kbuild: add syscall table generation to scripts/Makefile.asm-headers

There are 11 copies of arch/*/kernel/syscalls/Makefile that all implement
the same basic logic in a somewhat awkward way.

I tried out various ways of unifying the existing copies and ended up
with something that hooks into the logic for generating the redirections
to asm-generic headers. This gives a nicer syntax of being able to list
the generated files in $(syscall-y) inside of arch/*/include/asm/Kbuild
instead of both $(generated-y) in that place and also in another
Makefile.

The configuration for which syscall.tbl file to use and which ABIs to
enable is now done in arch/*/kernel/Makefile.syscalls. I have done
patches for all architectures and made sure that the new generic
rules implement a superset of all the architecture specific corner
cases.

ince the header file is not specific to asm-generic/*.h redirects
now, I ended up renaming the file to scripts/Makefile.asm-headers.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 58 deletions

diff --git a/scripts/Makefile.asm-generic b/scripts/Makefile.asm-generic
deleted file mode 100644
index 69434908930e..000000000000
--- a/scripts/Makefile.asm-generic
+++ /dev/null
@@ -1,58 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-# include/asm-generic contains a lot of files that are used
-# verbatim by several architectures.
-#
-# This Makefile reads the file arch/$(SRCARCH)/include/(uapi/)/asm/Kbuild
-# and for each file listed in this file with generic-y creates
-# a small wrapper file in arch/$(SRCARCH)/include/generated/(uapi/)/asm.
-
-PHONY := all
-all:
-
-src := $(srctree)/$(subst /generated,,$(obj))
-
-include $(srctree)/scripts/Kbuild.include
--include $(kbuild-file)
-
-# $(generic)/Kbuild lists mandatory-y. Exclude um since it is a special case.
-ifneq ($(SRCARCH),um)
-include $(srctree)/$(generic)/Kbuild
-endif
-
-redundant := $(filter $(mandatory-y) $(generated-y), $(generic-y))
-redundant += $(foreach f, $(generic-y), $(if $(wildcard $(src)/$(f)),$(f)))
-redundant := $(sort $(redundant))
-$(if $(redundant),\
-	$(warning redundant generic-y found in $(src)/Kbuild: $(redundant)))
-
-# If arch does not implement mandatory headers, fallback to asm-generic ones.
-mandatory-y := $(filter-out $(generated-y), $(mandatory-y))
-generic-y   += $(foreach f, $(mandatory-y), $(if $(wildcard $(src)/$(f)),,$(f)))
-
-generic-y   := $(addprefix $(obj)/, $(generic-y))
-generated-y := $(addprefix $(obj)/, $(generated-y))
-
-# Remove stale wrappers when the corresponding files are removed from generic-y
-old-headers := $(wildcard $(obj)/*.h)
-unwanted    := $(filter-out $(generic-y) $(generated-y),$(old-headers))
-
-quiet_cmd_wrap = WRAP    $@
-      cmd_wrap = echo "\#include <asm-generic/$*.h>" > $@
-
-quiet_cmd_remove = REMOVE  $(unwanted)
-      cmd_remove = rm -f $(unwanted)
-
-all: $(generic-y)
-	$(if $(unwanted),$(call cmd,remove))
-	@:
-
-$(obj)/%.h: $(srctree)/$(generic)/%.h
-	$(call cmd,wrap)
-
-# Create output directory. Skip it if at least one old header exists
-# since we know the output directory already exists.
-ifeq ($(old-headers),)
-$(shell mkdir -p $(obj))
-endif
-
-.PHONY: $(PHONY)