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* [PATCH v2] drm/i915: Disable -Wuninitialized
@ 2019-01-26  7:11 ` Nathan Chancellor
  0 siblings, 0 replies; 14+ messages in thread
From: Nathan Chancellor @ 2019-01-26  7:11 UTC (permalink / raw)
  To: Jani Nikula, Joonas Lahtinen, Rodrigo Vivi
  Cc: intel-gfx, Nick Desaulniers, linux-kernel, dri-devel,
	Matthias Kaehlcke, Nathan Chancellor

This warning is disabled by default in scripts/Makefile.extrawarn when
W= is not provided but this Makefile adds -Wall after this warning is
disabled so it shows up in the build when it shouldn't:

In file included from drivers/gpu/drm/i915/intel_breadcrumbs.c:895:
drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c:350:34: error:
variable 'wq' is uninitialized when used within its own initialization
[-Werror,-Wuninitialized]
        DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
                                        ^~
./include/linux/wait.h:74:63: note: expanded from macro
'DECLARE_WAIT_QUEUE_HEAD_ONSTACK'
        struct wait_queue_head name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name)
                               ~~~~                                  ^~~~
./include/linux/wait.h:72:33: note: expanded from macro
'__WAIT_QUEUE_HEAD_INIT_ONSTACK'
        ({ init_waitqueue_head(&name); name; })
                                       ^~~~
1 error generated.

Explicitly disable the warning like commit 46e2068081e9 ("drm/i915:
Disable some extra clang warnings").

Link: https://github.com/ClangBuiltLinux/linux/issues/220
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---

v1 -> v2:

* Rather than disable the warning for the problematic folder, disable it
  for the entire folder like Matthias's commit.

 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 8300efe60fe1..210d0e8777b6 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -22,6 +22,7 @@ subdir-ccflags-y += $(call cc-disable-warning, unused-but-set-variable)
 subdir-ccflags-y += $(call cc-disable-warning, sign-compare)
 subdir-ccflags-y += $(call cc-disable-warning, sometimes-uninitialized)
 subdir-ccflags-y += $(call cc-disable-warning, initializer-overrides)
+subdir-ccflags-y += $(call cc-disable-warning, uninitialized)
 subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
 
 # Fine grained warnings disable
-- 
2.20.1

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^ permalink raw reply related	[flat|nested] 14+ messages in thread

end of thread, other threads:[~2019-01-26 17:09 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-01-26  7:11 [PATCH v2] drm/i915: Disable -Wuninitialized Nathan Chancellor
2019-01-26  7:11 ` Nathan Chancellor
2019-01-26  7:17 ` Nathan Chancellor
2019-01-26  7:17   ` Nathan Chancellor
2019-01-26  7:27 ` ✗ Fi.CI.SPARSE: warning for " Patchwork
2019-01-26  7:34 ` [PATCH v2] " Nick Desaulniers
2019-01-26  7:34   ` Nick Desaulniers
2019-01-26  7:35   ` Nick Desaulniers
2019-01-26  7:35     ` Nick Desaulniers
2019-01-26  7:57   ` Nathan Chancellor
2019-01-26  7:57     ` Nathan Chancellor
2019-01-26 17:09     ` Chris Wilson
2019-01-26  7:50 ` ✓ Fi.CI.BAT: success for " Patchwork
2019-01-26  9:21 ` ✓ Fi.CI.IGT: " Patchwork

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