From d40d48e1f1f25abe755521e33a67f5d2b8b9443c Mon Sep 17 00:00:00 2001
From: Daniel Bristot de Oliveira <bristot@kernel.org>
Date: Fri, 10 Dec 2021 19:11:27 +0100
Subject: rtla: Add Documentation

Adds the basis for rtla documentation. This patch also
includes the rtla(1) man page.

As suggested by Jonathan Corbet, we are placing these man
pages at Documentation/tools/rtla, using rst format. It
is not linked to the official documentation, though.

The Makefile is based on bpftool's Documentation one.

Link: https://lkml.kernel.org/r/5f510f3e962fc0cd531c43f5a815544dd720c3f2.1639158831.git.bristot@kernel.org

Cc: Tao Zhou <tao.zhou@linux.dev>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: linux-rt-users@vger.kernel.org
Cc: linux-trace-devel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Suggested-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 tools/tracing/rtla/Makefile | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

(limited to 'tools')

diff --git a/tools/tracing/rtla/Makefile b/tools/tracing/rtla/Makefile
index 7a7348faec32..2d52ff0bff7d 100644
--- a/tools/tracing/rtla/Makefile
+++ b/tools/tracing/rtla/Makefile
@@ -45,18 +45,28 @@ DATADIR	:=	/usr/share
 DOCDIR	:=	$(DATADIR)/doc
 MANDIR	:=	$(DATADIR)/man
 LICDIR	:=	$(DATADIR)/licenses
+SRCTREE	:=	$(if $(BUILD_SRC),$(BUILD_SRC),$(CURDIR))
+
+# If running from the tarball, man pages are stored in the Documentation
+# dir. If running from the kernel source, man pages are stored in
+# Documentation/tools/rtla/.
+ifneq ($(wildcard Documentation/.*),)
+DOCSRC	=	Documentation/
+else
+DOCSRC	=	$(SRCTREE)/../../../Documentation/tools/rtla/
+endif
 
 .PHONY:	all
 all:	rtla
 
-rtla: $(OBJ)
+rtla: $(OBJ) doc
 	$(CC) -o rtla $(LDFLAGS) $(OBJ) $(LIBS)
 
 static: $(OBJ)
 	$(CC) -o rtla-static $(LDFLAGS) --static $(OBJ) $(LIBS) -lpthread -ldl
 
 .PHONY: install
-install:
+install: doc_install
 	$(INSTALL) -d -m 755 $(DESTDIR)$(BINDIR)
 	$(INSTALL) rtla -m 755 $(DESTDIR)$(BINDIR)
 	$(STRIP) $(DESTDIR)$(BINDIR)/rtla
@@ -66,15 +76,27 @@ install:
 	ln -s $(DESTDIR)$(BINDIR)/rtla $(DESTDIR)$(BINDIR)/timerlat
 
 .PHONY: clean tarball
-clean:
+clean: doc_clean
 	@test ! -f rtla || rm rtla
 	@test ! -f rtla-static || rm rtla-static
 	@test ! -f src/rtla.o || rm src/rtla.o
 	@test ! -f $(TARBALL) || rm -f $(TARBALL)
 	@rm -rf *~ $(OBJ) *.tar.$(CEXT)
 
-tarball:  clean
+tarball: clean
 	rm -rf $(NAME)-$(VERSION) && mkdir $(NAME)-$(VERSION)
 	cp -r $(DIRS) $(FILES) $(NAME)-$(VERSION)
+	mkdir $(NAME)-$(VERSION)/Documentation/
+	cp -rp $(SRCTREE)/../../../Documentation/tools/rtla/* $(NAME)-$(VERSION)/Documentation/
 	tar $(TAROPTS) --exclude='*~' $(NAME)-$(VERSION)
 	rm -rf $(NAME)-$(VERSION)
+
+.PHONY: doc doc_clean doc_install
+doc:
+	$(MAKE) -C $(DOCSRC)
+
+doc_clean:
+	$(MAKE) -C $(DOCSRC) clean
+
+doc_install:
+	$(MAKE) -C $(DOCSRC) install
-- 
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