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/sh/util clean up Build files. Tidy up the
EM_NONE cases for sh in dwarf-regs.c.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/arch/sh/Build             |  1 -
 tools/perf/arch/sh/util/Build        |  1 -
 tools/perf/arch/sh/util/dwarf-regs.c | 41 ----------------------------
 tools/perf/util/dwarf-regs.c         |  4 +--
 tools/perf/util/include/dwarf-regs.h |  2 +-
 5 files changed, 3 insertions(+), 46 deletions(-)
 delete mode 100644 tools/perf/arch/sh/Build
 delete mode 100644 tools/perf/arch/sh/util/Build
 delete mode 100644 tools/perf/arch/sh/util/dwarf-regs.c

diff --git a/tools/perf/arch/sh/Build b/tools/perf/arch/sh/Build
deleted file mode 100644
index e63eabc2c8f4..000000000000
--- a/tools/perf/arch/sh/Build
+++ /dev/null
@@ -1 +0,0 @@
-perf-util-y += util/
diff --git a/tools/perf/arch/sh/util/Build b/tools/perf/arch/sh/util/Build
deleted file mode 100644
index 2337a0b710a2..000000000000
--- a/tools/perf/arch/sh/util/Build
+++ /dev/null
@@ -1 +0,0 @@
-perf-util-$(CONFIG_LIBDW) += dwarf-regs.o
diff --git a/tools/perf/arch/sh/util/dwarf-regs.c b/tools/perf/arch/sh/util/dwarf-regs.c
deleted file mode 100644
index 4b17fc86c73b..000000000000
--- a/tools/perf/arch/sh/util/dwarf-regs.c
+++ /dev/null
@@ -1,41 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Mapping of DWARF debug register numbers into register names.
- *
- * Copyright (C) 2010 Matt Fleming <matt@console-pimps.org>
- */
-
-#include <stddef.h>
-#include <dwarf-regs.h>
-
-/*
- * Generic dwarf analysis helpers
- */
-
-#define SH_MAX_REGS 18
-const char *sh_regs_table[SH_MAX_REGS] = {
-	"r0",
-	"r1",
-	"r2",
-	"r3",
-	"r4",
-	"r5",
-	"r6",
-	"r7",
-	"r8",
-	"r9",
-	"r10",
-	"r11",
-	"r12",
-	"r13",
-	"r14",
-	"r15",
-	"pc",
-	"pr",
-};
-
-/* Return architecture dependent register string (for kprobe-tracer) */
-const char *get_arch_regstr(unsigned int n)
-{
-	return (n < SH_MAX_REGS) ? sh_regs_table[n] : NULL;
-}
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 1649fc07f4f5..944ff4ef0290 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -34,7 +34,7 @@ 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_PPC64 || EM_HOST == EM_RISCV || EM_HOST == EM_S390 || EM_HOST == EM_SH
 	if (machine == EM_NONE) {
 		/* Generic arch - use host arch */
 		machine = EM_HOST;
@@ -43,7 +43,7 @@ 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_PPC64 && EM_HOST != EM_RISCV && EM_HOST != EM_S390 && EM_HOST != EM_SH
 	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 25f3d6b90f10..2b212ed70a15 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -81,7 +81,7 @@
 #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(__powerpc64__) && !defined(__riscv__) && !defined(__s390x__) && !defined(__sh__)
 const char *get_arch_regstr(unsigned int n);
 #endif
 
-- 
2.47.0.105.g07ac214952-goog