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Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Arnaldo Carvalho de Melo , Paolo Bonzini , Arnd Bergmann , Frederic Weisbecker , "Paul E. McKenney" , Jason Baron , Steven Rostedt , Ard Biesheuvel , Sami Tolvanen , "David S. Miller" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Mel Gorman , Andrew Morton , Masahiro Yamada , Han Shen , Rik van Riel , Jann Horn , Dan Carpenter , Oleg Nesterov , Juri Lelli , Clark Williams , Yair Podemsky , Marcelo Tosatti , Daniel Wagner , Petr Tesarik Subject: [PATCH v6 07/29] x86/paravirt: Mark pv_sched_clock static call as __ro_after_init Date: Fri, 10 Oct 2025 17:38:17 +0200 Message-ID: <20251010153839.151763-8-vschneid@redhat.com> In-Reply-To: <20251010153839.151763-1-vschneid@redhat.com> References: <20251010153839.151763-1-vschneid@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Rspam-User: X-Rspamd-Queue-Id: E43B5180005 X-Rspamd-Server: rspam02 X-Stat-Signature: p685hsn3dzw5zh3aifmmuur6ja9tbfix X-HE-Tag: 1760110963-7515 X-HE-Meta: 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 SVDMHc/1 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Later commits will cause objtool to warn about static calls being used in .noinstr sections in order to safely defer instruction patching IPIs targeted at NOHZ_FULL CPUs. pv_sched_clock is updated in: o __init vmware_paravirt_ops_setup() o __init xen_init_time_common() o kvm_sched_clock_init() <- __init kvmclock_init() o hv_setup_sched_clock() <- __init hv_init_tsc_clocksource() IOW purely init context, and can thus be marked as __ro_after_init. Reported-by: Josh Poimboeuf Signed-off-by: Valentin Schneider --- arch/x86/kernel/paravirt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index ab3e172dcc693..34b6fa3fcc045 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -69,7 +69,7 @@ static u64 native_steal_clock(int cpu) } DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock); -DEFINE_STATIC_CALL(pv_sched_clock, native_sched_clock); +DEFINE_STATIC_CALL_RO(pv_sched_clock, native_sched_clock); void paravirt_set_sched_clock(u64 (*func)(void)) { -- 2.51.0