linux-kernel - [PATCH] ring-buffer: Have parameter to virt_addr

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Message-ID: <20250308123649.1330e9ca@batman.local.home>
Date: Sat, 8 Mar 2025 12:36:49 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>, Linux trace kernel
 <linux-trace-kernel@...r.kernel.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers
 <mathieu.desnoyers@...icios.com>
Subject: [PATCH] ring-buffer: Have parameter to virt_addr_valid() cast to
 pointer

From: Steven Rostedt <rostedt@...dmis.org>

Some architectures expect the parameter passed to virt_addr_valid() to be
a pointer. Cast the unsigned long parameter to a void pointer.

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202503090029.zj0DretW-lkp@intel.com/
Fixes: 10a299da2c2b9 ("ring-buffer: Allow persistent ring buffers to be mmapped")
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 kernel/trace/ring_buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 649724efd1be..94be81edffd2 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -7134,7 +7134,7 @@ static int __rb_map_vma(struct ring_buffer_per_cpu *cpu_buffer,
 			goto out;
 		}
 
-		if (virt_addr_valid(cpu_buffer->subbuf_ids[s]))
+		if (virt_addr_valid((void *)cpu_buffer->subbuf_ids[s]))
 			page = virt_to_page((void *)cpu_buffer->subbuf_ids[s]);
 		else
 			page = vmalloc_to_page((void *)cpu_buffer->subbuf_ids[s]);
-- 
2.47.2