compat: account for grsecurity backports and changes

grsecurity kernels tend to carry additional backports and changes, like
commit b60b87fc2996 ("netlink: add ethernet address policy types") or
the SYM_FUNC_* changes. RAP nowadays hooks the latter, therefore no
diversion to RAP_ENTRY is needed any more.

Instead of relying on the kernel version test, also test for the macros
we're about to define to not already be defined to account for these
additional changes in the grsecurity patch without breaking
compatibility to the older public ones.

Also test for CONFIG_PAX instead of RAP_PLUGIN for the timer API related
changes as these don't depend on the RAP plugin to be enabled but just a
PaX/grsecurity patch to be applied. While there is no preprocessor knob
for the latter, use CONFIG_PAX as this will likely be enabled in every
kernel that uses the patch.

Signed-off-by: Mathias Krause <minipli@grsecurity.net>
[zx2c4: small changes to include a header nearby a macro def test]
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

0 files changed, 0 insertions, 0 deletions