perf xtensa: Remove dwarf-regs.c

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

Reviewed-by: Masami Hiramatsu (Google) <[email protected]>
Signed-off-by: Ian Rogers <[email protected]>
Cc: Anup Patel <[email protected]>
Cc: Yang Jihong <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Shenlin Liang <[email protected]>
Cc: Nick Terrell <[email protected]>
Cc: Guilherme Amadio <[email protected]>
Cc: Steinar H. Gunderson <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: Alexander Lobakin <[email protected]>
Cc: Przemek Kitszel <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: James Clark <[email protected]>
Cc: Mike Leach <[email protected]>
Cc: Chen Pei <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Oliver Upton <[email protected]>
Cc: Aditya Gupta <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Athira Rajeev <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Bibo Mao <[email protected]>
Cc: John Garry <[email protected]>
Cc: Atish Patra <[email protected]>
Cc: Dima Kogan <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Dr. David Alan Gilbert <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

Author: captain5050

tools/perf/arch/xtensa/Build

@@ -35,7 +35,7 @@ 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_SH \
-    || EM_HOST == EM_SPARC || EM_HOST == EM_SPARCV9
+    || EM_HOST == EM_SPARC || EM_HOST == EM_SPARCV9 || EM_HOST == EM_XTENSA
 	if (machine == EM_NONE) {
 		/* Generic arch - use host arch */
 		machine = EM_HOST;
@@ -45,7 +45,7 @@ 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_SH \
-    && EM_HOST != EM_SPARC && EM_HOST != EM_SPARCV9
+    && EM_HOST != EM_SPARC && EM_HOST != EM_SPARCV9 && EM_HOST != EM_XTENSA
 	case EM_NONE:	/* Generic arch - use host arch */
 		return get_arch_regstr(n);
 #endif

tools/perf/arch/xtensa/util/Build

@@ -92,7 +92,7 @@
 #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(__sparc64__) && !defined(__sparc__)
+    && !defined(__sparc64__) && !defined(__sparc__) && !defined(__xtensa__)
 const char *get_arch_regstr(unsigned int n);
 #endif