deps.c implements zap_page_range_single() as a runtime compat shim
(resolved via kallsyms_lookup_name), but deps.h never declared its
prototype, and binder_alloc.c did not include deps.h. Newer compilers
(Clang, building with -std=gnu11 and later defaults) treat an
implicit function declaration as a hard error rather than a warning,
so the module fails to build:
binder_alloc.c:1029:3: error: call to undeclared function
'zap_page_range_single'; ISO C99 and later do not support implicit
function declarations [-Wimplicit-function-declaration]
Declare the prototype in deps.h and include it from binder_alloc.c.
Verified the module builds and links cleanly (binder_linux.ko) against
kernel 7.1.1 with the fix applied; previously failed with the error
above.
* Use shrinker pointer instead of shrink struct for 6.7+, due to the `shrinker_alloc` function always return the pointer.
* Most of the codes are stolen from drivers/android/binder_alloc.c
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was very outdated.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.
