Implement 32-bit compatibility for waitid(2).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 8ddfbd8d425a..d50daee51fba 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -902,3 +902,30 @@ asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t *uinfo)
         set_fs (old_fs);
         return ret;
 }
+
+asmlinkage long
+sys32_waitid(int which, compat_pid_t pid,
+             compat_siginfo_t __user *uinfo, int options,
+             struct compat_rusage __user *uru)
+{
+        siginfo_t info;
+        struct rusage ru;
+        long ret;
+        mm_segment_t old_fs = get_fs();
+
+        info.si_signo = 0;
+        set_fs (KERNEL_DS);
+        ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options,
+                         uru ? (struct rusage __user *) &ru : NULL);
+        set_fs (old_fs);
+
+        if (ret < 0 || info.si_signo == 0)
+                return ret;
+
+        if (uru && (ret = put_compat_rusage(&ru, uru)))
+                return ret;
+
+        BUG_ON(info.si_code & __SI_MASK);
+        info.si_code |= __SI_CHLD;
+        return copy_siginfo_to_user32(uinfo, &info);
+}