Refactoring broke the balloon driver, and fixing kallsyms on ARM broke

some (non-ARM) MMUless setups, so we're making that fix ARM-only for now.
 
 Unfortunately, the ARM refactoring which broke kallsyms/perf was CC:stable,
 so the fix (which broken non-ARM) was also CC:stable, so now the partial
 reversion is also CC:stable...
 
 Cheers,
 Rusty.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.14 (GNU/Linux)
 
 iQIcBAABAgAGBQJSt36RAAoJENkgDmzRrbjxsPQP+wdDsF36aOA3lr81gquXTYBT
 pbDVANqc8+p3kWkzGNGYBBvbvTDzw96UVM22A1PwUHOLFIL1GnQvTcn8CXIGgjp5
 oVUrREPureXJXivxQxBngf6DIY4Nx/Q9tCqtC+91g/3rxC7ufPG0BJJfnX6Yw9T6
 jKSVAMdZD2AtZMG64ARk6k+urCod0QAJBbrtlWS9TJdm9HBFaY+GX+8UZazN5FYQ
 NWm93SyXHqK4dGsi4CzKEq530FDBtXrFQQkJl50CDIReRlZfN6k6OFK9XVaj/GyX
 W263soaaILrZbxUlY31b8lx5z3RoiM10BL6XsGUavQEv75UnrnlENdr2ndGLwH51
 OLKeU6xW6APlECDprj97anzeJFHjhk/VHKGPGhsV9kC1E9VeVO0f3ABejbvEwjpS
 Md5aLdlGtv8lmGI/0Qxm7VArpVnEhzZJ5MiE9QEIdDn0E+pmjeBYiOVNv7GA5WNU
 AXPVQiGOlyEXI1VzewdSwwvJGU32QIiJ5JCWJHcZiu6ACmXyVtDsiXDQkoaMYWZu
 4FGlvWEErAknNfPeKzMh5SOzz4BDkXJd093tBrz3OFGuPeJIZKnGJTbLxATZo6CH
 b4fV6v0aalQtpSBUKvIfixTiZeKm+nVtRPOnFSvqijsl25yk1HIpHqhKmM4GTb4V
 Frqr7JFWS18DsdqkqC0c
 =g8Et
 -----END PGP SIGNATURE-----

Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull virtio balloon driver fixes from Rusty Russell:
 "Refactoring broke the balloon driver, and fixing kallsyms on ARM broke
  some (non-ARM) MMUless setups, so we're making that fix ARM-only for
  now.

  Unfortunately, the ARM refactoring which broke kallsyms/perf was
  CC:stable, so the fix (which broken non-ARM) was also CC:stable, so
  now the partial reversion is also CC:stable..."

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  scripts/link-vmlinux.sh: only filter kernel symbols for arm
  virtio_balloon: update_balloon_size(): update correct field

drivers/virtio/virtio_balloon.c

@@ -285,7 +285,7 @@ static void update_balloon_size(struct virtio_balloon *vb)
 {
 	__le32 actual = cpu_to_le32(vb->num_pages);
 
-	virtio_cwrite(vb->vdev, struct virtio_balloon_config, num_pages,
+	virtio_cwrite(vb->vdev, struct virtio_balloon_config, actual,
 		      &actual);
 }
 

scripts/link-vmlinux.sh

@@ -82,7 +82,9 @@ kallsyms()
 		kallsymopt="${kallsymopt} --all-symbols"
 	fi
 
+	if [ -n "${CONFIG_ARM}" ] && [ -n "${CONFIG_PAGE_OFFSET}" ]; then
 		kallsymopt="${kallsymopt} --page-offset=$CONFIG_PAGE_OFFSET"
+	fi
 
 	local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL}               \
 		      ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"