1 files changed, 6 insertions, 5 deletions

diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
index 25f216a841d5..477d137c0557 100644
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -14,7 +14,7 @@ kbuild-file := $(srctree)/$(obj)/Kbuild
 include $(kbuild-file)
 
 # called may set destination dir (when installing to asm/)
-_dst := $(or $(destination-y),$(dst),$(obj))
+_dst := $(if $(destination-y),$(destination-y),$(if $(dst),$(dst),$(obj)))
 
 old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
 ifneq ($(wildcard $(old-kbuild-file)),)
@@ -48,13 +48,14 @@ all-files     := $(header-y) $(genhdr-y) $(wrapper-files)
 output-files  := $(addprefix $(installdir)/, $(all-files))
 
 input-files   := $(foreach hdr, $(header-y), \
-                   $(or \
+                   $(if $(wildcard $(srcdir)/$(hdr)), \
                         $(wildcard $(srcdir)/$(hdr)), \
-                        $(wildcard $(oldsrcdir)/$(hdr)), \
-                        $(error Missing UAPI file $(srcdir)/$(hdr)) \
+                        $(if $(wildcard $(oldsrcdir)/$(hdr)), \
+                                $(wildcard $(oldsrcdir)/$(hdr)), \
+                                $(error Missing UAPI file $(srcdir)/$(hdr))) \
                    )) \
                  $(foreach hdr, $(genhdr-y), \
-                   $(or \
+                   $(if $(wildcard $(gendir)/$(hdr)), \
                         $(wildcard $(gendir)/$(hdr)), \
                         $(error Missing generated UAPI file $(gendir)/$(hdr)) \
                    ))