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Some vendor kernels (Raspberry Pi Foundation 6.18.x) already backport kmalloc_obj/kzalloc_obj natively but with a mandatory GFP argument and no variadic default, breaking every 1-argument call site in this tree when the previous '#ifndef __alloc_objs' guard skipped our own variadic-friendly definitions. Always #undef and redefine instead of trusting the host kernel's version. Deployed and running since 2026-09-14/15 on f6bvp-8 and f6bvp-10 (Raspberry Pi OS, kernel 6.18.x), the two nodes where this vendor backport is actually present; no effect on nodes built against plain upstream headers. Signed-off-by: F6BVP <bernard.f6bvp@gmail.com>
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Some vendor kernels (Raspberry Pi Foundation 6.18.x) already backport
kmalloc_obj/kzalloc_obj natively but with a mandatory GFP argument and
no variadic default, breaking every 1-argument call site in this tree
when the previous '#ifndef __alloc_objs' guard skipped our own
variadic-friendly definitions. Always #undef and redefine instead of
trusting the host kernel's version.
Testing: deployed on f6bvp-8 and f6bvp-10 (Raspberry Pi OS, kernel
6.18.x) since 2026-09-14/15, the two nodes where this vendor backport
is actually present; no effect on nodes built against plain upstream
headers.