[PATCH] linux-user: Drop unnecessary check in dup3 syscall

[Helge Deller]

Drop the extra check in dup3() if anything other than FD_CLOEXEC (aka
O_CLOEXEC) was given. Instead simply rely on any error codes returned by
the host dup3() syscall.

Signed-off-by: Helge Deller <address@hidden>

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 05f03919ff..ebf0d38321 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8301,12 +8310,7 @@ static abi_long do_syscall1(void *cpu_env, int num, 
abi_long arg1,
 #if defined(CONFIG_DUP3) && defined(TARGET_NR_dup3)
     case TARGET_NR_dup3:
     {
-        int host_flags;
-
-        if ((arg3 & ~TARGET_O_CLOEXEC) != 0) {
-            return -EINVAL;
-        }
-        host_flags = target_to_host_bitmask(arg3, fcntl_flags_tbl);
+        int host_flags = target_to_host_bitmask(arg3, fcntl_flags_tbl);
         ret = get_errno(dup3(arg1, arg2, host_flags));
         if (ret >= 0) {
             fd_trans_dup(arg1, arg2);