Over the last years, many fixes and changes have been applied to
Binder in the Linux kernel, but these fixes were never backported
to anbox-modules. The meant that the version of Binder in anbox-modules
was very outdated.
With this commit, Binder has been update to the latest state from
the Linux kernel. This should also fix the compile on kernel 5.12
and later.
With kernel 5.8, the return value of map_kernel_range_noflush()
was changed. This function now returns 0 on success (instead of
the number of successfully mapped pages).
This commit adjusts binder accordingly.
With the commit 64fe66e8a95e in the Linux kernel, the member "mmap_sem" in the
struct mm_struct was renamed to "mmap_lock". This patch fixes the resulting
compile errors.
Christian Hoff