From: Alexei Starovoitov Date: Tue, 26 Aug 2025 01:52:17 +0000 (-0700) Subject: Merge branch 'bpf-introduce-and-use-rcu_read_lock_dont_migrate' X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=f4c227cc977f842855ab10de60aa4cd5dd644025;p=users%2Fjedix%2Flinux-maple.git Merge branch 'bpf-introduce-and-use-rcu_read_lock_dont_migrate' Menglong Dong says: ==================== bpf: introduce and use rcu_read_lock_dont_migrate migrate_disable() and rcu_read_lock() are used to together in many case in bpf. However, when PREEMPT_RCU is not enabled, rcu_read_lock() will disable preemption, which indicate migrate_disable(), so we don't need to call it in this case. In this series, we introduce rcu_read_lock_dont_migrate and rcu_read_unlock_migrate, which will call migrate_disable and migrate_enable only when PREEMPT_RCU enabled. And use rcu_read_lock_dont_migrate in bpf subsystem. Changes since V2: * make rcu_read_lock_dont_migrate() more compatible by using IS_ENABLED() Changes since V1: * introduce rcu_read_lock_dont_migrate() instead of rcu_migrate_disable() + rcu_read_lock() ==================== Link: https://patch.msgid.link/20250821090609.42508-1-dongml2@chinatelecom.cn Signed-off-by: Alexei Starovoitov --- f4c227cc977f842855ab10de60aa4cd5dd644025