* [PATCH 1/2] drm/i915: Disable -Woverride-init
@ 2017-10-13 16:08 Chris Wilson
2017-10-13 16:08 ` [PATCH 2/2] drm/i915: Add -Wunused-const-variable to our build Chris Wilson
` (3 more replies)
0 siblings, 4 replies; 11+ messages in thread
From: Chris Wilson @ 2017-10-13 16:08 UTC (permalink / raw)
To: intel-gfx; +Cc: Joonas, Jani Nikula, Daniel Vetter, Tomi Sarvela
We commonly use an inheritance style approach to device parameters,
where later generations inherit the defaults from earlier generations
and then override settings that change. For example, in i915_pci.c
BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
contexts and then individual Broadwell stanzas make further adjustments
for different GT configs.
This causes a lot of warnings with make W=1 from -Woverride-init. We
could use
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Woverride-init"
...
#pragma GCC diagnostic pop
around the offenders, but the pattern is used frequently enough in the
driver to prefer just disabling the warning entirely.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
---
drivers/gpu/drm/i915/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 66d23b619db1..0bb6e423ecd7 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -2,7 +2,8 @@
# Makefile for the drm device driver. This driver provides support for the
# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
-subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
+subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
+subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
subdir-ccflags-y += \
$(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
--
2.15.0.rc0
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH 2/2] drm/i915: Add -Wunused-const-variable to our build
2017-10-13 16:08 [PATCH 1/2] drm/i915: Disable -Woverride-init Chris Wilson
@ 2017-10-13 16:08 ` Chris Wilson
2017-10-13 16:48 ` Ville Syrjälä
2017-10-13 16:18 ` [PATCH 1/2] drm/i915: Disable -Woverride-init Michal Wajdeczko
` (2 subsequent siblings)
3 siblings, 1 reply; 11+ messages in thread
From: Chris Wilson @ 2017-10-13 16:08 UTC (permalink / raw)
To: intel-gfx
Recently this warning caught a regression that had been lurking for 6
months, so it seems to be justified!
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 0bb6e423ecd7..4351b7b6f09b 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -3,6 +3,7 @@
# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
+subdir-ccflags-y += -Wunused-const-variable
subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
subdir-ccflags-y += \
$(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
--
2.15.0.rc0
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 11+ messages in thread* Re: [PATCH 2/2] drm/i915: Add -Wunused-const-variable to our build
2017-10-13 16:08 ` [PATCH 2/2] drm/i915: Add -Wunused-const-variable to our build Chris Wilson
@ 2017-10-13 16:48 ` Ville Syrjälä
0 siblings, 0 replies; 11+ messages in thread
From: Ville Syrjälä @ 2017-10-13 16:48 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx
On Fri, Oct 13, 2017 at 05:08:30PM +0100, Chris Wilson wrote:
> Recently this warning caught a regression that had been lurking for 6
> months, so it seems to be justified!
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
> drivers/gpu/drm/i915/Makefile | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 0bb6e423ecd7..4351b7b6f09b 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -3,6 +3,7 @@
> # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
>
> subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
> +subdir-ccflags-y += -Wunused-const-variable
My gcc 5.4 doesn't even seem to have this one :(
> subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
> subdir-ccflags-y += \
> $(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
> --
> 2.15.0.rc0
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] drm/i915: Disable -Woverride-init
2017-10-13 16:08 [PATCH 1/2] drm/i915: Disable -Woverride-init Chris Wilson
2017-10-13 16:08 ` [PATCH 2/2] drm/i915: Add -Wunused-const-variable to our build Chris Wilson
@ 2017-10-13 16:18 ` Michal Wajdeczko
2017-10-13 16:47 ` Ville Syrjälä
2017-10-13 17:45 ` ✗ Fi.CI.BAT: failure for series starting with [1/2] " Patchwork
3 siblings, 0 replies; 11+ messages in thread
From: Michal Wajdeczko @ 2017-10-13 16:18 UTC (permalink / raw)
To: intel-gfx, Chris Wilson; +Cc: Jani Nikula, Daniel Vetter, Joonas, Tomi Sarvela
On Fri, 13 Oct 2017 18:08:29 +0200, Chris Wilson
<chris@chris-wilson.co.uk> wrote:
> We commonly use an inheritance style approach to device parameters,
> where later generations inherit the defaults from earlier generations
> and then override settings that change. For example, in i915_pci.c
> BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
> contexts and then individual Broadwell stanzas make further adjustments
> for different GT configs.
>
> This causes a lot of warnings with make W=1 from -Woverride-init. We
> could use
> #pragma GCC diagnostic push
> #pragma GCC diagnostic ignored "-Woverride-init"
> ...
> #pragma GCC diagnostic pop
> around the offenders, but the pattern is used frequently enough in the
> driver to prefer just disabling the warning entirely.
I'm not sure that disabling any warnings globally is a good idea.
What about disabling them just for this single file that uses poor
man's "inheritance"
CFLAGS_i915_pci.o := -Wno-override-init
Michal
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
> Cc: Jani Nikula <jani.nikula@intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
> ---
> drivers/gpu/drm/i915/Makefile | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/Makefile
> b/drivers/gpu/drm/i915/Makefile
> index 66d23b619db1..0bb6e423ecd7 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -2,7 +2,8 @@
> # Makefile for the drm device driver. This driver provides support for
> the
> # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
> -subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
> +subdir-ccflags-y := -Wno-override-init # used frequently for
> "inheritance"
> +subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
> subdir-ccflags-y += \
> $(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] drm/i915: Disable -Woverride-init
2017-10-13 16:08 [PATCH 1/2] drm/i915: Disable -Woverride-init Chris Wilson
2017-10-13 16:08 ` [PATCH 2/2] drm/i915: Add -Wunused-const-variable to our build Chris Wilson
2017-10-13 16:18 ` [PATCH 1/2] drm/i915: Disable -Woverride-init Michal Wajdeczko
@ 2017-10-13 16:47 ` Ville Syrjälä
2017-10-13 19:34 ` Chris Wilson
2017-10-13 17:45 ` ✗ Fi.CI.BAT: failure for series starting with [1/2] " Patchwork
3 siblings, 1 reply; 11+ messages in thread
From: Ville Syrjälä @ 2017-10-13 16:47 UTC (permalink / raw)
To: Chris Wilson; +Cc: Jani Nikula, Daniel Vetter, intel-gfx, Joonas, Tomi Sarvela
On Fri, Oct 13, 2017 at 05:08:29PM +0100, Chris Wilson wrote:
> We commonly use an inheritance style approach to device parameters,
> where later generations inherit the defaults from earlier generations
> and then override settings that change. For example, in i915_pci.c
> BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
> contexts and then individual Broadwell stanzas make further adjustments
> for different GT configs.
>
> This causes a lot of warnings with make W=1 from -Woverride-init. We
> could use
> #pragma GCC diagnostic push
> #pragma GCC diagnostic ignored "-Woverride-init"
> ...
> #pragma GCC diagnostic pop
> around the offenders, but the pattern is used frequently enough in the
> driver to prefer just disabling the warning entirely.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
> Cc: Jani Nikula <jani.nikula@intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
> ---
> drivers/gpu/drm/i915/Makefile | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 66d23b619db1..0bb6e423ecd7 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -2,7 +2,8 @@
> # Makefile for the drm device driver. This driver provides support for the
> # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
>
> -subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
> +subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
This doesn't seem to override what W=n does so not sure why we'd need it
here, unless we add more warning flags ourselves. Or does you gcc spew
these without W=1?
Looks like I can can actually do
subdir-ccflags-y := -Wall -Wextra -Wno-unused-parameter -Wno-type-limits
-Wno-missing-field-initializers -Wno-override-init
without any warnings with gcc 5.4.
-Wunused-but-set-variable reveals some more (noticed those when I ran
with W=1). Most look like easy to silence. The atomic interator macros
seem to trigger this all the time however, which may not be so easy to
sort out. Not sure.
> +subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
> subdir-ccflags-y += \
> $(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
>
> --
> 2.15.0.rc0
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] drm/i915: Disable -Woverride-init
2017-10-13 16:47 ` Ville Syrjälä
@ 2017-10-13 19:34 ` Chris Wilson
0 siblings, 0 replies; 11+ messages in thread
From: Chris Wilson @ 2017-10-13 19:34 UTC (permalink / raw)
To: Ville Syrjälä
Cc: Jani Nikula, Daniel Vetter, intel-gfx, Joonas, Tomi Sarvela
Quoting Ville Syrjälä (2017-10-13 17:47:25)
> On Fri, Oct 13, 2017 at 05:08:29PM +0100, Chris Wilson wrote:
> > We commonly use an inheritance style approach to device parameters,
> > where later generations inherit the defaults from earlier generations
> > and then override settings that change. For example, in i915_pci.c
> > BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
> > contexts and then individual Broadwell stanzas make further adjustments
> > for different GT configs.
> >
> > This causes a lot of warnings with make W=1 from -Woverride-init. We
> > could use
> > #pragma GCC diagnostic push
> > #pragma GCC diagnostic ignored "-Woverride-init"
> > ...
> > #pragma GCC diagnostic pop
> > around the offenders, but the pattern is used frequently enough in the
> > driver to prefer just disabling the warning entirely.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
> > Cc: Jani Nikula <jani.nikula@intel.com>
> > Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> > Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
> > ---
> > drivers/gpu/drm/i915/Makefile | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> > index 66d23b619db1..0bb6e423ecd7 100644
> > --- a/drivers/gpu/drm/i915/Makefile
> > +++ b/drivers/gpu/drm/i915/Makefile
> > @@ -2,7 +2,8 @@
> > # Makefile for the drm device driver. This driver provides support for the
> > # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
> >
> > -subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
> > +subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
>
> This doesn't seem to override what W=n does so not sure why we'd need it
> here, unless we add more warning flags ourselves. Or does you gcc spew
> these without W=1?
It's for the majority of the noise in W=1.
-Chris
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 11+ messages in thread
* ✗ Fi.CI.BAT: failure for series starting with [1/2] drm/i915: Disable -Woverride-init
2017-10-13 16:08 [PATCH 1/2] drm/i915: Disable -Woverride-init Chris Wilson
` (2 preceding siblings ...)
2017-10-13 16:47 ` Ville Syrjälä
@ 2017-10-13 17:45 ` Patchwork
3 siblings, 0 replies; 11+ messages in thread
From: Patchwork @ 2017-10-13 17:45 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx
== Series Details ==
Series: series starting with [1/2] drm/i915: Disable -Woverride-init
URL : https://patchwork.freedesktop.org/series/31942/
State : failure
== Summary ==
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
CHK include/generated/bounds.h
CHK include/generated/timeconst.h
CHK include/generated/asm-offsets.h
CALL scripts/checksyscalls.sh
CHK scripts/mod/devicetable-offsets.h
CHK include/generated/compile.h
CHK kernel/config_data.h
CC [M] drivers/gpu/drm/i915/intel_ddi.o
drivers/gpu/drm/i915/intel_ddi.c:118:35: error: ‘bdw_ddi_translations_fdi’ defined but not used [-Werror=unused-const-variable=]
static const struct ddi_buf_trans bdw_ddi_translations_fdi[] = {
^~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
scripts/Makefile.build:313: recipe for target 'drivers/gpu/drm/i915/intel_ddi.o' failed
make[4]: *** [drivers/gpu/drm/i915/intel_ddi.o] Error 1
scripts/Makefile.build:572: recipe for target 'drivers/gpu/drm/i915' failed
make[3]: *** [drivers/gpu/drm/i915] Error 2
scripts/Makefile.build:572: recipe for target 'drivers/gpu/drm' failed
make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:572: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2
Makefile:1019: recipe for target 'drivers' failed
make: *** [drivers] Error 2
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH 1/2] drm/i915: Disable -Woverride-init
@ 2017-01-18 12:18 Chris Wilson
2017-01-18 15:56 ` Joonas Lahtinen
0 siblings, 1 reply; 11+ messages in thread
From: Chris Wilson @ 2017-01-18 12:18 UTC (permalink / raw)
To: intel-gfx; +Cc: Jani Nikula, Daniel Vetter, Tomi Sarvela
We commonly use an inheritance style approach to device parameters,
where later generations inherit the defaults from earlier generations
and then override settings that change. For example, in i915_pci.c
BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
contexts and then individual Broadwell stanzas make further adjustments
for different GT configs.
This causes a lot of warnings with make W=1 from -Woverride-init. We
could use
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Woverride-init"
...
#pragma GCC diagnostic pop
around the offenders, but the pattern is used frequently enough in the
driver to prefer just disabling the warning entirely.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
---
drivers/gpu/drm/i915/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 91136b425f77..24cc3c7f814d 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -2,7 +2,8 @@
# Makefile for the drm device driver. This driver provides support for the
# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
-subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
+subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
+subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
subdir-ccflags-$(CONFIG_DRM_I915_SELFTEST) += -I$(src) -I$(src)/selftests
subdir-ccflags-y += \
$(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
--
2.11.0
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] drm/i915: Disable -Woverride-init
2017-01-18 12:18 [PATCH 1/2] " Chris Wilson
@ 2017-01-18 15:56 ` Joonas Lahtinen
2017-01-18 16:27 ` Chris Wilson
0 siblings, 1 reply; 11+ messages in thread
From: Joonas Lahtinen @ 2017-01-18 15:56 UTC (permalink / raw)
To: Chris Wilson, intel-gfx; +Cc: Jani Nikula, Daniel Vetter, Tomi Sarvela
On ke, 2017-01-18 at 12:18 +0000, Chris Wilson wrote:
> We commonly use an inheritance style approach to device parameters,
> where later generations inherit the defaults from earlier generations
> and then override settings that change. For example, in i915_pci.c
> BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
> contexts and then individual Broadwell stanzas make further adjustments
> for different GT configs.
>
> This causes a lot of warnings with make W=1 from -Woverride-init. We
> could use
> #pragma GCC diagnostic push
> #pragma GCC diagnostic ignored "-Woverride-init"
> ...
> #pragma GCC diagnostic pop
> around the offenders, but the pattern is used frequently enough in the
> driver to prefer just disabling the warning entirely.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
> Cc: Jani Nikula <jani.nikula@intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
<SNIP>
> -subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
> +subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
Why always on, if somebody upper level decides to -Werror, this is
kinda unexpected for them?
Regards, Joonas
--
Joonas Lahtinen
Open Source Technology Center
Intel Corporation
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] drm/i915: Disable -Woverride-init
2017-01-18 15:56 ` Joonas Lahtinen
@ 2017-01-18 16:27 ` Chris Wilson
2017-01-23 8:00 ` Joonas Lahtinen
0 siblings, 1 reply; 11+ messages in thread
From: Chris Wilson @ 2017-01-18 16:27 UTC (permalink / raw)
To: Joonas Lahtinen; +Cc: Jani Nikula, Daniel Vetter, intel-gfx, Tomi Sarvela
On Wed, Jan 18, 2017 at 05:56:13PM +0200, Joonas Lahtinen wrote:
> On ke, 2017-01-18 at 12:18 +0000, Chris Wilson wrote:
> > We commonly use an inheritance style approach to device parameters,
> > where later generations inherit the defaults from earlier generations
> > and then override settings that change. For example, in i915_pci.c
> > BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
> > contexts and then individual Broadwell stanzas make further adjustments
> > for different GT configs.
> >
> > This causes a lot of warnings with make W=1 from -Woverride-init. We
> > could use
> > #pragma GCC diagnostic push
> > #pragma GCC diagnostic ignored "-Woverride-init"
> > ...
> > #pragma GCC diagnostic pop
> > around the offenders, but the pattern is used frequently enough in the
> > driver to prefer just disabling the warning entirely.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com
> > Cc: Jani Nikula <jani.nikula@intel.com>
> > Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> > Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
>
> <SNIP>
>
> > -subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
> > +subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
>
> Why always on, if somebody upper level decides to -Werror, this is
> kinda unexpected for them?
We intentionally use the { .a = 0, .a = 1 }. That is flagged by the set
of warnings enabled by W=1. If the user is using Werror, then they are
faced with an intentionally broken build.
Our choice, if we want to be W=1 clean, is to either markup using #pragma
or turn off the warning.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [PATCH 1/2] drm/i915: Disable -Woverride-init
2017-01-18 16:27 ` Chris Wilson
@ 2017-01-23 8:00 ` Joonas Lahtinen
0 siblings, 0 replies; 11+ messages in thread
From: Joonas Lahtinen @ 2017-01-23 8:00 UTC (permalink / raw)
To: Chris Wilson; +Cc: Jani Nikula, Daniel Vetter, intel-gfx, Tomi Sarvela
On ke, 2017-01-18 at 16:27 +0000, Chris Wilson wrote:
> On Wed, Jan 18, 2017 at 05:56:13PM +0200, Joonas Lahtinen wrote:
> >
> > On ke, 2017-01-18 at 12:18 +0000, Chris Wilson wrote:
> > >
> > > -subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
> > > +subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
> >
> > Why always on, if somebody upper level decides to -Werror, this is
> > kinda unexpected for them?
>
> We intentionally use the { .a = 0, .a = 1 }. That is flagged by the set
> of warnings enabled by W=1. If the user is using Werror, then they are
> faced with an intentionally broken build.
>
> Our choice, if we want to be W=1 clean, is to either markup using #pragma
> or turn off the warning.
Guess we can then merge this.
Regards, Joonas
--
Joonas Lahtinen
Open Source Technology Center
Intel Corporation
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^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2017-10-13 19:34 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-10-13 16:08 [PATCH 1/2] drm/i915: Disable -Woverride-init Chris Wilson
2017-10-13 16:08 ` [PATCH 2/2] drm/i915: Add -Wunused-const-variable to our build Chris Wilson
2017-10-13 16:48 ` Ville Syrjälä
2017-10-13 16:18 ` [PATCH 1/2] drm/i915: Disable -Woverride-init Michal Wajdeczko
2017-10-13 16:47 ` Ville Syrjälä
2017-10-13 19:34 ` Chris Wilson
2017-10-13 17:45 ` ✗ Fi.CI.BAT: failure for series starting with [1/2] " Patchwork
-- strict thread matches above, loose matches on Subject: below --
2017-01-18 12:18 [PATCH 1/2] " Chris Wilson
2017-01-18 15:56 ` Joonas Lahtinen
2017-01-18 16:27 ` Chris Wilson
2017-01-23 8:00 ` Joonas Lahtinen
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