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Peter Anvin" , x86@kernel.org, Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Mathieu Desnoyers , David Hildenbrand , Jonathan Corbet , Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-doc@vger.kernel.org, Jinchao Wang Subject: [RFC PATCH 07/13] stacktrace: export stack_trace_save_regs() Date: Wed, 15 Jul 2026 02:31:46 +0800 Message-ID: <20260714183146.12598-1-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260714182243.10687-1-wangjinchao600@gmail.com> References: <20260714182243.10687-1-wangjinchao600@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The other stack_trace_save_*() flavours are exported, but the regs variant is not, so no module can capture a stack trace for a given pt_regs. KWatch, which may be built as a module, uses it to record who wrote to a watched address from the hardware breakpoint handler. Export it like its siblings. Signed-off-by: Jinchao Wang --- kernel/stacktrace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c index afb3c116da91..d853c40f916b 100644 --- a/kernel/stacktrace.c +++ b/kernel/stacktrace.c @@ -175,6 +175,7 @@ unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store, arch_stack_walk(consume_entry, &c, current, regs); return c.len; } +EXPORT_SYMBOL_GPL(stack_trace_save_regs); #ifdef CONFIG_HAVE_RELIABLE_STACKTRACE /** @@ -325,6 +326,7 @@ unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store, save_stack_trace_regs(regs, &trace); return trace.nr_entries; } +EXPORT_SYMBOL_GPL(stack_trace_save_regs); #ifdef CONFIG_HAVE_RELIABLE_STACKTRACE /** -- 2.53.0