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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 Tony Hutter
parent d8a97a7be2
commit 143476ce8d
36 changed files with 87 additions and 39 deletions
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lib/libspl/include/sys/feature_tests.h
+10 -1
View File
@@ -27,6 +27,15 @@
#ifndef _SYS_FEATURE_TESTS_H
#define _SYS_FEATURE_TESTS_H
#define __NORETURN __attribute__((__noreturn__))
#define ____cacheline_aligned
#define __NORETURN __attribute__((__noreturn__))
#if !defined(fallthrough)
#if defined(HAVE_IMPLICIT_FALLTHROUGH)
#define fallthrough __attribute__((__fallthrough__))
#else
#define fallthrough ((void)0)
#endif
#endif
#endif