Relax posix-aio restrictions on newer glibcs

RedHat 9 shipped glibc 2.3.  Modern versions of glibc do not have the aio thread
exit issue that the comment references.  This patch adjusts the check to only
limit aio_init on glibc versions < 2.4.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5304 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/block-raw-posix.c b/block-raw-posix.c
index 41f9976..97dd30a 100644 (file)
--- a/block-raw-posix.c
+++ b/block-raw-posix.c
@@ -545,7 +545,7 @@ static int posix_aio_init(void)
 
     qemu_aio_set_fd_handler(s->fd, posix_aio_read, NULL, posix_aio_flush, s);
 
-#if defined(__GLIBC__) && defined(__linux__)
+#if defined(__linux__) && defined(__GLIBC_PREREQ) && !__GLIBC_PREREQ(2, 4)
     {
         /* XXX: aio thread exit seems to hang on RedHat 9 and this init
            seems to fix the problem. */