By default, /dev/mem can no longer be used to access RAM; Fedora and Red
Hat have applied this patch for years, but now it has found its way into
Looking at the latest git, the default is CONFIG_NONPROMISC_DEVMEM=n,
which means, /dev/mem is set to promiscuous mode, contradictory to quote
above. Ingo's commit "1f56cf1c58c81f7ecf16f5e99ac4a333d9dc9aea" seems to
have done that. Am I missing something?