hwpmc: add error for HWPMC_DEBUG without KTR

The option is a no-op otherwise, but this is not necessarily obvious.
Failing the compile gives the user a hint.

Reviewed by:	jkoshy, emaste
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D40544

This commit is contained in:

Mitchell Horne

2023-06-16 13:38:26 -03:00

parent 3977781b98

commit 569f89b2f4

1 changed files with 6 additions and 0 deletions

									
										sys/sys/pmc.h
									
		+6
		
												View File
												
				@@ -1069,6 +1069,12 @@ extern struct pmc_cpu **pmc_pcpu;

				extern struct pmc_driverstats pmc_stats;

				#if	defined(HWPMC_DEBUG)

				/* HWPMC_DEBUG without KTR will compile but is a no-op. */

				#if !defined(KTR) || !defined(KTR_COMPILE) || ((KTR_COMPILE & KTR_SUBSYS) == 0)

				#error "HWPMC_DEBUG requires KTR and KTR_COMPILE=KTR_SUBSYS -- see ktr(4)"

				#endif

				#include <sys/ktr.h>

				#define	__pmcdbg_used		/* unused variable annotation */