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Use fallthrough macro

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As of the Linux 5.9 kernel a fallthrough macro has been added which
should be used to anotate all intentional fallthrough paths.  Once
all of the kernel code paths have been updated to use fallthrough
the -Wimplicit-fallthrough option will because the default.  To
avoid warnings in the OpenZFS code base when this happens apply
the fallthrough macro.

Additional reading: https://lwn.net/Articles/794944/

Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #12441
This commit is contained in:
Brian Behlendorf
2021-09-14 09:17:54 -07:00
committed by GitHub
parent 7443299fe0
commit 6954c22f35
37 changed files with 88 additions and 40 deletions
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config/Rules.am
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@@ -26,6 +26,7 @@ AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -std=gnu99 -Wall -Wstrict-prototypes -Wmissing-prototypes
AM_CFLAGS += -fno-strict-aliasing
AM_CFLAGS += $(NO_OMIT_FRAME_POINTER)
AM_CFLAGS += $(IMPLICIT_FALLTHROUGH)
AM_CFLAGS += $(DEBUG_CFLAGS)
AM_CFLAGS += $(ASAN_CFLAGS)
AM_CFLAGS += $(CODE_COVERAGE_CFLAGS) $(NO_FORMAT_ZERO_LENGTH)