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authorSean Paul <seanpaul@chromium.org>2019-10-23 11:14:11 -0400
committerSean Paul <seanpaul@chromium.org>2019-10-23 11:14:11 -0400
commit44bf67f32a6803339ac1ba721b158c3e2272cabe (patch)
tree1ed93503a4a1d20005b85df91bd81e5f5982f348 /include/linux/compiler_attributes.h
parenta96bf3cbd7b8557f5c5c7938e5f8926ea39d55e9 (diff)
parent2e79e22e092acd55da0b2db066e4826d7d152c41 (diff)
downloadtalos-op-linux-44bf67f32a6803339ac1ba721b158c3e2272cabe.tar.gz
talos-op-linux-44bf67f32a6803339ac1ba721b158c3e2272cabe.zip
Merge drm/drm-next into drm-misc-next
Parroting Daniel's backmerge justification from 2e79e22e092acd55da0b2db066e4826d7d152c41: Thierry needs fd70c7755bf0 ("drm/bridge: tc358767: fix max_tu_symbol value") to be able to merge his dp_link patch series. Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'include/linux/compiler_attributes.h')
-rw-r--r--include/linux/compiler_attributes.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h
index 6b318efd8a74..cdf016596659 100644
--- a/include/linux/compiler_attributes.h
+++ b/include/linux/compiler_attributes.h
@@ -40,6 +40,7 @@
# define __GCC4_has_attribute___noclone__ 1
# define __GCC4_has_attribute___nonstring__ 0
# define __GCC4_has_attribute___no_sanitize_address__ (__GNUC_MINOR__ >= 8)
+# define __GCC4_has_attribute___fallthrough__ 0
#endif
/*
@@ -186,6 +187,22 @@
#endif
/*
+ * Add the pseudo keyword 'fallthrough' so case statement blocks
+ * must end with any of these keywords:
+ * break;
+ * fallthrough;
+ * goto <label>;
+ * return [expression];
+ *
+ * gcc: https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html#Statement-Attributes
+ */
+#if __has_attribute(__fallthrough__)
+# define fallthrough __attribute__((__fallthrough__))
+#else
+# define fallthrough do {} while (0) /* fallthrough */
+#endif
+
+/*
* Note the missing underscores.
*
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute
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