From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
To: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
dri-devel@lists.freedesktop.org
Cc: Sascha Hauer <s.hauer@pengutronix.de>,
Jyri Sarha <jyri.sarha@iki.fi>,
Jonathan Hunter <jonathanh@nvidia.com>,
linux-renesas-soc@vger.kernel.org,
Thierry Reding <thierry.reding@gmail.com>,
linux-imx@nxp.com, Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>,
linux-tegra@vger.kernel.org, Shawn Guo <shawnguo@kernel.org>
Subject: Re: [PATCH 1/7] drm/omap: Cast pointer to integer safely
Date: Thu, 29 Jul 2021 09:13:17 +0300 [thread overview]
Message-ID: <69ac4474-3bbf-db72-3777-74c59f947d42@ideasonboard.com> (raw)
In-Reply-To: <20210728153736.15240-2-laurent.pinchart+renesas@ideasonboard.com>
On 28/07/2021 18:37, Laurent Pinchart wrote:
> On 64-bit platforms, the compiler complains that casting a void pointer
> to an unsigned int loses data. Cast the pointer to a uintptr_t unsigned
> to fix this.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
> drivers/gpu/drm/omapdrm/omap_drv.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index f86e20578143..c05d3975cb31 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -572,7 +572,7 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
> priv->dss->mgr_ops_priv = priv;
>
> soc = soc_device_match(omapdrm_soc_devices);
> - priv->omaprev = soc ? (unsigned int)soc->data : 0;
> + priv->omaprev = soc ? (uintptr_t)soc->data : 0;
> priv->wq = alloc_ordered_workqueue("omapdrm", 0);
>
> mutex_init(&priv->list_lock);
>
Looks fine, although the subject sounds odd. Why was the cast "unsafe" before, and "safe" now?
There's also another bunch of warnings I see:
drivers/gpu/drm/omapdrm/dss/dsi.c: In function ‘dsi_vc_send_long’:
drivers/gpu/drm/omapdrm/dss/dsi.c:7:25: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘size_t’ {aka ‘const long unsigned int’} [-Wformat=]
7 | #define DSS_SUBSYS_NAME "DSI"
| ^~~~~
drivers/gpu/drm/omapdrm/dss/dss.h:30:21: note: in expansion of macro ‘DSS_SUBSYS_NAME’
30 | #define pr_fmt(fmt) DSS_SUBSYS_NAME ": " fmt
| ^~~~~~~~~~~~~~~
./include/linux/dynamic_debug.h:134:15: note: in expansion of macro ‘pr_fmt’
134 | func(&id, ##__VA_ARGS__); \
| ^~~~~~~~~~~
./include/linux/dynamic_debug.h:152:2: note: in expansion of macro ‘__dynamic_func_call’
152 | __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~
./include/linux/dynamic_debug.h:162:2: note: in expansion of macro ‘_dynamic_func_call’
162 | _dynamic_func_call(fmt, __dynamic_pr_debug, \
| ^~~~~~~~~~~~~~~~~~
./include/linux/printk.h:471:2: note: in expansion of macro ‘dynamic_pr_debug’
471 | dynamic_pr_debug(fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~
drivers/gpu/drm/omapdrm/dss/dss.h:36:2: note: in expansion of macro ‘pr_debug’
36 | pr_debug(format, ## __VA_ARGS__)
| ^~~~~~~~
drivers/gpu/drm/omapdrm/dss/dsi.c:2097:3: note: in expansion of macro ‘DSSDBG’
2097 | DSSDBG("dsi_vc_send_long, %d bytes\n", msg->tx_len);
| ^~~~~~
In file included from ./include/linux/printk.h:7,
from ./include/linux/kernel.h:19,
from drivers/gpu/drm/omapdrm/dss/dsi.c:9:
drivers/gpu/drm/omapdrm/dss/dsi.c: In function ‘dsi_vc_generic_read’:
./include/linux/kern_levels.h:5:18: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘size_t’ {aka ‘const long unsigned int’} [-Wformat=]
5 | #define KERN_SOH "\001" /* ASCII Start Of Header */
| ^~~~~~
./include/linux/kern_levels.h:11:18: note: in expansion of macro ‘KERN_SOH’
11 | #define KERN_ERR KERN_SOH "3" /* error conditions */
| ^~~~~~~~
./include/linux/printk.h:390:9: note: in expansion of macro ‘KERN_ERR’
390 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~~~
drivers/gpu/drm/omapdrm/dss/dss.h:40:2: note: in expansion of macro ‘pr_err’
40 | pr_err("omapdss " DSS_SUBSYS_NAME " error: " format, ##__VA_ARGS__)
| ^~~~~~
drivers/gpu/drm/omapdrm/dss/dsi.c:2393:2: note: in expansion of macro ‘DSSERR’
2393 | DSSERR("%s(vc %d, reqlen %d) failed\n", __func__, vc, msg->tx_len);
| ^~~~~~
Tomi
next prev parent reply other threads:[~2021-07-29 6:22 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 15:37 [PATCH 0/7] drm: Extend COMPILE_TEST support to some ARM drivers Laurent Pinchart
2021-07-28 15:37 ` [PATCH 1/7] drm/omap: Cast pointer to integer safely Laurent Pinchart
2021-07-29 6:13 ` Tomi Valkeinen [this message]
2021-07-31 0:25 ` Laurent Pinchart
2021-07-28 15:37 ` [PATCH 2/7] drm/sti: Use correct printk format specifiers for size_t Laurent Pinchart
2021-07-30 9:35 ` Philippe CORNU
2021-07-28 15:37 ` [PATCH 3/7] drm/imx/dcss: Enable COMPILE_TEST on all ARM64 platforms Laurent Pinchart
2021-07-30 12:10 ` Geert Uytterhoeven
2021-07-30 12:31 ` Philipp Zabel
2021-07-28 15:37 ` [PATCH 4/7] drm/omap: Enable COMPILE_TEST on all ARM and " Laurent Pinchart
2021-07-31 1:24 ` kernel test robot
2021-07-28 15:37 ` [PATCH 5/7] drm/sti: " Laurent Pinchart
2021-07-30 9:39 ` Philippe CORNU
2021-07-28 15:37 ` [PATCH 6/7] drm/tegra: Enable COMPILE_TEST on all " Laurent Pinchart
2021-07-28 15:37 ` [PATCH 7/7] drm/tilcdc: " Laurent Pinchart
2021-07-29 6:19 ` [PATCH 0/7] drm: Extend COMPILE_TEST support to some ARM drivers Tomi Valkeinen
2021-07-29 16:53 ` Sam Ravnborg
2021-07-30 19:33 ` Laurent Pinchart
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