linux-kernel - [PATCH 5.10 33/41] tools/resolve_btfids: Check objects before removing

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Date:   Fri,  9 Apr 2021 11:53:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 33/41] tools/resolve_btfids: Check objects before removing

From: Jiri Olsa <jolsa@...nel.org>

[ Upstream commit f23130979c2f15ea29a431cd9e1ea7916337bbd4 ]

We want this clean to be called from tree's root clean
and that one is silent if there's nothing to clean.

Adding check for all object to clean and display CLEAN
messages only if there are objects to remove.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
Acked-by: Andrii Nakryiko <andrii@...nel.org>
Link: https://lore.kernel.org/bpf/20210205124020.683286-3-jolsa@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/bpf/resolve_btfids/Makefile | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/tools/bpf/resolve_btfids/Makefile b/tools/bpf/resolve_btfids/Makefile
index 1d46a247ec95..be09ec4f03ff 100644
--- a/tools/bpf/resolve_btfids/Makefile
+++ b/tools/bpf/resolve_btfids/Makefile
@@ -64,13 +64,20 @@ $(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
 	$(call msg,LINK,$@)
 	$(Q)$(CC) $(BINARY_IN) $(LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
 
+clean_objects := $(wildcard $(OUTPUT)/*.o                \
+                            $(OUTPUT)/.*.o.cmd           \
+                            $(OUTPUT)/.*.o.d             \
+                            $(OUTPUT)/libbpf             \
+                            $(OUTPUT)/libsubcmd          \
+                            $(OUTPUT)/resolve_btfids)
+
+ifneq ($(clean_objects),)
 clean: fixdep-clean
 	$(call msg,CLEAN,$(BINARY))
-	$(Q)$(RM) -f $(BINARY); \
-	$(RM) -rf $(if $(OUTPUT),$(OUTPUT),.)/feature; \
-	$(RM) -rf $(OUTPUT)/libbpf; \
-	$(RM) -rf $(OUTPUT)/libsubcmd; \
-	find $(if $(OUTPUT),$(OUTPUT),.) -name \*.o -or -name \*.o.cmd -or -name \*.o.d | xargs $(RM)
+	$(Q)$(RM) -rf $(clean_objects)
+else
+clean:
+endif
 
 tags:
 	$(call msg,GEN,,tags)
-- 
2.30.2