From: Jiri Olsa Date: Thu, 12 Mar 2026 12:37:38 +0000 (+0100) Subject: ftrace: Use hash argument for tmp_ops in update_ftrace_direct_mod X-Git-Tag: ceph-for-7.1-rc1~143^2 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=50b35c9e50a865600344ab1d8f9a8b3384d7e63d;p=ceph-client.git ftrace: Use hash argument for tmp_ops in update_ftrace_direct_mod The modify logic registers temporary ftrace_ops object (tmp_ops) to trigger the slow path for all direct callers to be able to safely modify attached addresses. At the moment we use ops->func_hash for tmp_ops filter, which represents all the systems attachments. It's faster to use just the passed hash filter, which contains only the modified sites and is always a subset of the ops->func_hash. Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Cc: Menglong Dong Cc: Song Liu Link: https://patch.msgid.link/20260312123738.129926-1-jolsa@kernel.org Fixes: e93672f770d7 ("ftrace: Add update_ftrace_direct_mod function") Signed-off-by: Jiri Olsa Signed-off-by: Steven Rostedt (Google) --- diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 8df69e702706..413310912609 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -6606,9 +6606,9 @@ int update_ftrace_direct_mod(struct ftrace_ops *ops, struct ftrace_hash *hash, b if (!orig_hash) goto unlock; - /* Enable the tmp_ops to have the same functions as the direct ops */ + /* Enable the tmp_ops to have the same functions as the hash object. */ ftrace_ops_init(&tmp_ops); - tmp_ops.func_hash = ops->func_hash; + tmp_ops.func_hash->filter_hash = hash; err = register_ftrace_function_nolock(&tmp_ops); if (err)