The file just provides the function get_arch_regstr, however, if in
the only caller get_dwarf_regstr EM_HOST is used for the EM_NONE case
the function can never be called. So remove as dead code. As this is
the only file in the arch/sparc/util clean up Build files. Tidy up the
EM_NONE cases for sparc in dwarf-regs.c.

Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/arch/sparc/Build             |  1 -
 tools/perf/arch/sparc/util/Build        |  1 -
 tools/perf/arch/sparc/util/dwarf-regs.c | 39 -------------------------
 tools/perf/util/dwarf-regs.c            |  6 ++--
 tools/perf/util/include/dwarf-regs.h    |  3 +-
 5 files changed, 6 insertions(+), 44 deletions(-)
 delete mode 100644 tools/perf/arch/sparc/Build
 delete mode 100644 tools/perf/arch/sparc/util/Build
 delete mode 100644 tools/perf/arch/sparc/util/dwarf-regs.c

diff --git a/tools/perf/arch/sparc/Build b/tools/perf/arch/sparc/Build
deleted file mode 100644
index e63eabc2c8f4..000000000000
--- a/tools/perf/arch/sparc/Build
+++ /dev/null
@@ -1 +0,0 @@
-perf-util-y += util/
diff --git a/tools/perf/arch/sparc/util/Build b/tools/perf/arch/sparc/util/Build
deleted file mode 100644
index 2337a0b710a2..000000000000
--- a/tools/perf/arch/sparc/util/Build
+++ /dev/null
@@ -1 +0,0 @@
-perf-util-$(CONFIG_LIBDW) += dwarf-regs.o
diff --git a/tools/perf/arch/sparc/util/dwarf-regs.c b/tools/perf/arch/sparc/util/dwarf-regs.c
deleted file mode 100644
index 1282cb2dc7bd..000000000000
--- a/tools/perf/arch/sparc/util/dwarf-regs.c
+++ /dev/null
@@ -1,39 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Mapping of DWARF debug register numbers into register names.
- *
- * Copyright (C) 2010 David S. Miller <davem@davemloft.net>
- */
-
-#include <stddef.h>
-#include <dwarf-regs.h>
-
-#define SPARC_MAX_REGS	96
-
-const char *sparc_regs_table[SPARC_MAX_REGS] = {
-	"%g0", "%g1", "%g2", "%g3", "%g4", "%g5", "%g6", "%g7",
-	"%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%sp", "%o7",
-	"%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", "%l7",
-	"%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%fp", "%i7",
-	"%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7",
-	"%f8", "%f9", "%f10", "%f11", "%f12", "%f13", "%f14", "%f15",
-	"%f16", "%f17", "%f18", "%f19", "%f20", "%f21", "%f22", "%f23",
-	"%f24", "%f25", "%f26", "%f27", "%f28", "%f29", "%f30", "%f31",
-	"%f32", "%f33", "%f34", "%f35", "%f36", "%f37", "%f38", "%f39",
-	"%f40", "%f41", "%f42", "%f43", "%f44", "%f45", "%f46", "%f47",
-	"%f48", "%f49", "%f50", "%f51", "%f52", "%f53", "%f54", "%f55",
-	"%f56", "%f57", "%f58", "%f59", "%f60", "%f61", "%f62", "%f63",
-};
-
-/**
- * get_arch_regstr() - lookup register name from it's DWARF register number
- * @n:	the DWARF register number
- *
- * get_arch_regstr() returns the name of the register in struct
- * regdwarfnum_table from it's DWARF register number. If the register is not
- * found in the table, this returns NULL;
- */
-const char *get_arch_regstr(unsigned int n)
-{
-	return (n < SPARC_MAX_REGS) ? sparc_regs_table[n] : NULL;
-}
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 944ff4ef0290..a0bcc2529cb0 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -34,7 +34,8 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int
 {
 #if EM_HOST == EM_X86_64 || EM_HOST == EM_386 || EM_HOST == EM_AARCH64 || EM_HOST == EM_ARM \
     || EM_HOST == EM_CSKY || EM_HOST == EM_LOONGARCH || EM_HOST == EM_MIPS || EM_HOST == EM_PPC \
-    || EM_HOST == EM_PPC64 || EM_HOST == EM_RISCV || EM_HOST == EM_S390 || EM_HOST == EM_SH
+    || EM_HOST == EM_PPC64 || EM_HOST == EM_RISCV || EM_HOST == EM_S390 || EM_HOST == EM_SH \
+    || EM_HOST == EM_SPARC || EM_HOST == EM_SPARCV9
 	if (machine == EM_NONE) {
 		/* Generic arch - use host arch */
 		machine = EM_HOST;
@@ -43,7 +44,8 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int
 	switch (machine) {
 #if EM_HOST != EM_X86_64 && EM_HOST != EM_386 && EM_HOST != EM_AARCH64 && EM_HOST != EM_ARM \
     && EM_HOST != EM_CSKY && EM_HOST != EM_LOONGARCH && EM_HOST != EM_MIPS && EM_HOST != EM_PPC \
-    && EM_HOST != EM_PPC64 && EM_HOST != EM_RISCV && EM_HOST != EM_S390 && EM_HOST != EM_SH
+    && EM_HOST != EM_PPC64 && EM_HOST != EM_RISCV && EM_HOST != EM_S390 && EM_HOST != EM_SH \
+    && EM_HOST != EM_SPARC && EM_HOST != EM_SPARCV9
 	case EM_NONE:	/* Generic arch - use host arch */
 		return get_arch_regstr(n);
 #endif
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h
index 7026a3d2aaa7..cb632d1f46f3 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -91,7 +91,8 @@
 #ifdef HAVE_LIBDW_SUPPORT
 #if !defined(__x86_64__) && !defined(__i386__) && !defined(__aarch64__) && !defined(__arm__) \
     && !defined(__loongarch__) && !defined(__mips__) && !defined(__powerpc__) \
-    && !defined(__powerpc64__) && !defined(__riscv__) && !defined(__s390x__) && !defined(__sh__)
+    && !defined(__powerpc64__) && !defined(__riscv__) && !defined(__s390x__) && !defined(__sh__) \
+    && !defined(__sparc64__) && !defined(__sparc__)
 const char *get_arch_regstr(unsigned int n);
 #endif
 
-- 
2.47.0.277.g8800431eea-goog