From: Song Liu <song@kernel.org>
To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
live-patching@vger.kernel.org
Cc: rostedt@goodmis.org, mhiramat@kernel.org, mark.rutland@arm.com,
kernel-team@meta.com, Song Liu <song@kernel.org>
Subject: [PATCH v2 14/16] kallsyms: Mark the kernel text address checks notrace
Date: Thu, 22 Oct 2026 18:10:47 -0700 [thread overview]
Message-ID: <20261023011049.1164625-15-song@kernel.org> (raw)
In-Reply-To: <20261023011049.1164625-1-song@kernel.org>
Commit c0d80ddab899 ("kernel/extable.c: mark core_kernel_text notrace")
made core_kernel_text() notrace, because the MIPS function graph tracer
calls it and tracing it recursed without bound. core_kernel_text()
calls is_kernel_text() and is_kernel_inittext(), and is_kernel_text()
calls __is_kernel_text(). These are plain inline functions, so an
out-of-line copy of any of them is untraced only because inline implies
notrace.
Mark them notrace explicitly. No functional change.
Assisted-by: Claude:claude-opus-5
Signed-off-by: Song Liu <song@kernel.org>
---
include/asm-generic/sections.h | 4 ++--
include/linux/kallsyms.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 0755bc39b0d8..d478ddc02316 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -193,7 +193,7 @@ static inline bool is_kernel_ro_after_init(unsigned long addr)
*
* Returns: true if the address is located in .init.text, false otherwise.
*/
-static inline bool is_kernel_inittext(unsigned long addr)
+static inline bool notrace is_kernel_inittext(unsigned long addr)
{
return addr >= (unsigned long)_sinittext &&
addr < (unsigned long)_einittext;
@@ -208,7 +208,7 @@ static inline bool is_kernel_inittext(unsigned long addr)
* Returns: true if the address is located in .text, false otherwise.
* Note: an internal helper, only check the range of _stext to _etext.
*/
-static inline bool __is_kernel_text(unsigned long addr)
+static inline bool notrace __is_kernel_text(unsigned long addr)
{
return addr >= (unsigned long)_stext &&
addr < (unsigned long)_etext;
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index d5dd54c53ace..93c830b35aeb 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux/kallsyms.h
@@ -24,7 +24,7 @@
struct cred;
struct module;
-static inline int is_kernel_text(unsigned long addr)
+static inline int notrace is_kernel_text(unsigned long addr)
{
if (__is_kernel_text(addr))
return 1;
--
2.53.0-Meta
next prev parent reply other threads:[~2026-10-23 1:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 1:10 [PATCH v2 00/16] Move notrace from inline to __always_inline Song Liu
2026-10-23 1:10 ` [PATCH v2 01/16] x86/paravirt: Mark native pv_ops helpers notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 02/16] x86: Mark CPU state helpers used by resume and kexec notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 03/16] bpf: Mark bpf_spin_lock helpers notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 04/16] bpf: Mark the BPF trampoline " Song Liu
2026-10-23 1:10 ` [PATCH v2 05/16] bpf: Mark the bpf_mem_alloc fast path " Song Liu
2026-10-23 1:10 ` [PATCH v2 06/16] u64_stats: Mark the update helpers used by BPF notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 07/16] tracepoint: Mark __do_trace_##name() notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 08/16] srcu: Mark the fast notrace read-side helpers notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 09/16] arm64: Mark the preempt count " Song Liu
2026-10-23 1:10 ` [PATCH v2 10/16] powerpc, csky, mips, sh: Mark the accessors behind current notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 11/16] rcu: Mark the Tiny RCU rcu_is_watching() notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 12/16] tracing: Mark the tracing_gen_ctx helpers notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 13/16] ktime: Mark ktime_to_ns() notrace Song Liu
2026-10-23 1:10 ` Song Liu [this message]
2026-10-23 1:10 ` [PATCH v2 15/16] uaccess: Mark pagefault_disable() and pagefault_enable() notrace Song Liu
2026-10-23 1:10 ` [PATCH v2 16/16] compiler_types: Move notrace from inline to __always_inline Song Liu
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