commit f5bf180d8941bace03b0ab4009609e234769a34b
author Arnav Kansal <rnv@google.com> Thu Mar 21 22:50:37 2024 +0000
committer Arnav Kansal <rnv@google.com> Fri Mar 22 00:00:28 2024 +0000
tree bac75e22fbf0b972971c9ba54e6c20c458492752
parent bd06d31b3825cdd549f41b5cd88a7bf5a91f36b7

Patch driver builds affected by pfn_valid regression for cos-gpu-driver-builder

linux-5.10.210/ linux-5.15.149 has modified the non-ARCH-specific
pfn_valid() to use __rcu_read_lock/unlock[1][2] that is marked GPL and
cannot be used for non open source nvidia gpu driver builds.

As a workaround, reuse the old implementation for pfn_valid.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/include/linux/mmzone.h?h=v5.10.210&id=90ad17575d26874287271127d43ef3c2af876cea
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/include/linux/mmzone.h?h=v5.15.149&id=b448de2459b6d62a53892487ab18b7d823ff0529

BUG=b/326550811, b/326701851
TEST=manual
RELEASE_NOTE=Fix driver builds for drivers affected with pfn_valid build
errors.

Change-Id: I0d4f272a73cab34f027104a66830c57147fb8e22
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/67830
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Tested-by: Arnav Kansal <rnv@google.com>
Reviewed-by: Kevin Berry <kpberry@google.com>