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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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include/os/freebsd/linux/compiler.h
+1
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@@ -67,6 +67,7 @@
#define __always_inline inline
#define noinline __noinline
#define ____cacheline_aligned __aligned(CACHE_LINE_SIZE)
#define fallthrough __attribute__((__fallthrough__))
#if !defined(_KERNEL) && !defined(_STANDALONE)
#define likely(x) __builtin_expect(!!(x), 1)