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ktrace: Add __ktrace_used

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This suppresses warnings about write-only variables when the KTRACE
option is disabled, akin __diagused and __witness_used.

MFC after:	1 week

(cherry picked from commit cce4979133ba540ca2dfd57631c6f91673b9bafd)
This commit is contained in:
Mark Johnston 2024-03-09 00:08:43 -05:00
parent 10f08c01de
commit ad9aa06859
1 changed files with 2 additions and 0 deletions
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2
sys/sys/ktrace.h
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@ -336,8 +336,10 @@ void ktrcapfail(enum ktr_cap_fail_type, const cap_rights_t *,
extern u_int ktr_geniosize;
#ifdef KTRACE
extern int ktr_filesize_limit_signal;
#define __ktrace_used
#else
#define ktr_filesize_limit_signal 0
#define __ktrace_used __unused
#endif
#else