[PATCH] linux-user: Drop unnecessary check in signalfd4 syscall

[Helge Deller]

The signalfd4() syscall takes optional O_NONBLOCK and O_CLOEXEC fcntl
flags.  If the user gave any other invalid flags, the host syscall will
return correct error codes, so simply drop the extra check here.

Signed-off-by: Helge Deller <del...@gmx.de>

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
@@ -7176,9 +7176,6 @@ static abi_long do_signalfd4(int fd, abi_long mask, int 
flags)
     sigset_t host_mask;
     abi_long ret;

-    if (flags & ~(TARGET_O_NONBLOCK | TARGET_O_CLOEXEC)) {
-        return -TARGET_EINVAL;
-    }
     if (!lock_user_struct(VERIFY_READ, target_mask, mask, 1)) {
         return -TARGET_EFAULT;
     }