kernel: fix race condition between compile_kernelmodules and shared_workdir

Fixes https://bugzilla.yoctoproject.org/show_bug.cgi?id=8127 which causes
[ 1225.089323] 8189es: Unknown symbol cfg80211_scan_done (err -22)
[ 1225.095916] 8189es: no symbol version for cfg80211_remain_on_channel_expired
when loading external compiled 8189es module.

(From OE-Core rev: afcea61e8eb39234d336c706fdfd4680dea7c060)

Signed-off-by: Jens Rehsack <sno@netbsd.org>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 5e8b6cf343..b75a462180 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -217,6 +217,14 @@ do_compile_kernelmodules() {
         unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
         if (grep -q -i -e '^CONFIG_MODULES=y$' ${B}/.config); then
                 oe_runmake -C ${B} ${PARALLEL_MAKE} modules CC="${KERNEL_CC}" LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS}
+
+                # Module.symvers gets updated during the 
+                # building of the kernel modules. We need to
+                # update this in the shared workdir since some
+                # external kernel modules has a dependency on
+                # other kernel modules and will look at this
+                # file to do symbol lookups
+                cp Module.symvers ${STAGING_KERNEL_BUILDDIR}/
         else
                 bbnote "no modules to compile"
         fi