Implement 32-bit compatibility for waitid(2).

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

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index dfb448c015e..120dd897162 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -221,6 +221,28 @@ sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
         return compat_sys_wait4(pid, stat_addr, options, NULL);
 }
 
+asmlinkage long
+sysn32_waitid(int which, compat_pid_t pid,
+              siginfo_t __user *uinfo, int options,
+              struct compat_rusage __user *uru)
+{
+        struct rusage ru;
+        long ret;
+        mm_segment_t old_fs = get_fs();
+
+        set_fs (KERNEL_DS);
+        ret = sys_waitid(which, pid, uinfo, options,
+                         uru ? (struct rusage __user *) &ru : NULL);
+        set_fs (old_fs);
+
+        if (ret < 0 || uinfo->si_signo == 0)
+                return ret;
+
+        if (uru)
+                ret = put_compat_rusage(&ru, uru);
+        return ret;
+}
+
 struct sysinfo32 {
         s32 uptime;
         u32 loads[3];