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btrfs-progs: mark BUG() as unreachable

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Marking BUG() unreachable helps us silence unnecessary warnings e.g.
"warning: control reaches end of non-void function [-Wreturn-type]" like
the code below.

   int foo()
   {
   ...
   	if (XXX)
   		return 0;
	else if (YYY)
		return 1;
   	else
   		BUG();
   }

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2021-04-01 17:41:00 +09:00 committed by David Sterba
parent 4a9b83c7a4
commit c6b585034f
1 changed files with 5 additions and 1 deletions
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6
kerncompat.h
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@ -333,7 +333,11 @@ static inline void assert_trace(const char *assertion, const char *filename,
#endif
#define BUG_ON(c) bugon_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
#define BUG() BUG_ON(1)
#define BUG() \
do { \
BUG_ON(1); \
__builtin_unreachable(); \
} while (0)
#define WARN_ON(c) warning_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
#define container_of(ptr, type, member) ({ \