From nobody Fri Dec 19 12:29:56 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F40FF21D58F for ; Sat, 12 Apr 2025 21:03:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744491823; cv=none; b=sC0WUgSaMKfidxQOytG0qNpXTbEJJPvka3Uy2j8XX5ycrTCf8brdFBADELuwWucIBjNKkYjZ3cYAttG/8uqrsbMbGt9upNJMH4+YFzvSXkBtRNbff4C2YFYZxeQlPoisx2Rv32l4DSpqmh84UcFMJPJsDA9+Jf8YhswwmB1TgN0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744491823; c=relaxed/simple; bh=Ck57P88/cufB2DmsK9iWuM8HKUfwVvvEim98nv6CAqk=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=B+//k5AcNbYaWMA4CvNdFKGmbJmpc1KR5gkWnd38ZqJSsrYgLn8WMdpSEBYcneomCoHRWfTcmDq4FsOfrqKqCbMBQfrvcm/WGDI8+/rgWJEVPlQeyHJuLPE1fIjYbIXjcmOds/MuQSb+cxX06N1pE4PRA8VtGS97e7oUyig2240= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A151C4CEE5; Sat, 12 Apr 2025 21:03:42 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.98) (envelope-from ) id 1u3i2I-0000000AEDO-1r4L; Sat, 12 Apr 2025 17:05:10 -0400 Message-ID: <20250412210510.290174642@goodmis.org> User-Agent: quilt/0.68 Date: Sat, 12 Apr 2025 17:04:47 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Guenter Roeck Subject: [for-linus][PATCH 1/7] tracing: Hide get_vm_area() from MMUless builds References: <20250412210446.338481957@goodmis.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Steven Rostedt The function get_vm_area() is not defined for non-MMU builds and causes a build error if it is used. Hide the map_pages() function around a: #ifdef CONFIG_MMU to keep it from being compiled when CONFIG_MMU is not set. Cc: Masami Hiramatsu Cc: Mathieu Desnoyers Link: https://lore.kernel.org/20250407120111.2ccc9319@gandalf.local.home Reported-by: Guenter Roeck Tested-by: Guenter Roeck Closes: https://lore.kernel.org/all/4f8ece8b-8862-4f7c-8ede-febd28f8a9fe@ro= eck-us.net/ Fixes: 394f3f02de531 ("tracing: Use vmap_page_range() to map memmap ring bu= ffer") Signed-off-by: Steven Rostedt (Google) --- kernel/trace/trace.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index b581e388a9d9..8ddf6b17215c 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -9806,6 +9806,7 @@ static int instance_mkdir(const char *name) return ret; } =20 +#ifdef CONFIG_MMU static u64 map_pages(unsigned long start, unsigned long size) { unsigned long vmap_start, vmap_end; @@ -9828,6 +9829,12 @@ static u64 map_pages(unsigned long start, unsigned l= ong size) =20 return (u64)vmap_start; } +#else +static inline u64 map_pages(unsigned long start, unsigned long size) +{ + return 0; +} +#endif =20 /** * trace_array_get_by_name - Create/Lookup a trace array, given its name. --=20 2.47.2