[PATCH 3/4] nsdeps: remove stale .ns_deps files before generating new ones

[Jessica Yu]

When adding or removing namespaces, calling `make` does not necessarily
remove existing stale .ns_deps files. That is, one could remove a
namespace, call make, and while modpost writes the correct, new .ns_deps
files, stale ones are not removed from the source tree, thus producing
incorrect results when running `make nsdeps`, i.e., inserting
MODULE_IMPORT_NS() statements for namespaces that have been removed.
Clean up old .ns_deps files before generating new ones with modpost.

Signed-off-by: Jessica Yu <jeyu@xxxxxxxxxx>
---
 Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Makefile b/Makefile
index ffd7a912fc46..22f9894b346b 100644
--- a/Makefile
+++ b/Makefile
@@ -1685,6 +1685,8 @@ tags TAGS cscope gtags: FORCE
 PHONY += nsdeps
 
 nsdeps: modules
+	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
+		-name '*.ns_deps' -type f -print | xargs rm -f
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
 
-- 
2.16.4