[PATCH] linux-user/syscall.c: add target-to-host mapping for epoll_create1()

[Sergei Trofimovich]

Noticed by Barnabás Virágh as a python-3.7 failue on qemu-alpha.

The bug shows up on alpha as it's one of the targets where
EPOLL_CLOEXEC differs from other targets:
    sysdeps/unix/sysv/linux/alpha/bits/epoll.h: EPOLL_CLOEXEC  = 01000000
    sysdeps/unix/sysv/linux/bits/epoll.h:        EPOLL_CLOEXEC = 02000000

Bug: https://bugs.gentoo.org/717548
Reported-by: Barnabás Virágh
Signed-off-by: Sergei Trofimovich <address@hidden>
CC: Riku Voipio <address@hidden>
CC: Laurent Vivier <address@hidden>
---
 linux-user/syscall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 674f70e70a..05f03919ff 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -12012,7 +12012,7 @@ static abi_long do_syscall1(void *cpu_env, int num, 
abi_long arg1,
 #endif
 #if defined(TARGET_NR_epoll_create1) && defined(CONFIG_EPOLL_CREATE1)
     case TARGET_NR_epoll_create1:
-        return get_errno(epoll_create1(arg1));
+        return get_errno(epoll_create1(target_to_host_bitmask(arg1, 
fcntl_flags_tbl)));
 #endif
 #if defined(TARGET_NR_epoll_ctl)
     case TARGET_NR_epoll_ctl:
-- 
2.26.1