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Date: Thu, 14 Mar 2024 15:20:12 -0700
From: Ethan Adams <j.ethan.adams@...il.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Oliver Upton <oliver.upton@...ux.dev>,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ethan Adams <j.ethan.adams@...il.com>,
	Tycho Andersen <tycho@...ho.pizza>
Subject: [PATCH] perf build: fix out of tree build

It seems that a previous modification to sysreg-defs, which corrected
emitting the headaer to the specified output directory, exposed missing
subdir, prefix variables. This breaks out of tree builds of perf as the
file is now built into the output directory, but still tries to descend
into output directory as a subdir.

Fixes: a29ee6aea703 ("perf build: Ensure sysreg-defs Makefile respects output dir")
Tested-by: Tycho Andersen <tycho@...ho.pizza>
Reviewed-by: Tycho Andersen <tycho@...ho.pizza>
Signed-off-by: Ethan Adams <j.ethan.adams@...il.com>
---
 tools/perf/Makefile.perf | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 058c9aecf608..63a8b4be5075 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -436,18 +436,19 @@ SHELL = $(SHELL_PATH)
 
 arm64_gen_sysreg_dir := $(srctree)/tools/arch/arm64/tools
 ifneq ($(OUTPUT),)
-  arm64_gen_sysreg_outdir := $(OUTPUT)
+  arm64_gen_sysreg_outdir := $(abspath $(OUTPUT))
 else
   arm64_gen_sysreg_outdir := $(CURDIR)
 endif
 
 arm64-sysreg-defs: FORCE
-	$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir) O=$(arm64_gen_sysreg_outdir)
+	$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir) O=$(arm64_gen_sysreg_outdir) \
+		prefix= subdir=
 
 arm64-sysreg-defs-clean:
 	$(call QUIET_CLEAN,arm64-sysreg-defs)
 	$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir) O=$(arm64_gen_sysreg_outdir) \
-		clean > /dev/null
+		prefix= subdir= clean > /dev/null
 
 beauty_linux_dir := $(srctree)/tools/perf/trace/beauty/include/linux/
 linux_uapi_dir := $(srctree)/tools/include/uapi/linux

base-commit: e365762bb26770b53d2475852453bed76c0d85f9
-- 
2.43.2


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