On Thu, May 28, 2020 at 11:56:26AM +0200, Arnd Bergmann wrote: > On NOMMU kernels without CONFIG_MEMCG_KMEM, we now get a harmless > warning about an unused function: > > mm/memcontrol.c:2595:13: error: unused function 'cancel_charge' [-Werror,-Wunused-function] > > Hide this function in a matching #ifdef. > > Fixes: 5bd144bf764c ("mm: memcontrol: drop unused try/commit/cancel charge API") > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> Thanks Arnd!