linux-kernel - [trivial PATCH] um virtio: Neaten vu

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Date:   Sat, 11 Apr 2020 09:28:08 -0700
From:   Joe Perches <joe@...ches.com>
To:     Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>
Cc:     Erel Geron <erelx.geron@...el.com>, linux-um@...ts.infradead.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [trivial PATCH] um virtio: Neaten vu_err macro definition

Defining a macro with ... and __VA_ARGS__ (without ##) can cause
compilation errors if a macro use does not have additional args.

Add ## to __VA_ARGS__ in the macro definition.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 arch/um/drivers/virtio_uml.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c
index be54d3..351aee5 100644
--- a/arch/um/drivers/virtio_uml.c
+++ b/arch/um/drivers/virtio_uml.c
@@ -74,7 +74,7 @@ struct virtio_uml_vq_info {
 
 extern unsigned long long physmem_size, highmem;
 
-#define vu_err(vu_dev, ...)	dev_err(&(vu_dev)->pdev->dev, __VA_ARGS__)
+#define vu_err(vu_dev, ...)	dev_err(&(vu_dev)->pdev->dev, ##__VA_ARGS__)
 
 /* Vhost-user protocol */