qemu: fix memfd_create with glibc 2.27

glibc 2.27 has added memfd_create() but this conflicts with a copy in qemu, so
take a patch from upstream to fix building with glibc 2.27.

(From OE-Core rev: f90ce8913a4635ffb4ac0c585413e84f06793784)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 58 insertions, 1 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/memfd.patch b/meta/recipes-devtools/qemu/qemu/memfd.patch
new file mode 100644
index 0000000000..62e8d3800b
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/memfd.patch
@@ -0,0 +1,57 @@
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+From 75e5b70e6b5dcc4f2219992d7cffa462aa406af0 Mon Sep 17 00:00:00 2001
+From: Paolo Bonzini <pbonzini@redhat.com>
+Date: Tue, 28 Nov 2017 11:51:27 +0100
+Subject: [PATCH] memfd: fix configure test
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Recent glibc added memfd_create in sys/mman.h.  This conflicts with
+the definition in util/memfd.c:
+
+    /builddir/build/BUILD/qemu-2.11.0-rc1/util/memfd.c:40:12: error: static declaration of memfd_create follows non-static declaration
+
+Fix the configure test, and remove the sys/memfd.h inclusion since the
+file actually does not exist---it is a typo in the memfd_create(2) man
+page.
+
+Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+---
+ configure    | 2 +-
+ util/memfd.c | 4 +---
+ 2 files changed, 2 insertions(+), 4 deletions(-)
+
+diff --git a/configure b/configure
+index 9c8aa5a98b..99ccc1725a 100755
+--- a/configure
++++ b/configure
+@@ -3923,7 +3923,7 @@ fi
+ # check if memfd is supported
+ memfd=no
+ cat > $TMPC << EOF
+-#include <sys/memfd.h>
++#include <sys/mman.h>
+ 
+ int main(void)
+ {
+diff --git a/util/memfd.c b/util/memfd.c
+index 4571d1aba8..412e94a405 100644
+--- a/util/memfd.c
++++ b/util/memfd.c
+@@ -31,9 +31,7 @@
+ 
+ #include "qemu/memfd.h"
+ 
+-#ifdef CONFIG_MEMFD
+-#include <sys/memfd.h>
+-#elif defined CONFIG_LINUX
++#if defined CONFIG_LINUX && !defined CONFIG_MEMFD
+ #include <sys/syscall.h>
+ #include <asm/unistd.h>
+ 
+-- 
+2.11.0
diff --git a/meta/recipes-devtools/qemu/qemu_2.10.0.bb b/meta/recipes-devtools/qemu/qemu_2.10.0.bb
index a9b4939b04..bdf6c21f87 100644
--- a/meta/recipes-devtools/qemu/qemu_2.10.0.bb
+++ b/meta/recipes-devtools/qemu/qemu_2.10.0.bb
@@ -29,6 +29,7 @@ SRC_URI = "http://wiki.qemu-project.org/download/${BP}.tar.bz2 \
            file://CVE-2017-13672.patch \
            file://CVE-2017-14167.patch \
            file://ppc_locking.patch \
+           file://memfd.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+\..*)\.tar"
 
@@ -60,4 +61,3 @@ do_install_ptest() {
 
         cp ${S}/tests/Makefile.include ${D}${PTEST_PATH}/tests
 }
-