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>

1 files changed, 7 insertions, 6 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 1dd692132ede..f5d0f8f39a57 100644
--- 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),