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Tue, 18 Mar 2025 22:04:10 -0700 (PDT) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250319133309.6fce6404@canb.auug.org.au> In-Reply-To: <20250319133309.6fce6404@canb.auug.org.au> From: Uros Bizjak Date: Wed, 19 Mar 2025 06:03:58 +0100 X-Gm-Features: AQ5f1JrBsC7ZnHFadNWISPWdsbiOW1kMeosysAWck6DOgmlA0PRxbvzsNi9Gfvc Message-ID: Subject: Re: linux-next: build failure after merge of the bpf-next tree To: Stephen Rothwell Cc: Daniel Borkmann , Alexei Starovoitov , Andrii Nakryiko , Andrew Morton , bpf , Networking , Linux Kernel Mailing List , Linux Next Mailing List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, Mar 19, 2025 at 3:33=E2=80=AFAM Stephen Rothwell wrote: > Caused by the resilient-queued-spin-lock branch of the bpf-next tree > interacting with the "Enable strict percpu address space checks" series > form the mm-stable tree. > > I don't know why this happens, but reverting that branch inf the bpf-next > tree makes the failure go away, so I have done that for today. percpu pointers are now checked by the compiler, and their address spaces have to be handled properly. It is like "sparse" rule, but now enforced by the compiler. This functionality was in fact introduced to catch programming errors like = this. Thanks, Uros.