Merge branch 'x86-syscall-for-linus' of git://git.kernel.org/pub/scm/…

…linux/kernel/git/tip/tip

* 'x86-syscall-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Move <asm/asm-offsets.h> from trace_syscalls.c to asm/syscall.h
  x86, um: Fix typo in 32-bit system call modifications
  um: Use $(srctree) not $(KBUILD_SRC)
  x86, um: Mark system call tables readonly
  x86, um: Use the same style generated syscall tables as native
  um: Generate headers before generating user-offsets.s
  um: Run host archheaders, allow use of host generated headers
  kbuild, headers.sh: Don't make archheaders explicitly
  x86, syscall: Allow syscall offset to be symbolic
  x86, syscall: Re-fix typo in comment
  x86: Simplify syscallhdr.sh
  x86: Generate system call tables and unistd_*.h from tables
  checksyscalls: Use arch/x86/syscalls/syscall_32.tbl as source
  x86: Machine-readable syscall tables and scripts to process them
  trace: Include <asm/asm-offsets.h> in trace_syscalls.c
  x86-64, ia32: Move compat_ni_syscall into C and its own file
  x86-64, syscall: Adjust comment spacing and remove typo
  kbuild: Add support for an "archheaders" target
  kbuild: Add support for installing generated asm headers

Documentation/kbuild/makefiles.txt

@@ -33,14 +33,15 @@ This document describes the Linux kernel Makefiles.
 
 	=== 6 Architecture Makefiles
 	   --- 6.1 Set variables to tweak the build to the architecture
-	   --- 6.2 Add prerequisites to archprepare:
-	   --- 6.3 List directories to visit when descending
-	   --- 6.4 Architecture-specific boot images
-	   --- 6.5 Building non-kbuild targets
-	   --- 6.6 Commands useful for building a boot image
-	   --- 6.7 Custom kbuild commands
-	   --- 6.8 Preprocessing linker scripts
-	   --- 6.9 Generic header files
+	   --- 6.2 Add prerequisites to archheaders:
+	   --- 6.3 Add prerequisites to archprepare:
+	   --- 6.4 List directories to visit when descending
+	   --- 6.5 Architecture-specific boot images
+	   --- 6.6 Building non-kbuild targets
+	   --- 6.7 Commands useful for building a boot image
+	   --- 6.8 Custom kbuild commands
+	   --- 6.9 Preprocessing linker scripts
+	   --- 6.10 Generic header files
 
 	=== 7 Kbuild syntax for exported headers
 		--- 7.1 header-y
@@ -252,7 +253,7 @@ more details, with real examples.
 	This will create a library lib.a based on delay.o. For kbuild to
 	actually recognize that there is a lib.a being built, the directory
 	shall be listed in libs-y.
-	See also "6.3 List directories to visit when descending".
+	See also "6.4 List directories to visit when descending".
 
 	Use of lib-y is normally restricted to lib/ and arch/*/lib.
 
@@ -974,7 +975,20 @@ When kbuild executes, the following steps are followed (roughly):
 	$(KBUILD_ARFLAGS) set by the top level Makefile to "D" (deterministic
 	mode) if this option is supported by $(AR).
 
---- 6.2 Add prerequisites to archprepare:
+--- 6.2 Add prerequisites to archheaders:
+
+	The archheaders: rule is used to generate header files that
+	may be installed into user space by "make header_install" or
+	"make headers_install_all".  In order to support
+	"make headers_install_all", this target has to be able to run
+	on an unconfigured tree, or a tree configured for another
+	architecture.
+
+	It is run before "make archprepare" when run on the
+	architecture itself.
+
+
+--- 6.3 Add prerequisites to archprepare:
 
 	The archprepare: rule is used to list prerequisites that need to be
 	built before starting to descend down in the subdirectories.
@@ -990,7 +1004,7 @@ When kbuild executes, the following steps are followed (roughly):
 	generating offset header files.
 
 
---- 6.3 List directories to visit when descending
+--- 6.4 List directories to visit when descending
 
 	An arch Makefile cooperates with the top Makefile to define variables
 	which specify how to build the vmlinux file.  Note that there is no
@@ -1019,7 +1033,7 @@ When kbuild executes, the following steps are followed (roughly):
 		drivers-$(CONFIG_OPROFILE)  += arch/sparc64/oprofile/
 
 
---- 6.4 Architecture-specific boot images
+--- 6.5 Architecture-specific boot images
 
 	An arch Makefile specifies goals that take the vmlinux file, compress
 	it, wrap it in bootstrapping code, and copy the resulting files
@@ -1070,7 +1084,7 @@ When kbuild executes, the following steps are followed (roughly):
 
 	When "make" is executed without arguments, bzImage will be built.
 
---- 6.5 Building non-kbuild targets
+--- 6.6 Building non-kbuild targets
 
     extra-y
 
@@ -1090,7 +1104,7 @@ When kbuild executes, the following steps are followed (roughly):
 	shall be built, but shall not be linked as part of built-in.o.
 
 
---- 6.6 Commands useful for building a boot image
+--- 6.7 Commands useful for building a boot image
 
 	Kbuild provides a few macros that are useful when building a
 	boot image.
@@ -1112,7 +1126,7 @@ When kbuild executes, the following steps are followed (roughly):
 	always be built.
 	Assignments to $(targets) are without $(obj)/ prefix.
 	if_changed may be used in conjunction with custom commands as
-	defined in 6.7 "Custom kbuild commands".
+	defined in 6.8 "Custom kbuild commands".
 
 	Note: It is a typical mistake to forget the FORCE prerequisite.
 	Another common pitfall is that whitespace is sometimes
@@ -1171,7 +1185,7 @@ When kbuild executes, the following steps are followed (roughly):
 		$(obj)/%.dtb: $(src)/%.dts
 			$(call cmd,dtc)
 
---- 6.7 Custom kbuild commands
+--- 6.8 Custom kbuild commands
 
 	When kbuild is executing with KBUILD_VERBOSE=0, then only a shorthand
 	of a command is normally displayed.
@@ -1198,7 +1212,7 @@ When kbuild executes, the following steps are followed (roughly):
 	will be displayed with "make KBUILD_VERBOSE=0".
 
 
---- 6.8 Preprocessing linker scripts
+--- 6.9 Preprocessing linker scripts
 
 	When the vmlinux image is built, the linker script
 	arch/$(ARCH)/kernel/vmlinux.lds is used.
@@ -1228,7 +1242,7 @@ When kbuild executes, the following steps are followed (roughly):
 	The kbuild infrastructure for *lds file are used in several
 	architecture-specific files.
 
---- 6.9 Generic header files
+--- 6.10 Generic header files
 
 	The directory include/asm-generic contains the header files
 	that may be shared between individual architectures.

Makefile

@@ -442,7 +442,7 @@ asm-generic:
 
 no-dot-config-targets := clean mrproper distclean \
 			 cscope gtags TAGS tags help %docs check% coccicheck \
-			 include/linux/version.h headers_% \
+			 include/linux/version.h headers_% archheaders \
 			 kernelversion %src-pkg
 
 config-targets := 0
@@ -979,7 +979,7 @@ prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
                    include/config/auto.conf
 	$(cmd_crmodverdir)
 
-archprepare: prepare1 scripts_basic
+archprepare: archheaders prepare1 scripts_basic
 
 prepare0: archprepare FORCE
 	$(Q)$(MAKE) $(build)=.
@@ -1046,8 +1046,11 @@ hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 # If we do an all arch process set dst to asm-$(hdr-arch)
 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
 
+PHONY += archheaders
+archheaders:
+
 PHONY += __headers
-__headers: include/linux/version.h scripts_basic asm-generic FORCE
+__headers: include/linux/version.h scripts_basic asm-generic archheaders FORCE
 	$(Q)$(MAKE) $(build)=scripts build_unifdef
 
 PHONY += headers_install_all

arch/um/Makefile

@@ -64,7 +64,8 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
 #This will adjust *FLAGS accordingly to the platform.
 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
 
-KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include
+KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
+		   -I$(HOST_DIR)/include/generated
 
 # -Derrno=kernel_errno - This turns all kernel references to errno into
 # kernel_errno to separate them from the libc errno.  This allows -fno-common
@@ -96,6 +97,10 @@ endef
 
 KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
 
+archheaders:
+	$(Q)$(MAKE) -C '$(srctree)' KBUILD_SRC= \
+		ARCH=$(SUBARCH) O='$(objtree)' archheaders
+
 archprepare: include/generated/user_constants.h
 
 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
@@ -135,7 +140,7 @@ archclean:
 
 # Generated files
 
-$(HOST_DIR)/um/user-offsets.s: FORCE
+$(HOST_DIR)/um/user-offsets.s: __headers FORCE
 	$(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
 
 define filechk_gen-asm-offsets

arch/x86/Makefile

@@ -117,6 +117,12 @@ KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
 KBUILD_CFLAGS += $(mflags-y)
 KBUILD_AFLAGS += $(mflags-y)
 
+###
+# Syscall table generation
+
+archheaders:
+	$(Q)$(MAKE) $(build)=arch/x86/syscalls all
+
 ###
 # Kernel objects
 

arch/x86/ia32/Makefile

@@ -3,6 +3,7 @@
 #
 
 obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o
+obj-$(CONFIG_IA32_EMULATION) += nosyscall.o syscall_ia32.o
 
 sysv-$(CONFIG_SYSVIPC) := ipc32.o
 obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)