From aeb709c767aeca996e6011133e4f7bdb2a4af652 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Wed, 30 Sep 2026 09:59:20 +0000 Subject: selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first free_bulk() starts RCU tasks trace GP and the rest of the elements are freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and waiting_for_gp_ttrace lists are empty. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- include/asm-generic/mcs_spinlock.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 include/asm-generic/mcs_spinlock.h (limited to 'include/asm-generic/mcs_spinlock.h') diff --git a/include/asm-generic/mcs_spinlock.h b/include/asm-generic/mcs_spinlock.h new file mode 100644 index 000000000..39c94012b --- /dev/null +++ b/include/asm-generic/mcs_spinlock.h @@ -0,0 +1,19 @@ +#ifndef __ASM_MCS_SPINLOCK_H +#define __ASM_MCS_SPINLOCK_H + +struct mcs_spinlock { + struct mcs_spinlock *next; + int locked; /* 1 if lock acquired */ + int count; /* nesting count, see qspinlock.c */ +}; + +/* + * Architectures can define their own: + * + * arch_mcs_spin_lock_contended(l) + * arch_mcs_spin_unlock_contended(l) + * + * See kernel/locking/mcs_spinlock.c. + */ + +#endif /* __ASM_MCS_SPINLOCK_H */ -- cgit v1.3.1