Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

Pull kbuild updates from Michal Marek:

 - EXPORT_SYMBOL for asm source by Al Viro.

   This does bring a regression, because genksyms no longer generates
   checksums for these symbols (CONFIG_MODVERSIONS). Nick Piggin is
   working on a patch to fix this.

   Plus, we are talking about functions like strcpy(), which rarely
   change prototypes.

 - Fixes for PPC fallout of the above by Stephen Rothwell and Nick
   Piggin

 - fixdep speedup by Alexey Dobriyan.

 - preparatory work by Nick Piggin to allow architectures to build with
   -ffunction-sections, -fdata-sections and --gc-sections

 - CONFIG_THIN_ARCHIVES support by Stephen Rothwell

 - fix for filenames with colons in the initramfs source by me.

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (22 commits)
  initramfs: Escape colons in depfile
  ppc: there is no clear_pages to export
  powerpc/64: whitelist unresolved modversions CRCs
  kbuild: -ffunction-sections fix for archs with conflicting sections
  kbuild: add arch specific post-link Makefile
  kbuild: allow archs to select link dead code/data elimination
  kbuild: allow architectures to use thin archives instead of ld -r
  kbuild: Regenerate genksyms lexer
  kbuild: genksyms fix for typeof handling
  fixdep: faster CONFIG_ search
  ia64: move exports to definitions
  sparc32: debride memcpy.S a bit
  [sparc] unify 32bit and 64bit string.h
  sparc: move exports to definitions
  ppc: move exports to definitions
  arm: move exports to definitions
  s390: move exports to definitions
  m68k: move exports to definitions
  alpha: move exports to actual definitions
  x86: move exports to actual definitions
  ...

diff --cc Makefile
index 27f97b5,83dae63..fa2c3bd
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -621,8 -621,12 +621,13 @@@ include arch/$(SRCARCH)/Makefil
  
  KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
  KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
 +KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
  
+ ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
+ KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
+ KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
+ endif
+ 
  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  KBUILD_CFLAGS += -Os
  else

diff --cc arch/Kconfig
index 180ea33,48d1e76..11d3495
--- 1/arch/Kconfig
--- 2/arch/Kconfig
+++ b/arch/Kconfig
@@@ -450,15 -461,27 +450,36 @@@ config CC_STACKPROTECTOR_STRON
  
  endchoice
  
+ config THIN_ARCHIVES
+       bool
+       help
+         Select this if the architecture wants to use thin archives
+         instead of ld -r to create the built-in.o files.
+ 
+ config LD_DEAD_CODE_DATA_ELIMINATION
+       bool
+       help
+         Select this if the architecture wants to do dead code and
+         data elimination with the linker by compiling with
+         -ffunction-sections -fdata-sections and linking with
+         --gc-sections.
+ 
+         This requires that the arch annotates or otherwise protects
+         its external entry points from being discarded. Linker scripts
+         must also merge .text.*, .data.*, and .bss.* correctly into
+         output sections. Care must be taken not to pull in unrelated
+         sections (e.g., '.text.init'). Typically '.' in section names
+         is used to distinguish them from label names / C identifiers.
+ 
 +config HAVE_ARCH_WITHIN_STACK_FRAMES
 +      bool
 +      help
 +        An architecture should select this if it can walk the kernel stack
 +        frames to determine if an object is part of either the arguments
 +        or local variables (i.e. that it excludes saved return addresses,
 +        and similar) by implementing an inline arch_within_stack_frames(),
 +        which is used by CONFIG_HARDENED_USERCOPY.
 +
  config HAVE_CONTEXT_TRACKING
        bool
        help

diff --cc arch/arm/lib/delay.c
Simple merge

diff --cc arch/arm/mach-imx/Makefile
index cab1289,8ed8ab5..737450f
--- 1/arch/arm/mach-imx/Makefile
--- 2/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@@ -32,9 -32,13 +32,8 @@@ endi
  
  ifdef CONFIG_SND_IMX_SOC
  obj-y += ssi-fiq.o
- obj-y += ssi-fiq-ksym.o
  endif
  
 -# i.MX1 based machines
 -obj-$(CONFIG_MACH_SCB9328) += mach-scb9328.o
 -obj-$(CONFIG_MACH_APF9328) += mach-apf9328.o
 -obj-$(CONFIG_MACH_IMX1_DT) += imx1-dt.o
 -
  # i.MX21 based machines
  obj-$(CONFIG_MACH_MX21ADS) += mach-mx21ads.o
  

diff --cc arch/m68k/kernel/Makefile
Simple merge

diff --cc arch/powerpc/kernel/Makefile
Simple merge

diff --cc arch/powerpc/kernel/entry_32.S
Simple merge

diff --cc arch/powerpc/kernel/entry_64.S
Simple merge

diff --cc arch/powerpc/kernel/fpu.S
Simple merge

diff --cc arch/powerpc/kernel/head_32.S
Simple merge

diff --cc arch/powerpc/kernel/head_64.S
Simple merge

diff --cc arch/powerpc/kernel/head_8xx.S
Simple merge

diff --cc arch/powerpc/kernel/misc_32.S
index 03756ff,f515610..93cf7a5
--- 1/arch/powerpc/kernel/misc_32.S
--- 2/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@@ -358,8 -360,7 +360,9 @@@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_
        sync                            /* additional sync needed on g4 */
        isync
        blr
 +_ASM_NOKPROBE_SYMBOL(flush_icache_range)
+ EXPORT_SYMBOL(flush_icache_range)
 +
  /*
   * Flush a particular page from the data cache to RAM.
   * Note: this is necessary because the instruction cache does *not*

diff --cc arch/powerpc/kernel/misc_64.S
index 9f0bed2,8b52684..4f17867
--- 1/arch/powerpc/kernel/misc_64.S
--- 2/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@@ -109,8 -110,8 +110,9 @@@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_
        bdnz    2b
        isync
        blr
 -      .previous .text
 +_ASM_NOKPROBE_SYMBOL(flush_icache_range)
+ EXPORT_SYMBOL(flush_icache_range)
 +
  /*
   * Like above, but only do the D-cache.
   *

diff --cc arch/powerpc/kernel/pci-common.c
Simple merge

diff --cc arch/powerpc/kernel/setup_32.c
Simple merge

diff --cc arch/powerpc/kernel/time.c
Simple merge

diff --cc arch/powerpc/kernel/vector.S
index bc85bdf,388ec64..0c123f3
--- 1/arch/powerpc/kernel/vector.S
--- 2/arch/powerpc/kernel/vector.S
+++ b/arch/powerpc/kernel/vector.S
@@@ -6,7 -6,33 +6,8 @@@
  #include <asm/thread_info.h>
  #include <asm/page.h>
  #include <asm/ptrace.h>
+ #include <asm/export.h>
  
 -#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 -/* void do_load_up_transact_altivec(struct thread_struct *thread)
 - *
 - * This is similar to load_up_altivec but for the transactional version of the
 - * vector regs.  It doesn't mess with the task MSR or valid flags.
 - * Furthermore, VEC laziness is not supported with TM currently.
 - */
 -_GLOBAL(do_load_up_transact_altivec)
 -      mfmsr   r6
 -      oris    r5,r6,MSR_VEC@h
 -      MTMSRD(r5)
 -      isync
 -
 -      li      r4,1
 -      stw     r4,THREAD_USED_VR(r3)
 -
 -      li      r10,THREAD_TRANSACT_VRSTATE+VRSTATE_VSCR
 -      lvx     v0,r10,r3
 -      mtvscr  v0
 -      addi    r10,r3,THREAD_TRANSACT_VRSTATE
 -      REST_32VRS(0,r4,r10)
 -
 -      blr
 -#endif
 -
  /*
   * Load state from memory into VMX registers including VSCR.
   * Assumes the caller has enabled VMX in the MSR.

diff --cc arch/powerpc/lib/Makefile
Simple merge

diff --cc arch/powerpc/lib/checksum_32.S
Simple merge

diff --cc arch/powerpc/lib/copyuser_64.S
Simple merge

diff --cc arch/powerpc/lib/mem_64.S
Simple merge

diff --cc arch/s390/kernel/Makefile
Simple merge

diff --cc arch/x86/entry/entry_32.S
Simple merge

diff --cc arch/x86/entry/entry_64.S
Simple merge

diff --cc arch/x86/kernel/Makefile
Simple merge

diff --cc arch/x86/kernel/head_32.S
Simple merge

diff --cc arch/x86/kernel/head_64.S
Simple merge

diff --cc arch/x86/lib/hweight.S
Simple merge

diff --cc arch/x86/lib/memcpy_64.S
index 49e6eba,94c917a..779782f
--- 1/arch/x86/lib/memcpy_64.S
--- 2/arch/x86/lib/memcpy_64.S
+++ b/arch/x86/lib/memcpy_64.S
@@@ -273,7 -276,8 +276,8 @@@ ENTRY(memcpy_mcsafe_unrolled
  .L_done_memcpy_trap:
        xorq %rax, %rax
        ret
 -ENDPROC(memcpy_mcsafe)
 -EXPORT_SYMBOL_GPL(memcpy_mcsafe)
 +ENDPROC(memcpy_mcsafe_unrolled)
++EXPORT_SYMBOL_GPL(memcpy_mcsafe_unrolled)
  
        .section .fixup, "ax"
        /* Return -EFAULT for any failure */

diff --cc include/asm-generic/vmlinux.lds.h
Simple merge

diff --cc include/linux/compiler.h
Simple merge

diff --cc include/linux/export.h
Simple merge

diff --cc include/linux/init.h
Simple merge