From: Tejun Heo Date: Wed, 24 Jun 2026 22:40:51 +0000 (-1000) Subject: sched_ext: Annotate ksyncs with __rcu in alloc/free_kick_syncs() X-Git-Tag: v7.2-rc4~34^2~10 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=115d1ce989747045bd7745c7ab020982660c7e42;p=thirdparty%2Fkernel%2Flinux.git sched_ext: Annotate ksyncs with __rcu in alloc/free_kick_syncs() scx_kick_syncs is a per-CPU __rcu pointer, so per_cpu_ptr() returns struct scx_kick_syncs __rcu **. alloc_kick_syncs() and free_kick_syncs() stored it in a plain struct scx_kick_syncs **ksyncs, which sparse flags as an __rcu address-space mismatch. Annotate ksyncs to match. Its accesses already go through rcu_*_pointer(). Fixes: 987e00035c0e ("sched_ext: Rename pnt_seq to kick_sync") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202606122315.pbnDHP0n-lkp@intel.com/ Signed-off-by: Tejun Heo --- diff --git a/kernel/sched/ext/ext.c b/kernel/sched/ext/ext.c index 5418e6357249..aecbb021d6d7 100644 --- a/kernel/sched/ext/ext.c +++ b/kernel/sched/ext/ext.c @@ -5687,7 +5687,7 @@ static void free_kick_syncs(void) int cpu; for_each_possible_cpu(cpu) { - struct scx_kick_syncs **ksyncs = per_cpu_ptr(&scx_kick_syncs, cpu); + struct scx_kick_syncs __rcu **ksyncs = per_cpu_ptr(&scx_kick_syncs, cpu); struct scx_kick_syncs *to_free; to_free = rcu_replace_pointer(*ksyncs, NULL, true); @@ -6668,7 +6668,7 @@ static int alloc_kick_syncs(void) * can exceed percpu allocator limits on large machines. */ for_each_possible_cpu(cpu) { - struct scx_kick_syncs **ksyncs = per_cpu_ptr(&scx_kick_syncs, cpu); + struct scx_kick_syncs __rcu **ksyncs = per_cpu_ptr(&scx_kick_syncs, cpu); struct scx_kick_syncs *new_ksyncs; WARN_ON_ONCE(rcu_access_pointer(*ksyncs));