       S_IRUGO, proc_tgid_stat),
@@ -2900,7 +2901,7 @@ static const struct pid_entry tid_base_stuff[] = {
 #endif
        REG("comm",      S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
 #ifdef CONFIG_HAVE_ARCH_TRACEHOOK
-       INF("syscall",   S_IRUSR, proc_pid_syscall),
+       ONE("syscall",   S_IRUSR, proc_pid_syscall),
 #endif
        INF("cmdline",   S_IRUGO, proc_pid_cmdline),
        ONE("stat",      S_IRUGO, proc_tid_stat),