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perf.17705
perf-regs-make-perf_reg_name-return-unknown-ins...
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File perf-regs-make-perf_reg_name-return-unknown-instead-of-null.patch of Package perf.17705
From: Arnaldo Carvalho de Melo <acme@redhat.com> Date: Wed, 27 Nov 2019 10:13:34 -0300 Subject: perf regs: Make perf_reg_name() return "unknown" instead of NULL Git-commit: 5b596e0ff0e1852197d4c82d3314db5e43126bf7 Patch-mainline: v5.5-rc1 References: git-fixes To avoid breaking the build on arches where this is not wired up, at least all the other features should be made available and when using this specific routine, the "unknown" should point the user/developer to the need to wire this up on this particular hardware architecture. Detected in a container mipsel debian cross build environment, where it shows up as: In file included from /usr/mipsel-linux-gnu/include/stdio.h:867, from /git/linux/tools/perf/lib/include/perf/cpumap.h:6, from util/session.c:13: In function 'printf', inlined from 'regs_dump__printf' at util/session.c:1103:3, inlined from 'regs__printf' at util/session.c:1131:2: /usr/mipsel-linux-gnu/include/bits/stdio2.h:107:10: error: '%-5s' directive argument is null [-Werror=format-overflow=] 107 | return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ()); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cross compiler details: mipsel-linux-gnu-gcc (Debian 9.2.1-8) 9.2.1 20190909 Also on mips64: In file included from /usr/mips64-linux-gnuabi64/include/stdio.h:867, from /git/linux/tools/perf/lib/include/perf/cpumap.h:6, from util/session.c:13: In function 'printf', inlined from 'regs_dump__printf' at util/session.c:1103:3, inlined from 'regs__printf' at util/session.c:1131:2, inlined from 'regs_user__printf' at util/session.c:1139:3, inlined from 'dump_sample' at util/session.c:1246:3, inlined from 'machines__deliver_event' at util/session.c:1421:3: /usr/mips64-linux-gnuabi64/include/bits/stdio2.h:107:10: error: '%-5s' directive argument is null [-Werror=format-overflow=] 107 | return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ()); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'printf', inlined from 'regs_dump__printf' at util/session.c:1103:3, inlined from 'regs__printf' at util/session.c:1131:2, inlined from 'regs_intr__printf' at util/session.c:1147:3, inlined from 'dump_sample' at util/session.c:1249:3, inlined from 'machines__deliver_event' at util/session.c:1421:3: /usr/mips64-linux-gnuabi64/include/bits/stdio2.h:107:10: error: '%-5s' directive argument is null [-Werror=format-overflow=] 107 | return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ()); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cross compiler details: mips64-linux-gnuabi64-gcc (Debian 9.2.1-8) 9.2.1 20190909 Fixes: 2bcd355b71da ("perf tools: Add interface to arch registers sets") Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-95wjyv4o65nuaeweq31t7l1s@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Tony Jones <tonyj@suse.de> --- tools/perf/util/perf_regs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h index e014c2c038f4..a45499126184 100644 --- a/tools/perf/util/perf_regs.h +++ b/tools/perf/util/perf_regs.h @@ -41,7 +41,7 @@ int perf_reg_value(u64 *valp, struct regs_dump *regs, int id); static inline const char *perf_reg_name(int id __maybe_unused) { - return NULL; + return "unknown"; } static inline int perf_reg_value(u64 *valp __maybe_unused,
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