The file Documentation/powerpc/ultravisor.rst contains: Only valid value(s) in ``flags`` are: * H_PAGE_IN_SHARED which indicates that the page is to be shared with the Ultravisor. * H_PAGE_IN_NONSHARED indicates that the UV is not anymore interested in the page. Applicable if the page is a shared page. The flag H_PAGE_IN_SHARED exists in the Linux kernel (arch/powerpc/include/asm/hvcall.h), but the flag H_PAGE_IN_NONSHARED does not. Should the documentation be changed in some way? julia