Re: [PATCH v2 1/5] uaccess: Add user_read_access_begin/end and user_write_access_begin/end

On Fri, 2020-04-03 at 07:20:50 UTC, Christophe Leroy wrote: > Some architectures like powerpc64 have the capability to separate > read access and write access protection. > For get_user() and copy_from_user(), powerpc64 only open read access. > For put_user() and copy_to_user(), powerpc64 only open

[PATCH v2 1/5] uaccess: Add user_read_access_begin/end and user_write_access_begin/end

Some architectures like powerpc64 have the capability to separate read access and write access protection. For get_user() and copy_from_user(), powerpc64 only open read access. For put_user() and copy_to_user(), powerpc64 only open write access. But when using unsafe_get_user() or unsafe_put_user()