* [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning
@ 2021-03-22 10:52 Arnd Bergmann
2021-03-22 10:53 ` [PATCH 2/2] vgaarb: avoid -Wempty-body warnings Arnd Bergmann
2021-03-22 15:05 ` [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning Geert Uytterhoeven
0 siblings, 2 replies; 4+ messages in thread
From: Arnd Bergmann @ 2021-03-22 10:52 UTC (permalink / raw)
To: dri-devel; +Cc: linux-fbdev, Arnd Bergmann, linux-omap, linux-kernel
From: Arnd Bergmann <arnd@arndb.de>
Building with 'make W=1' shows a few harmless warnings:
drivers/video/fbdev/omap2/omapfb/omapfb-main.c: In function 'omapfb_calc_addr':
drivers/video/fbdev/omap2/omapfb/omapfb-main.c:823:56: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
823 | var->xoffset, var->yoffset, offset);
| ^
drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c: In function 'omapfb_ioctl':
drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c:911:45: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
911 | DBG("ioctl failed: %d\n", r);
Avoid these by using no_printk(), which adds format string checking as
well.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/video/fbdev/omap2/omapfb/omapfb.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb.h b/drivers/video/fbdev/omap2/omapfb/omapfb.h
index d27abccb37bc..1c1b5201c8b6 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb.h
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb.h
@@ -29,7 +29,7 @@ extern bool omapfb_debug;
printk(KERN_DEBUG "OMAPFB: " format, ## __VA_ARGS__); \
} while (0)
#else
-#define DBG(format, ...)
+#define DBG(format, ...) no_printk(format, ## __VA_ARGS__)
#endif
#define FB2OFB(fb_info) ((struct omapfb_info *)(fb_info->par))
--
2.29.2
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] vgaarb: avoid -Wempty-body warnings
2021-03-22 10:52 [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning Arnd Bergmann
@ 2021-03-22 10:53 ` Arnd Bergmann
2021-03-22 13:59 ` Daniel Vetter
2021-03-22 15:05 ` [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning Geert Uytterhoeven
1 sibling, 1 reply; 4+ messages in thread
From: Arnd Bergmann @ 2021-03-22 10:53 UTC (permalink / raw)
To: dri-devel, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann,
David Airlie, Daniel Vetter
Cc: linux-fbdev, Arnd Bergmann, Yue Zou, linux-kernel
From: Arnd Bergmann <arnd@arndb.de>
Building with W=1 shows a few warnings for an empty macro:
drivers/gpu/drm/qxl/qxl_drv.c: In function 'qxl_pci_probe':
drivers/gpu/drm/qxl/qxl_drv.c:131:50: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
131 | vga_put(pdev, VGA_RSRC_LEGACY_IO);
| ^
drivers/gpu/drm/qxl/qxl_drv.c: In function 'qxl_pci_remove':
drivers/gpu/drm/qxl/qxl_drv.c:159:50: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
159 | vga_put(pdev, VGA_RSRC_LEGACY_IO);
Change this to an inline function to make it more robust and avoid
the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
include/linux/vgaarb.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h
index fc6dfeba04a5..dc6ddce92066 100644
--- a/include/linux/vgaarb.h
+++ b/include/linux/vgaarb.h
@@ -112,7 +112,9 @@ static inline int vga_get_uninterruptible(struct pci_dev *pdev,
#if defined(CONFIG_VGA_ARB)
extern void vga_put(struct pci_dev *pdev, unsigned int rsrc);
#else
-#define vga_put(pdev, rsrc)
+static inline void vga_put(struct pci_dev *pdev, unsigned int rsrc)
+{
+}
#endif
--
2.29.2
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] vgaarb: avoid -Wempty-body warnings
2021-03-22 10:53 ` [PATCH 2/2] vgaarb: avoid -Wempty-body warnings Arnd Bergmann
@ 2021-03-22 13:59 ` Daniel Vetter
0 siblings, 0 replies; 4+ messages in thread
From: Daniel Vetter @ 2021-03-22 13:59 UTC (permalink / raw)
To: Arnd Bergmann
Cc: dri-devel, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann,
David Airlie, Daniel Vetter, linux-fbdev, Arnd Bergmann, Yue Zou,
linux-kernel
On Mon, Mar 22, 2021 at 11:53:00AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> Building with W=1 shows a few warnings for an empty macro:
>
> drivers/gpu/drm/qxl/qxl_drv.c: In function 'qxl_pci_probe':
> drivers/gpu/drm/qxl/qxl_drv.c:131:50: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
> 131 | vga_put(pdev, VGA_RSRC_LEGACY_IO);
> | ^
> drivers/gpu/drm/qxl/qxl_drv.c: In function 'qxl_pci_remove':
> drivers/gpu/drm/qxl/qxl_drv.c:159:50: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
> 159 | vga_put(pdev, VGA_RSRC_LEGACY_IO);
>
> Change this to an inline function to make it more robust and avoid
> the warning.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Both applied to drm-misc-next for 5.13, thanks for your patches.
-Daniel
> ---
> include/linux/vgaarb.h | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h
> index fc6dfeba04a5..dc6ddce92066 100644
> --- a/include/linux/vgaarb.h
> +++ b/include/linux/vgaarb.h
> @@ -112,7 +112,9 @@ static inline int vga_get_uninterruptible(struct pci_dev *pdev,
> #if defined(CONFIG_VGA_ARB)
> extern void vga_put(struct pci_dev *pdev, unsigned int rsrc);
> #else
> -#define vga_put(pdev, rsrc)
> +static inline void vga_put(struct pci_dev *pdev, unsigned int rsrc)
> +{
> +}
> #endif
>
>
> --
> 2.29.2
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning
2021-03-22 10:52 [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning Arnd Bergmann
2021-03-22 10:53 ` [PATCH 2/2] vgaarb: avoid -Wempty-body warnings Arnd Bergmann
@ 2021-03-22 15:05 ` Geert Uytterhoeven
1 sibling, 0 replies; 4+ messages in thread
From: Geert Uytterhoeven @ 2021-03-22 15:05 UTC (permalink / raw)
To: Arnd Bergmann
Cc: DRI Development, Linux Fbdev development list, Arnd Bergmann,
open list:TI ETHERNET SWITCH DRIVER (CPSW),
Linux Kernel Mailing List
On Mon, Mar 22, 2021 at 11:54 AM Arnd Bergmann <arnd@kernel.org> wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> Building with 'make W=1' shows a few harmless warnings:
>
> drivers/video/fbdev/omap2/omapfb/omapfb-main.c: In function 'omapfb_calc_addr':
> drivers/video/fbdev/omap2/omapfb/omapfb-main.c:823:56: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
> 823 | var->xoffset, var->yoffset, offset);
> | ^
> drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c: In function 'omapfb_ioctl':
> drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c:911:45: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
> 911 | DBG("ioctl failed: %d\n", r);
>
> Avoid these by using no_printk(), which adds format string checking as
> well.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-03-22 15:05 ` [PATCH 1/2] fbdev: omapfb: avoid -Wempty-body warning Geert Uytterhoeven
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