diff --git a/sys/compat/linuxkpi/common/include/linux/seq_buf.h b/sys/compat/linuxkpi/common/include/linux/seq_buf.h
new file mode 100644
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/seq_buf.h
@@ -0,0 +1,67 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025-2026 The FreeBSD Foundation
+ * Copyright (c) 2025-2026 Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
+ *
+ * This software was developed by Jean-Sébastien Pédron under sponsorship
+ * from the FreeBSD Foundation.
+ */
+
+#ifndef _LINUXKPI_LINUX_SEQ_BUF_H_
+#define	_LINUXKPI_LINUX_SEQ_BUF_H_
+
+#include <linux/bug.h>
+#include <linux/minmax.h>
+#include <linux/seq_file.h>
+#include <linux/types.h>
+
+struct seq_buf {
+	char	*buffer;
+	size_t	 size;
+	size_t	 len;
+};
+
+#define DECLARE_SEQ_BUF(NAME, SIZE)			\
+	struct seq_buf NAME = {				\
+		.buffer = (char[SIZE]) { 0 },		\
+		.size = SIZE,				\
+	}
+
+static inline void
+seq_buf_clear(struct seq_buf *s)
+{
+	s->len = 0;
+	if (s->size > 0)
+		s->buffer[0] = '\0';
+}
+
+static inline bool
+seq_buf_has_overflowed(struct seq_buf *s)
+{
+	return (s->len > s->size);
+}
+
+static inline bool
+seq_buf_buffer_left(struct seq_buf *s)
+{
+	if (seq_buf_has_overflowed(s))
+		return (0);
+
+	return (s->size - s->len);
+}
+
+#define	seq_buf_init(s, buf, size) lkpi_seq_buf_init((s), (buf), (size))
+void lkpi_seq_buf_init(struct seq_buf *s, char *buf, unsigned int size);
+
+#define	seq_buf_printf(s, f, ...) lkpi_seq_buf_printf((s), (f), __VA_ARGS__)
+int lkpi_seq_buf_printf(struct seq_buf *s, const char *fmt, ...) \
+    __printflike(2, 3);
+
+#define	seq_buf_vprintf(s, f, a) lkpi_seq_buf_vprintf((s), (f), (a))
+int lkpi_seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args);
+
+#define	seq_buf_str(s) lkpi_seq_buf_str((s))
+const char * lkpi_seq_buf_str(struct seq_buf *s);
+
+#endif
diff --git a/sys/compat/linuxkpi/common/src/linux_seq_buf.c b/sys/compat/linuxkpi/common/src/linux_seq_buf.c
new file mode 100644
--- /dev/null
+++ b/sys/compat/linuxkpi/common/src/linux_seq_buf.c
@@ -0,0 +1,59 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025-2026 The FreeBSD Foundation
+ * Copyright (c) 2025-2026 Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
+ *
+ * This software was developed by Jean-Sébastien Pédron under sponsorship
+ * from the FreeBSD Foundation.
+ */
+
+#include <linux/seq_buf.h>
+ 
+void
+lkpi_seq_buf_init(struct seq_buf *s, char *buf, unsigned int size)
+{
+	s->buffer = buf;
+	s->size = size;
+
+	seq_buf_clear(s);
+}
+ 
+int
+lkpi_seq_buf_printf(struct seq_buf *s, const char *fmt, ...)
+{
+	int ret;
+	va_list args;
+
+	va_start(args, fmt);
+	ret = seq_buf_vprintf(s, fmt, args);
+	va_end(args);
+
+	return (ret);
+}
+ 
+int
+lkpi_seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args)
+{
+	int ret;
+
+	ret = vsnprintf(s->buffer, s->size, fmt, args);
+	if (ret >= 0)
+		s->len = ret;
+
+	return (ret);
+}
+
+const char *
+lkpi_seq_buf_str(struct seq_buf *s)
+{
+	if (s->size == 0)
+		return ("");
+
+	if (seq_buf_buffer_left(s))
+		s->buffer[s->len] = '\0';
+	else
+		s->buffer[s->size - 1] = '\0';
+
+	return (s->buffer);
+}
diff --git a/sys/conf/files b/sys/conf/files
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -4700,6 +4700,8 @@
 	compile-with "${LINUXKPI_C} -I$S/contrib/ck/include"
 compat/linuxkpi/common/src/linux_schedule.c	optional compat_linuxkpi \
 	compile-with "${LINUXKPI_C}"
+compat/linuxkpi/common/src/linux_seq_buf.c	optional compat_linuxkpi \
+	compile-with "${LINUXKPI_C}"
 compat/linuxkpi/common/src/linux_shmemfs.c	optional compat_linuxkpi \
 	compile-with "${LINUXKPI_C}"
 compat/linuxkpi/common/src/linux_shrinker.c	optional compat_linuxkpi \
diff --git a/sys/modules/linuxkpi/Makefile b/sys/modules/linuxkpi/Makefile
--- a/sys/modules/linuxkpi/Makefile
+++ b/sys/modules/linuxkpi/Makefile
@@ -24,6 +24,7 @@
 	linux_radix.c \
 	linux_rcu.c \
 	linux_schedule.c \
+	linux_seq_buf.c \
 	linux_seq_file.c \
 	linux_shmemfs.c \
 	linux_shrinker.c \