From: Jiri Olsa <jolsa@kernel.org>
To: Steven Rostedt <rostedt@kernel.org>,
Florent Revest <revest@google.com>,
Mark Rutland <mark.rutland@arm.com>
Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-trace-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Menglong Dong <menglong8.dong@gmail.com>
Subject: [PATCH 5/9] ftrace: Export some of hash related functions
Date: Tue, 23 Sep 2025 23:51:43 +0200 [thread overview]
Message-ID: <20250923215147.1571952-6-jolsa@kernel.org> (raw)
In-Reply-To: <20250923215147.1571952-1-jolsa@kernel.org>
We are going to use these functions in following changes.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
include/linux/ftrace.h | 16 ++++++++++++++++
kernel/trace/ftrace.c | 7 +++----
kernel/trace/trace.h | 8 --------
3 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 1cf6d0bb9a81..a8e351df3a52 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -397,6 +397,22 @@ enum ftrace_ops_cmd {
typedef int (*ftrace_ops_func_t)(struct ftrace_ops *op, enum ftrace_ops_cmd cmd);
#ifdef CONFIG_DYNAMIC_FTRACE
+
+#define FTRACE_HASH_DEFAULT_BITS 10
+
+struct ftrace_hash {
+ unsigned long size_bits;
+ struct hlist_head *buckets;
+ unsigned long count;
+ unsigned long flags;
+ struct rcu_head rcu;
+};
+
+struct ftrace_hash *alloc_ftrace_hash(int size_bits);
+void free_ftrace_hash(struct ftrace_hash *hash);
+struct ftrace_func_entry *add_hash_entry_direct(struct ftrace_hash *hash,
+ unsigned long ip, unsigned long direct);
+
/* The hash used to know what functions callbacks trace */
struct ftrace_ops_hash {
struct ftrace_hash __rcu *notrace_hash;
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 4eb08817e4ee..75bea44e4f8e 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -68,7 +68,6 @@
})
/* hash bits for specific function selection */
-#define FTRACE_HASH_DEFAULT_BITS 10
#define FTRACE_HASH_MAX_BITS 12
#ifdef CONFIG_DYNAMIC_FTRACE
@@ -1185,7 +1184,7 @@ static void __add_hash_entry(struct ftrace_hash *hash,
hash->count++;
}
-static struct ftrace_func_entry *
+struct ftrace_func_entry *
add_hash_entry_direct(struct ftrace_hash *hash, unsigned long ip, unsigned long direct)
{
struct ftrace_func_entry *entry;
@@ -1265,7 +1264,7 @@ static void clear_ftrace_mod_list(struct list_head *head)
mutex_unlock(&ftrace_lock);
}
-static void free_ftrace_hash(struct ftrace_hash *hash)
+void free_ftrace_hash(struct ftrace_hash *hash)
{
if (!hash || hash == EMPTY_HASH)
return;
@@ -1305,7 +1304,7 @@ void ftrace_free_filter(struct ftrace_ops *ops)
}
EXPORT_SYMBOL_GPL(ftrace_free_filter);
-static struct ftrace_hash *alloc_ftrace_hash(int size_bits)
+struct ftrace_hash *alloc_ftrace_hash(int size_bits)
{
struct ftrace_hash *hash;
int size;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 5f4bed5842f9..5070aafa590c 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -899,14 +899,6 @@ enum {
FTRACE_HASH_FL_MOD = (1 << 0),
};
-struct ftrace_hash {
- unsigned long size_bits;
- struct hlist_head *buckets;
- unsigned long count;
- unsigned long flags;
- struct rcu_head rcu;
-};
-
struct ftrace_func_entry *
ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
--
2.51.0
next prev parent reply other threads:[~2025-09-23 21:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-23 21:51 [PATCH 0/9] ftrace,bpf: Use single direct ops for bpf trampolines Jiri Olsa
2025-09-23 21:51 ` [PATCH 1/9] ftrace: Make alloc_and_copy_ftrace_hash direct friendly Jiri Olsa
2025-09-23 21:51 ` [PATCH 2/9] ftrace: Add register_ftrace_direct_hash function Jiri Olsa
2025-09-24 9:04 ` Steven Rostedt
2025-09-24 14:37 ` Jiri Olsa
2025-09-24 15:07 ` Steven Rostedt
2025-09-24 16:00 ` Jiri Olsa
2025-09-23 21:51 ` [PATCH 3/9] ftrace: Add unregister_ftrace_direct_hash function Jiri Olsa
2025-09-23 21:51 ` [PATCH 4/9] ftrace: Add modify_ftrace_direct_hash function Jiri Olsa
2025-09-23 21:51 ` Jiri Olsa [this message]
2025-09-23 21:51 ` [PATCH 6/9] ftrace: Use direct hash interface in direct functions Jiri Olsa
2025-09-23 21:51 ` [PATCH 7/9] bpf: Add trampoline ip hash table Jiri Olsa
2025-09-23 21:51 ` [PATCH 8/9] ftrace: Factor ftrace_ops ops_func interface Jiri Olsa
2025-09-23 21:51 ` [PATCH 9/9] bpf, x86: Use single ftrace_ops for direct calls Jiri Olsa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250923215147.1571952-6-jolsa@kernel.org \
--to=jolsa@kernel.org \
--cc=andrii@kernel.org \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=menglong8.dong@gmail.com \
--cc=revest@google.com \
--cc=rostedt@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).