posix-aio-compat.c: fix warning with _FORTIFY_SOURCE

CC    posix-aio-compat.o
cc1: warnings being treated as errors
posix-aio-compat.c: In function 'aio_signal_handler':
posix-aio-compat.c:505: error: ignoring return value of 'write', declared with attribute warn_unused_result
make: *** [posix-aio-compat.o] Error 1

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/posix-aio-compat.c b/posix-aio-compat.c
index dc14f5355d47f0bb12c00eac697431d8c60ad51e..b43c5315a815572e19d95b44af555445bb53c49b 100644 (file)
--- a/posix-aio-compat.c
+++ b/posix-aio-compat.c
@@ -501,8 +501,11 @@ static void aio_signal_handler(int signum)
 {
     if (posix_aio_state) {
         char byte = 0;
+        ssize_t ret;
 
-        write(posix_aio_state->wfd, &byte, sizeof(byte));
+        ret = write(posix_aio_state->wfd, &byte, sizeof(byte));
+        if (ret < 0 && errno != EAGAIN)
+            die("write()");
     }
 
     qemu_service_io();