kbuild: do not redirect the first prerequisite for filechk

Currently, filechk unconditionally opens the first prerequisite and
redirects it as the stdin of a filechk_* rule.  Hence, every target
using $(call filechk,...) must list something as the first prerequisite
even if it is unneeded.

'< $<' is actually unneeded in most cases.  Each rule can explicitly
adds it if necessary.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 02bb3163cd8d..7eabe80cb9fb 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -56,7 +56,7 @@ kecho := $($(quiet)kecho)
 define filechk
         $(Q)set -e;                             \
         mkdir -p $(dir $@);                     \
-        $(filechk_$(1)) < $< > $@.tmp;          \
+        $(filechk_$(1)) > $@.tmp;               \
         if [ -r $@ ] && cmp -s $@ $@.tmp; then  \
                 rm -f $@.tmp;                   \
         else                                    \
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index f56bb4b8bc60..df0fff252619 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -415,7 +415,7 @@ define filechk_offsets
          echo " * This file was generated by Kbuild"; \
          echo " */"; \
          echo ""; \
-         sed -ne $(sed-offsets); \
+         sed -ne $(sed-offsets) < $<; \
          echo ""; \
          echo "#endif" )
 endef