radix tree test suite: Depend on Makefile and quieten grep

Changing the CFLAGS in the Makefile didn't always lead to a
recompilation because the OFILES didn't depend on the Makefile.
Also, after doing make clean, grep would still complain about
a missing map-shift.h; we need -s as well as -q.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/testing/radix-tree/Makefile b/tools/testing/radix-tree/Makefile
index 022488f50fc6..4c6289c5d415 100644
--- a/tools/testing/radix-tree/Makefile
+++ b/tools/testing/radix-tree/Makefile
@@ -28,7 +28,7 @@ clean:
 
 vpath %.c ../../lib
 
-$(OFILES): *.h */*.h generated/map-shift.h \
+$(OFILES): Makefile *.h */*.h generated/map-shift.h \
         ../../include/linux/*.h \
         ../../include/asm/*.h \
         ../../../include/linux/radix-tree.h \
@@ -43,7 +43,7 @@ idr.c: ../../../lib/idr.c
 .PHONY: mapshift
 
 mapshift:
-        @if ! grep -qw $(SHIFT) generated/map-shift.h; then             \
+        @if ! grep -qws $(SHIFT) generated/map-shift.h; then            \
                 echo "#define RADIX_TREE_MAP_SHIFT $(SHIFT)" >          \
                                 generated/map-shift.h;                  \
         fi