git: 64a790d26480 - main - DTrace: remove sparc64 remnants in non-contrib code

[Ed Maste]

The branch main has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=64a790d264808116469914c19265e905b3929e00

commit 64a790d264808116469914c19265e905b3929e00
Author:     Ed Maste <emaste at FreeBSD.org>
AuthorDate: 2021-03-21 01:19:35 +0000
Commit:     Ed Maste <emaste at FreeBSD.org>
CommitDate: 2021-03-22 13:34:57 +0000

    DTrace: remove sparc64 remnants in non-contrib code
    
    Sponsored by:   The FreeBSD Foundation
---
 sys/cddl/dev/profile/profile.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/sys/cddl/dev/profile/profile.c b/sys/cddl/dev/profile/profile.c
index 4fc9f6f22eef..6074354af18d 100644
--- a/sys/cddl/dev/profile/profile.c
+++ b/sys/cddl/dev/profile/profile.c
@@ -83,15 +83,6 @@
  * appears as its own stack frame.  All of this means that we need to add one
  * frame for amd64, and then take one away for both amd64 and i386.
  *
- * On SPARC, the picture is further complicated because the compiler
- * optimizes away tail-calls -- so the following frames are optimized away:
- *
- * 	profile_fire
- *	cyclic_expire
- *
- * This gives three frames.  However, on DEBUG kernels, the cyclic_expire
- * frame cannot be tail-call eliminated, yielding four frames in this case.
- *
  * All of the above constraints lead to the mess below.  Yes, the profile
  * provider should ideally figure this out on-the-fly by hiting one of its own
  * probes and then walking its own stack trace.  This is complicated, however,
@@ -103,14 +94,6 @@
 #else
 #ifdef __i386
 #define	PROF_ARTIFICIAL_FRAMES	6
-#else
-#ifdef __sparc
-#ifdef DEBUG
-#define	PROF_ARTIFICIAL_FRAMES	4
-#else
-#define	PROF_ARTIFICIAL_FRAMES	3
-#endif
-#endif
 #endif
 #endif