WebUI incorrectly reports critical camera status on kernels < 3.14 due to missing MemAvailable

[usa-]

On kernels older than 3.14, /proc/meminfo does not contain the MemAvailable so BusyBox free shows 0 in the available column. As a result, the WebUI on Ingenic T31x reports a critical camera status on the main page.

I suggest a workaround: on kernels older than 3.14, use the free column instead of the available column from the free command output (or MemFree instead of MemAvailable from /proc/meminfo) on the main page.

root@openipc-t31:~# cat /proc/meminfo | grep "MemAvailable"
root@openipc-t31:~# free
              total        used        free      shared  buff/cache   available
Mem:          59152       18568       20496           0       20088           0
-/+ buffers/cache:        18568       40584
Swap:             0           0           0

Compare to SigmaStar SSC378DE:

root@openipc-ssc378de:~# cat /proc/meminfo | grep "MemAvailable"
MemAvailable:      32552 kB
root@openipc-ssc378de:~# free
              total        used        free      shared  buff/cache   available
Mem:          53848       14300       25856           0       13692       32620
Swap:             0           0           0