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Thu, 26 Oct 2023 11:33:22 -0700 (PDT) MIME-Version: 1.0 References: <20231024134637.3120277-1-surenb@google.com> <20231024134637.3120277-29-surenb@google.com> <87h6me620j.ffs@tglx> In-Reply-To: <87h6me620j.ffs@tglx> From: Suren Baghdasaryan Date: Thu, 26 Oct 2023 18:33:09 +0000 Message-ID: Subject: Re: [PATCH v2 28/39] timekeeping: Fix a circular include dependency To: Thomas Gleixner Cc: akpm@linux-foundation.org, kent.overstreet@linux.dev, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, corbet@lwn.net, void@manifault.com, peterz@infradead.org, juri.lelli@redhat.com, ldufour@linux.ibm.com, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, david@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, hughd@google.com, andreyknvl@gmail.com, keescook@chromium.org, ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, shakeelb@google.com, songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, minchan@google.com, kaleshsingh@google.com, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, cgroups@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 02B69C0005 X-Stat-Signature: q56tppkjmssa74g6w9g7fdugneeetzsr X-Rspam-User: X-HE-Tag: 1698345203-468991 X-HE-Meta: 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 C3SFYlMM ki/KutY6MSsT61xm2TFX92Rda/Ysk1EkRV3uy28t8/9QEJPIOy1LojmOyh4IA3Z+SVLTLan40+tEv4wyUnI2NmVXHhJ+NRBiADreZdmqZhb0iTlbFQG21SQrTf8zDg9HIT2EYfoVl2Y8rbJIQNGN0Mzcv8XWQ9EZ8JkVs15oiStdfmnU4ZACTaFkjCr/y0DHUeS6ACrGHHlNoLwD+nJa5AxcBRdjSh5OpfFeYw4+IZAa7Y1fIMpVuSqH5FhoIdSSpiy27dKMKEUml/RLNWDRojFbKf41XBXAevFlSQwuvBUt6yLUgcuJM7BuvdgM8dtjOvAMi6jWJXYMms3E8+TxvjAITgybB09thEpVn4JeIP94qdIbTxJPAQydRSRQMWGIJOwm6d07tpxDvVfZGioAiRp+mew== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000006, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Oct 25, 2023 at 5:33=E2=80=AFPM Thomas Gleixner wrote: > > On Tue, Oct 24 2023 at 06:46, Suren Baghdasaryan wrote: > > From: Kent Overstreet > > > > This avoids a circular header dependency in an upcoming patch by only > > making hrtimer.h depend on percpu-defs.h > > What's the actual dependency problem? Sorry for the delay. When we instrument per-cpu allocations in [1] we need to include sched.h in percpu.h to be able to use alloc_tag_save(). sched.h includes hrtimer.h. So, without this change we end up with a circular inclusion: percpu.h->sched.h->hrtimer.h->percpu.h [1] https://lore.kernel.org/all/20231024134637.3120277-32-surenb@google.com= / >