totalram_pages() was converted to an atomic variable in 5.0:
https://patchwork.kernel.org/patch/10652795/
Its value should now be read though the totalram_pages() helper
function.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes#8263
