UAPI fixes 2012-10-17

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Merge tag 'uapi-fixes-20121017' of git://git.infradead.org/users/dhowells/linux-headers

Pull misc UAPI fixes from David Howells:
 "They do a number of things:

  (1) Import a patch from Catalin Marinas to extend the generic-y in
      Kbuild facility to uapi directories.

  (2) Make arch/tile's ucontext.h file use (1) and remove the header-y
      line from the kernel internal side of things.

  (3) Remove some now-empty conditional bits from include/linux/Kbuild.
      The contents got moved to the UAPI side of things along with new
      conditionals.

  (4) Deal with now-empty files:

     (a) Empty Kbuild files under include/ get removed.

     (b) Empty Kbuild files under arch/ get comments to hold them as
         they are likely to end up with generic-y or genhdr-y lines.
         Deleting them appears to work if we want to go that route.

     (c) Put a comment into uapi/asm-generic/kvm_para.h to prevent the
         patch program from deleting that, and made the arches with
         empty kvm_para.h uapi files use that instead of having their
         own files.

     (d) Put comments into four other empty uapi/ headers to prevent the
         patch program from deleting them.

  A question: Is this the right way to deal with the now-empty Kbuild
  files?

  The ones under include/ are unlikely to be used - even for generated
  files, I think - so getting rid of them is probably okay.  Once all
  the bits are in, we can probably remove all the Kbuild files under
  include/ that aren't also under include/uapi/.

  The ones under arch/ are more of an issue because of the potential for
  generic-y and genhdr-y."

* tag 'uapi-fixes-20121017' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: Make arch/sparc/include/uapi/asm/sigcontext.h non-empty
  UAPI: Make arch/sh/include/uapi/asm/hw_breakpoint.h non-empty
  UAPI: Make arch/mn10300/include/uapi/asm/setup.h non-empty
  UAPI: Put a comment into uapi/asm-generic/kvm_para.h and use it from arches
  UAPI: The tile arch uses the generic ucontext.h file
  UAPI: Place comments in empty arch Kbuilds to make them non-empty
  UAPI: Remove empty non-UAPI Kbuild files
  UAPI: Remove empty conditionals from include/linux/Kbuild
  UAPI: Make uapi/linux/irqnr.h non-empty
  uapi: Allow automatic generation of uapi/asm/ header files

Makefile

@@ -437,7 +437,9 @@ endif
 PHONY += asm-generic
 asm-generic:
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
-	            obj=arch/$(SRCARCH)/include/generated/asm
+	            src=asm obj=arch/$(SRCARCH)/include/generated/asm
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
+	            src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
 
 # To make sure we do not include .config for any of the *config targets
 # catch them early, and hand them over to scripts/kconfig/Makefile

arch/ia64/include/uapi/asm/Kbuild

@@ -1,6 +1,8 @@
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
+generic-y += kvm_para.h
+
 header-y += auxvec.h
 header-y += bitsperlong.h
 header-y += break.h

arch/mips/include/asm/Kbuild

@@ -0,0 +1 @@
+# MIPS headers

arch/mn10300/include/uapi/asm/setup.h

@@ -0,0 +1,4 @@
+/*
+ * There isn't anything here anymore, but the file must not be empty or patch
+ * will delete it.
+ */

arch/s390/include/uapi/asm/Kbuild

@@ -1,6 +1,8 @@
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
+generic-y += kvm_para.h
+
 header-y += auxvec.h
 header-y += bitsperlong.h
 header-y += byteorder.h

arch/sh/include/uapi/asm/hw_breakpoint.h

@@ -0,0 +1,4 @@
+/*
+ * There isn't anything here anymore, but the file must not be empty or patch
+ * will delete it.
+ */

arch/sparc/include/uapi/asm/sigcontext.h

@@ -0,0 +1,4 @@
+/*
+ * There isn't anything here anymore, but the file must not be empty or patch
+ * will delete it.
+ */

arch/tile/include/arch/Kbuild

@@ -0,0 +1 @@
+# Tile arch headers

arch/tile/include/asm/Kbuild

@@ -1,8 +1,6 @@
 
 header-y += ../arch/
 
-header-y += ucontext.h
-
 generic-y += bug.h
 generic-y += bugs.h
 generic-y += clkdev.h
@@ -37,5 +35,4 @@ generic-y += statfs.h
 generic-y += termbits.h
 generic-y += termios.h
 generic-y += types.h
-generic-y += ucontext.h
 generic-y += xor.h

arch/tile/include/uapi/asm/Kbuild

@@ -15,4 +15,7 @@ header-y += siginfo.h
 header-y += signal.h
 header-y += stat.h
 header-y += swab.h
+header-y += ucontext.h
 header-y += unistd.h
+
+generic-y += ucontext.h

include/Kbuild

@@ -1,12 +1,8 @@
 # Top-level Makefile calls into asm-$(ARCH)
 # List only non-arch directories below
 
-header-y += asm-generic/
 header-y += linux/
 header-y += sound/
-header-y += mtd/
 header-y += rdma/
 header-y += video/
-header-y += drm/
-header-y += xen/
 header-y += scsi/

include/linux/Kbuild

@@ -1,31 +1,5 @@
-header-y += byteorder/
-header-y += can/
-header-y += caif/
 header-y += dvb/
 header-y += hdlc/
 header-y += hsi/
-header-y += isdn/
-header-y += mmc/
-header-y += nfsd/
 header-y += raid/
-header-y += spi/
-header-y += sunrpc/
-header-y += tc_act/
-header-y += tc_ematch/
-header-y += netfilter/
-header-y += netfilter_arp/
-header-y += netfilter_bridge/
-header-y += netfilter_ipv4/
-header-y += netfilter_ipv6/
 header-y += usb/
-header-y += wimax/
-
-ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/a.out.h \
-		  $(srctree)/arch/$(SRCARCH)/include/uapi/asm/a.out.h),)
-endif
-ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/kvm.h \
-		  $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm.h),)
-endif
-ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/kvm_para.h \
-		  $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm_para.h),)
-endif

include/linux/netfilter/Kbuild

@@ -1 +0,0 @@
-header-y += ipset/

include/uapi/asm-generic/kvm_para.h

@@ -0,0 +1,4 @@
+/*
+ * There isn't anything here, but the file must not be empty or patch
+ * will delete it.
+ */

include/uapi/linux/irqnr.h

@@ -0,0 +1,4 @@
+/*
+ * There isn't anything here anymore, but the file must not be empty or patch
+ * will delete it.
+ */

scripts/Makefile.asm-generic

@@ -5,7 +5,7 @@
 # and for each file listed in this file with generic-y creates
 # a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/asm)
 
-kbuild-file := $(srctree)/arch/$(SRCARCH)/include/asm/Kbuild
+kbuild-file := $(srctree)/arch/$(SRCARCH)/include/$(src)/Kbuild
 -include $(kbuild-file)
 
 include scripts/Kbuild.include