[Qemu-block] [PATCH] aio-posix: Don't use epoll if epoll_create1 not available

[Fam Zheng]

Reported-by: Matthew Fortune <address@hidden>
Signed-off-by: Fam Zheng <address@hidden>
---
 aio-posix.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/aio-posix.c b/aio-posix.c
index fa7f8ab..97e5a0c 100644
--- a/aio-posix.c
+++ b/aio-posix.c
@@ -18,7 +18,9 @@
 #include "block/block.h"
 #include "qemu/queue.h"
 #include "qemu/sockets.h"
-#ifdef CONFIG_EPOLL
+
+#if defined(CONFIG_EPOLL) && defined(CONFIG_EPOLL_CREATE1)
+#define USE_EPOLL 1
 #include <sys/epoll.h>
 #endif
 
@@ -33,7 +35,7 @@ struct AioHandler
     QLIST_ENTRY(AioHandler) node;
 };
 
-#ifdef CONFIG_EPOLL
+#ifdef USE_EPOLL
 
 /* The fd number threashold to switch to epoll */
 #define EPOLL_ENABLE_THRESHOLD 64
@@ -483,7 +485,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
 
 void aio_context_setup(AioContext *ctx, Error **errp)
 {
-#ifdef CONFIG_EPOLL
+#ifdef USE_EPOLL
     assert(!ctx->epollfd);
     ctx->epollfd = epoll_create1(EPOLL_CLOEXEC);
     if (ctx->epollfd == -1) {
-- 
2.4.3