Merge git://git.infradead.org/hdrinstall-2.6

* git://git.infradead.org/hdrinstall-2.6:
  Remove export of include/linux/isdn/tpam.h
  Remove <linux/i2c-id.h> and <linux/i2c-algo-ite.h> from userspace export
  Restrict headers exported to userspace for SPARC and SPARC64
  Add empty Kbuild files for 'make headers_install' in remaining arches.
  Add Kbuild file for Alpha 'make headers_install'
  Add Kbuild file for SPARC 'make headers_install'
  Add Kbuild file for IA64 'make headers_install'
  Add Kbuild file for S390 'make headers_install'
  Add Kbuild file for i386 'make headers_install'
  Add Kbuild file for x86_64 'make headers_install'
  Add Kbuild file for PowerPC 'make headers_install'
  Add generic Kbuild files for 'make headers_install'
  Basic implementation of 'make headers_check'
  Basic implementation of 'make headers_install'

Makefile

@@ -874,6 +874,21 @@ PHONY += depend dep
 depend dep:
 	@echo '*** Warning: make $@ is unnecessary now.'
 
+# ---------------------------------------------------------------------------
+# Kernel headers
+INSTALL_HDR_PATH=$(MODLIB)/abi
+export INSTALL_HDR_PATH
+
+PHONY += headers_install
+headers_install: include/linux/version.h
+	$(Q)unifdef -Ux /dev/null
+	$(Q)rm -rf $(INSTALL_HDR_PATH)/include
+	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
+
+PHONY += headers_check
+headers_check: headers_install
+	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
+
 # ---------------------------------------------------------------------------
 # Modules
 
@@ -1048,6 +1063,8 @@ help:
 	@echo  '  cscope	  - Generate cscope index'
 	@echo  '  kernelrelease	  - Output the release version string'
 	@echo  '  kernelversion	  - Output the version stored in Makefile'
+	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
+	@echo  '                    (default: /lib/modules/$$VERSION/abi)'
 	@echo  ''
 	@echo  'Static analysers'
 	@echo  '  checkstack      - Generate a list of stack hogs'

include/Kbuild

+header-y += asm-generic/ linux/ scsi/ sound/ mtd/ rdma/ video/
+header-y += asm-$(ARCH)/ 

include/asm-alpha/Kbuild

+include include/asm-generic/Kbuild.asm
+
+unifdef-y += console.h fpu.h sysinfo.h
+
+header-y += gentrap.h regdef.h pal.h reg.h

include/asm-arm/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-arm26/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-cris/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-frv/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-generic/Kbuild

+header-y += atomic.h errno-base.h errno.h fcntl.h ioctl.h ipc.h mman.h \
+	signal.h statfs.h
+unifdef-y := resource.h siginfo.h

include/asm-generic/Kbuild.asm

+unifdef-y += a.out.h auxvec.h byteorder.h errno.h fcntl.h ioctl.h	\
+	ioctls.h ipcbuf.h irq.h mman.h msgbuf.h param.h poll.h		\
+	posix_types.h ptrace.h resource.h sembuf.h shmbuf.h shmparam.h	\
+	sigcontext.h siginfo.h signal.h socket.h sockios.h stat.h	\
+	statfs.h termbits.h termios.h timex.h types.h unistd.h user.h
+
+# These really shouldn't be exported
+unifdef-y += atomic.h io.h
+
+# These probably shouldn't be exported
+unifdef-y += elf.h page.h

include/asm-h8300/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-i386/Kbuild

+include include/asm-generic/Kbuild.asm
+
+header-y += boot.h cpufeature.h debugreg.h ldt.h setup.h ucontext.h
+
+unifdef-y += mtrr.h vm86.h

include/asm-ia64/Kbuild

+include include/asm-generic/Kbuild.asm
+
+header-y += break.h fpu.h fpswa.h gcc_intrin.h ia64regs.h		\
+	 intel_intrin.h intrinsics.h perfmon_default_smpl.h	\
+	 ptrace_offsets.h rse.h setup.h ucontext.h
+
+unifdef-y += perfmon.h

include/asm-m32r/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-m68k/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-m68knommu/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-mips/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-parisc/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-powerpc/Kbuild

+include include/asm-generic/Kbuild.asm
+
+unifdef-y += a.out.h asm-compat.h bootx.h byteorder.h cputable.h elf.h	\
+	nvram.h param.h posix_types.h ptrace.h seccomp.h signal.h	\
+	termios.h types.h unistd.h
+
+header-y += auxvec.h ioctls.h mman.h sembuf.h siginfo.h stat.h errno.h	\
+	ipcbuf.h msgbuf.h shmbuf.h socket.h termbits.h fcntl.h ipc.h	\
+	poll.h shmparam.h sockios.h ucontext.h ioctl.h linkage.h	\
+	resource.h sigcontext.h statfs.h

include/asm-s390/Kbuild

+include include/asm-generic/Kbuild.asm
+
+unifdef-y += cmb.h debug.h
+header-y += dasd.h qeth.h tape390.h ucontext.h vtoc.h z90crypt.h

include/asm-sh/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-sh64/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-sparc/Kbuild

+include include/asm-generic/Kbuild.asm
+
+unifdef-y += fbio.h perfctr.h psr.h
+header-y += apc.h asi.h auxio.h bpp.h head.h ipc.h jsflash.h	\
+	openpromio.h pbm.h pconf.h pgtsun4.h reg.h traps.h	\
+	turbosparc.h vfc_ioctls.h winmacro.h

include/asm-sparc64/Kbuild

+include include/asm-generic/Kbuild.asm
+
+ALTARCH := sparc
+ARCHDEF := defined __sparc__ && defined __arch64__
+ALTARCHDEF := defined __sparc__ && !defined __arch64__
+
+unifdef-y := fbio.h perfctr.h
+header-y += apb.h asi.h bbc.h bpp.h display7seg.h envctrl.h floppy.h	\
+	ipc.h kdebug.h mostek.h openprom.h openpromio.h parport.h	\
+	pconf.h psrcompat.h pstate.h reg.h uctx.h utrap.h watchdog.h

include/asm-um/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-v850/Kbuild

+include include/asm-generic/Kbuild.asm

include/asm-x86_64/Kbuild

+include include/asm-generic/Kbuild.asm
+
+ALTARCH := i386
+ARCHDEF := defined __x86_64__
+ALTARCHDEF := defined __i386__
+
+header-y += boot.h bootsetup.h cpufeature.h debugreg.h ldt.h \
+	 msr.h prctl.h setup.h sigcontext32.h ucontext.h \
+	 vsyscall32.h
+
+unifdef-y += mce.h mtrr.h vsyscall.h

include/asm-xtensa/Kbuild

+include include/asm-generic/Kbuild.asm

include/linux/Kbuild

+header-y := byteorder/ dvb/ hdlc/ isdn/ nfsd/ raid/ sunrpc/ tc_act/	\
+	netfilter/ netfilter_arp/ netfilter_bridge/ netfilter_ipv4/	\
+	netfilter_ipv6/
+
+header-y += affs_fs.h affs_hardblocks.h aio_abi.h a.out.h arcfb.h	\
+	atmapi.h atmbr2684.h atmclip.h atm_eni.h atm_he.h		\
+	atm_idt77105.h atmioc.h atmlec.h atmmpc.h atm_nicstar.h		\
+	atmppp.h atmsap.h atmsvc.h atm_zatm.h auto_fs4.h auxvec.h	\
+	awe_voice.h ax25.h b1lli.h baycom.h bfs_fs.h blkpg.h		\
+	bpqether.h cdk.h chio.h coda_psdev.h coff.h comstats.h		\
+	consolemap.h cycx_cfm.h devfs_fs.h dm-ioctl.h dn.h dqblk_v1.h	\
+	dqblk_v2.h dqblk_xfs.h efs_fs_sb.h elf-fdpic.h elf.h elf-em.h	\
+	fadvise.h fd.h fdreg.h ftape-header-segment.h ftape-vendors.h	\
+	fuse.h futex.h genetlink.h gen_stats.h gigaset_dev.h hdsmart.h	\
+	hpfs_fs.h hysdn_if.h i2c-dev.h i8k.h icmp.h			\
+	if_arcnet.h if_arp.h if_bonding.h if_cablemodem.h if_fc.h	\
+	if_fddi.h if.h if_hippi.h if_infiniband.h if_packet.h		\
+	if_plip.h if_ppp.h if_slip.h if_strip.h if_tunnel.h in6.h	\
+	in_route.h ioctl.h ip.h ipmi_msgdefs.h ip_mp_alg.h ipsec.h	\
+	ipx.h irda.h isdn_divertif.h iso_fs.h ite_gpio.h ixjuser.h	\
+	jffs2.h keyctl.h limits.h major.h matroxfb.h meye.h minix_fs.h	\
+	mmtimer.h mqueue.h mtio.h ncp_no.h netfilter_arp.h netrom.h	\
+	nfs2.h nfs4_mount.h nfs_mount.h openprom_fs.h param.h		\
+	pci_ids.h pci_regs.h personality.h pfkeyv2.h pg.h pkt_cls.h	\
+	pkt_sched.h posix_types.h ppdev.h prctl.h ps2esdi.h qic117.h	\
+	qnxtypes.h quotaio_v1.h quotaio_v2.h radeonfb.h raw.h		\
+	resource.h rose.h sctp.h smbno.h snmp.h sockios.h som.h		\
+	sound.h stddef.h synclink.h telephony.h termios.h ticable.h	\
+	times.h tiocl.h tipc.h toshiba.h ultrasound.h un.h utime.h	\
+	utsname.h video_decoder.h video_encoder.h videotext.h vt.h	\
+	wavefront.h wireless.h xattr.h x25.h zorro_ids.h
+
+unifdef-y += acct.h adb.h adfs_fs.h agpgart.h apm_bios.h atalk.h	\
+	atmarp.h atmdev.h atm.h atm_tcp.h audit.h auto_fs.h binfmts.h	\
+	capability.h capi.h cciss_ioctl.h cdrom.h cm4000_cs.h		\
+	cn_proc.h coda.h connector.h cramfs_fs.h cuda.h cyclades.h	\
+	dccp.h dirent.h divert.h elfcore.h errno.h errqueue.h		\
+	ethtool.h eventpoll.h ext2_fs.h ext3_fs.h fb.h fcntl.h		\
+	filter.h flat.h fs.h ftape.h gameport.h generic_serial.h	\
+	genhd.h hayesesp.h hdlcdrv.h hdlc.h hdreg.h hiddev.h hpet.h	\
+	i2c.h i2o-dev.h icmpv6.h if_bridge.h if_ec.h			\
+	if_eql.h if_ether.h if_frad.h if_ltalk.h if_pppox.h		\
+	if_shaper.h if_tr.h if_tun.h if_vlan.h if_wanpipe.h igmp.h	\
+	inet_diag.h in.h inotify.h input.h ipc.h ipmi.h ipv6.h		\
+	ipv6_route.h isdn.h isdnif.h isdn_ppp.h isicom.h jbd.h		\
+	joystick.h kdev_t.h kd.h kernelcapi.h kernel.h keyboard.h	\
+	llc.h loop.h lp.h mempolicy.h mii.h mman.h mroute.h msdos_fs.h	\
+	msg.h nbd.h ncp_fs.h ncp.h ncp_mount.h netdevice.h		\
+	netfilter_bridge.h netfilter_decnet.h netfilter.h		\
+	netfilter_ipv4.h netfilter_ipv6.h netfilter_logging.h net.h	\
+	netlink.h nfs3.h nfs4.h nfsacl.h nfs_fs.h nfs.h nfs_idmap.h	\
+	n_r3964.h nubus.h nvram.h parport.h patchkey.h pci.h pktcdvd.h	\
+	pmu.h poll.h ppp_defs.h ppp-comp.h ptrace.h qnx4_fs.h quota.h	\
+	random.h reboot.h reiserfs_fs.h reiserfs_xattr.h romfs_fs.h	\
+	route.h rtc.h rtnetlink.h scc.h sched.h sdla.h			\
+	selinux_netlink.h sem.h serial_core.h serial.h serio.h shm.h	\
+	signal.h smb_fs.h smb.h smb_mount.h socket.h sonet.h sonypi.h	\
+	soundcard.h stat.h sysctl.h tcp.h time.h timex.h tty.h types.h	\
+	udf_fs_i.h udp.h uinput.h uio.h unistd.h usb_ch9.h		\
+	usbdevice_fs.h user.h videodev2.h videodev.h wait.h		\
+	wanrouter.h watchdog.h xfrm.h zftape.h
+
+objhdr-y := version.h

include/linux/byteorder/Kbuild

+unifdef-y += generic.h swabb.h swab.h
+header-y += big_endian.h little_endian.h pdp_endian.h

include/linux/dvb/Kbuild

+header-y += ca.h frontend.h net.h osd.h version.h
+unifdef-y := audio.h dmx.h video.h

include/linux/hdlc/Kbuild

+header-y += ioctl.h

include/linux/isdn/Kbuild

+header-y += capicmd.h

include/linux/netfilter/Kbuild

+header-y := nf_conntrack_sctp.h nf_conntrack_tuple_common.h		\
+	    nfnetlink_conntrack.h nfnetlink_log.h nfnetlink_queue.h	\
+	    xt_CLASSIFY.h xt_comment.h xt_connbytes.h xt_connmark.h	\
+	    xt_CONNMARK.h xt_conntrack.h xt_dccp.h xt_esp.h		\
+	    xt_helper.h xt_length.h xt_limit.h xt_mac.h xt_mark.h	\
+	    xt_MARK.h xt_multiport.h xt_NFQUEUE.h xt_pkttype.h		\
+	    xt_policy.h xt_realm.h xt_sctp.h xt_state.h xt_string.h	\
+	    xt_tcpmss.h xt_tcpudp.h
+
+unifdef-y := nf_conntrack_common.h nf_conntrack_ftp.h		\
+	nf_conntrack_tcp.h nfnetlink.h x_tables.h xt_physdev.h

include/linux/netfilter_arp/Kbuild

+header-y := arpt_mangle.h
+unifdef-y := arp_tables.h

include/linux/netfilter_bridge/Kbuild

+header-y += ebt_among.h ebt_arp.h ebt_arpreply.h ebt_ip.h ebt_limit.h	\
+	ebt_log.h ebt_mark_m.h ebt_mark_t.h ebt_nat.h ebt_pkttype.h	\
+	ebt_redirect.h ebt_stp.h ebt_ulog.h ebt_vlan.h
+unifdef-y := ebtables.h ebt_802_3.h

include/linux/netfilter_ipv4/Kbuild

+
+header-y := ip_conntrack_helper.h ip_conntrack_helper_h323_asn1.h	\
+	    ip_conntrack_helper_h323_types.h ip_conntrack_protocol.h	\
+	    ip_conntrack_sctp.h ip_conntrack_tcp.h ip_conntrack_tftp.h	\
+	    ip_nat_pptp.h ipt_addrtype.h ipt_ah.h	\
+	    ipt_CLASSIFY.h ipt_CLUSTERIP.h ipt_comment.h		\
+	    ipt_connbytes.h ipt_connmark.h ipt_CONNMARK.h		\
+	    ipt_conntrack.h ipt_dccp.h ipt_dscp.h ipt_DSCP.h ipt_ecn.h	\
+	    ipt_ECN.h ipt_esp.h ipt_hashlimit.h ipt_helper.h		\
+	    ipt_iprange.h ipt_length.h ipt_limit.h ipt_LOG.h ipt_mac.h	\
+	    ipt_mark.h ipt_MARK.h ipt_multiport.h ipt_NFQUEUE.h		\
+	    ipt_owner.h ipt_physdev.h ipt_pkttype.h ipt_policy.h	\
+	    ipt_realm.h ipt_recent.h ipt_REJECT.h ipt_SAME.h		\
+	    ipt_sctp.h ipt_state.h ipt_string.h ipt_tcpmss.h		\
+	    ipt_TCPMSS.h ipt_tos.h ipt_TOS.h ipt_ttl.h ipt_TTL.h	\
+	    ipt_ULOG.h
+
+unifdef-y := ip_conntrack.h ip_conntrack_h323.h ip_conntrack_irc.h	\
+	ip_conntrack_pptp.h ip_conntrack_proto_gre.h			\
+	ip_conntrack_tuple.h ip_nat.h ip_nat_rule.h ip_queue.h		\
+	ip_tables.h

include/linux/netfilter_ipv6/Kbuild

+header-y += ip6t_HL.h ip6t_LOG.h ip6t_MARK.h ip6t_REJECT.h ip6t_ah.h	\
+	ip6t_esp.h ip6t_frag.h ip6t_hl.h ip6t_ipv6header.h		\
+	ip6t_length.h ip6t_limit.h ip6t_mac.h ip6t_mark.h		\
+	ip6t_multiport.h ip6t_opts.h ip6t_owner.h ip6t_policy.h		\
+	ip6t_physdev.h ip6t_rt.h
+unifdef-y := ip6_tables.h

include/linux/nfsd/Kbuild

+unifdef-y := const.h export.h stats.h syscall.h nfsfh.h debug.h auth.h
+

include/linux/raid/Kbuild

+header-y += md_p.h md_u.h

include/linux/sunrpc/Kbuild

+unifdef-y := debug.h

include/linux/tc_act/Kbuild

+header-y += tc_gact.h tc_ipt.h tc_mirred.h tc_pedit.h

include/linux/tc_ematch/Kbuild

+headers-y := tc_em_cmp.h tc_em_meta.h tc_em_nbyte.h tc_em_text.h

include/mtd/Kbuild

+unifdef-y := mtd-abi.h
+header-y := inftl-user.h jffs2-user.h mtd-user.h nftl-user.h

include/rdma/Kbuild

+header-y := ib_user_mad.h

include/scsi/Kbuild

+header-y += scsi.h
+unifdef-y := scsi_ioctl.h sg.h

include/sound/Kbuild

+header-y := asound_fm.h hdsp.h hdspm.h sfnt_info.h sscape_ioctl.h
+unifdef-y := asequencer.h asound.h emu10k1.h sb16_csp.h 

include/video/Kbuild

+unifdef-y := sisfb.h

scripts/Makefile.headersinst

+# ==========================================================================
+# Installing headers
+#
+# header-y files will be installed verbatim
+# unifdef-y are the files where unifdef will be run before installing files
+# objhdr-y are generated files that will be installed verbatim
+#
+# ==========================================================================
+
+UNIFDEF := unifdef -U__KERNEL__
+
+# Eliminate the contents of (and inclusions of) compiler.h
+HDRSED  := sed 	-e "s/ inline / __inline__ /g" \
+		-e "s/[[:space:]]__user[[:space:]]\+/ /g" \
+		-e "s/(__user[[:space:]]\+/ (/g" \
+		-e "s/[[:space:]]__force[[:space:]]\+/ /g" \
+		-e "s/(__force[[:space:]]\+/ (/g" \
+		-e "s/[[:space:]]__iomem[[:space:]]\+/ /g" \
+		-e "s/(__iomem[[:space:]]\+/ (/g" \
+		-e "s/[[:space:]]__attribute_const__[[:space:]]\+/\ /g" \
+		-e "s/[[:space:]]__attribute_const__$$//" \
+		-e "/^\#include <linux\/compiler.h>/d"
+
+_dst := $(if $(dst),$(dst),$(obj))
+
+.PHONY: __headersinst
+__headersinst:
+
+
+ifeq (,$(patsubst include/asm/%,,$(obj)/))
+# For producing the generated stuff in include/asm for biarch builds, include
+# both sets of Kbuild files; we'll generate anything which is mentioned in
+# _either_ arch, and recurse into subdirectories which are mentioned in either
+# arch. Since some directories may exist in one but not the other, we must
+# use '-include'.
+GENASM := 1
+archasm	   := $(subst include/asm,asm-$(ARCH),$(obj))
+altarchasm := $(subst include/asm,asm-$(ALTARCH),$(obj))
+-include $(srctree)/include/$(archasm)/Kbuild
+-include $(srctree)/include/$(altarchasm)/Kbuild
+else
+include $(srctree)/$(obj)/Kbuild
+endif
+
+include scripts/Kbuild.include
+
+# If this is include/asm-$(ARCH) and there's no $(ALTARCH), then
+# override $(_dst) so that we install to include/asm directly.
+ifeq ($(obj)$(ALTARCH),include/asm-$(ARCH))
+     _dst := include/asm
+endif
+
+header-y	:= $(sort $(header-y))
+unifdef-y	:= $(sort $(unifdef-y))
+subdir-y	:= $(patsubst %/,%,$(filter %/, $(header-y)))
+header-y	:= $(filter-out %/, $(header-y))
+header-y	:= $(filter-out $(unifdef-y),$(header-y))
+
+ifdef ALTARCH
+ifeq ($(obj),include/asm-$(ARCH))
+altarch-y	:= altarch-dir
+endif
+endif
+
+# Make the definitions visible for recursive make invocations
+export ALTARCH
+export ARCHDEF
+export ALTARCHDEF
+
+quiet_cmd_o_hdr_install   = INSTALL $(_dst)/$@
+      cmd_o_hdr_install   = cp $(objtree)/$(obj)/$@ $(INSTALL_HDR_PATH)/$(_dst)
+
+quiet_cmd_headers_install = INSTALL $(_dst)/$@
+      cmd_headers_install = $(HDRSED) $(srctree)/$(obj)/$@		\
+			    > $(INSTALL_HDR_PATH)/$(_dst)/$@
+
+quiet_cmd_unifdef	  = UNIFDEF $(_dst)/$@
+      cmd_unifdef	  = $(UNIFDEF) $(srctree)/$(obj)/$@ | $(HDRSED)	\
+                            > $(INSTALL_HDR_PATH)/$(_dst)/$@ || :
+
+quiet_cmd_check		  = CHECK   $(_dst)/$@
+      cmd_check		  = $(srctree)/scripts/hdrcheck.sh		\
+                              $(INSTALL_HDR_PATH)/include		\
+			      $(INSTALL_HDR_PATH)/$(_dst)/$@
+
+quiet_cmd_mkdir		  = MKDIR   $@
+      cmd_mkdir		  = mkdir -p $(INSTALL_HDR_PATH)/$@
+
+quiet_cmd_gen		  = GEN     $(_dst)/$@
+      cmd_gen		  = \
+STUBDEF=__ASM_STUB_`echo $@ | tr a-z. A-Z_`;				\
+(echo "/* File autogenerated by 'make headers_install' */" ;		\
+echo "\#ifndef $$STUBDEF" ;						\
+echo "\#define $$STUBDEF" ;						\
+echo "\# if $(ARCHDEF)" ;						\
+if [ -r $(srctree)/include/$(archasm)/$@ ]; then			\
+	echo "\#  include <$(archasm)/$@>" ;				\
+else									\
+	echo "\#  error $(archasm)/$@ does not exist in"		\
+			"the $(ARCH) architecture" ;			\
+fi ;									\
+echo "\# elif $(ALTARCHDEF)" ;						\
+if [ -r $(srctree)/include/$(altarchasm)/$@ ]; then			\
+	echo "\#  include <$(altarchasm)/$@>" ;				\
+else									\
+	echo "\#  error $(altarchasm)/$@ does not exist in"		\
+			"the $(ALTARCH) architecture" ;			\
+fi ;									\
+echo "\# else" ;							\
+echo "\#  warning This machine appears to be"				\
+		 "neither $(ARCH) nor $(ALTARCH)." ;			\
+echo "\# endif" ;							\
+echo "\#endif /* $$STUBDEF */" ;					\
+) > $(INSTALL_HDR_PATH)/$(_dst)/$@
+
+__headersinst: $(subdir-y) $(header-y) $(unifdef-y) $(altarch-y) $(objhdr-y)
+
+.PHONY: $(header-y) $(unifdef-y) $(subdir-y)
+
+ifdef HDRCHECK
+# Rules for checking headers
+$(objhdr-y) $(header-y) $(unifdef-y):
+	$(call cmd,check)
+else
+# Rules for installing headers
+
+$(objhdr-y) $(subdir-y) $(header-y) $(unifdef-y): $(_dst)
+
+.PHONY: $(_dst)
+$(_dst):
+	$(call cmd,mkdir)
+
+ifdef GENASM
+$(objhdr-y) $(header-y) $(unifdef-y):
+	$(call cmd,gen)
+
+else
+$(objhdr-y):
+	$(call cmd,o_hdr_install)
+
+$(header-y):
+	$(call cmd,headers_install)
+
+$(unifdef-y):
+	$(call cmd,unifdef)
+endif
+endif
+
+hdrinst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
+
+.PHONY: altarch-dir
+altarch-dir:
+	$(Q)$(MAKE) $(hdrinst)=include/asm-$(ALTARCH) dst=include/asm-$(ALTARCH)
+	$(Q)$(MAKE) $(hdrinst)=include/asm dst=include/asm
+
+# Recursion
+$(subdir-y):
+	$(Q)$(MAKE) $(hdrinst)=$(obj)/$@ dst=$(_dst)/$@ rel=../$(rel)

scripts/hdrcheck.sh

+#!/bin/sh
+
+for FILE in `grep '^#include <' $2 | cut -f2 -d\< | cut -f1 -d\> | egrep ^linux\|^asm` ; do
+    if [ ! -r $1/$FILE ]; then
+	echo $2 requires $FILE, which does not exist
+	exit 1
+    fi
+done