kernel.bbclass: update KERNEL_IMAGE_MAXSIZE

* Make KERNEL_IMAGE_MAXSIZE and IMAGE_ROOTFS_SIZE have the same algorithm:
  - Use Kbytes as the unit since we use this in other codes.
  - Use "du" rather than "ls" to figure out the size since we use this in
    image.py.

[YOCTO #2610]

(From OE-Core rev: 7384d2831c713ac5999aca83c312154dc15cec56)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index f5d725878f..b2e9d4cb36 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -422,10 +422,13 @@ addtask do_strip before do_sizecheck after do_kernel_link_vmlinux
 # with a fixed length or there is a limit in transferring the kernel to memory
 do_sizecheck() {
         if [ ! -z "${KERNEL_IMAGE_MAXSIZE}" ]; then
-                cd ${B}
-                size=`ls -lL ${KERNEL_OUTPUT} | awk '{ print $5}'`
+                invalid=`echo ${KERNEL_IMAGE_MAXSIZE} | sed 's/[0-9]//g'`
+                if [ -n "$invalid" ]; then
+                        die "Invalid KERNEL_IMAGE_MAXSIZE: ${KERNEL_IMAGE_MAXSIZE}, should be an integerx (The unit is Kbytes)"
+                fi
+                size=`du -ks ${B}/${KERNEL_OUTPUT} | awk '{ print $1}'`
                 if [ $size -ge ${KERNEL_IMAGE_MAXSIZE} ]; then
-                        die "This kernel (size=$size > ${KERNEL_IMAGE_MAXSIZE}) is too big for your device. Please reduce the size of the kernel by making more of it modular."
+                        die "This kernel (size=$size(K) > ${KERNEL_IMAGE_MAXSIZE}(K)) is too big for your device. Please reduce the size of the kernel by making more of it modular."
                 fi
         fi
 }