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

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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
  ...
This commit is contained in:
Linus Torvalds 2016-10-14 14:26:58 -07:00
commit 84d69848c9
262 changed files with 1094 additions and 1403 deletions
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16
Documentation/kbuild/makefiles.txt
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@ -41,6 +41,7 @@ This document describes the Linux kernel Makefiles.
--- 6.8 Custom kbuild commands
--- 6.9 Preprocessing linker scripts
--- 6.10 Generic header files
--- 6.11 Post-link pass
=== 7 Kbuild syntax for exported headers
--- 7.1 header-y
@ -1237,6 +1238,21 @@ When kbuild executes, the following steps are followed (roughly):
to list the file in the Kbuild file.
See "7.4 generic-y" for further info on syntax etc.
--- 6.11 Post-link pass
If the file arch/xxx/Makefile.postlink exists, this makefile
will be invoked for post-link objects (vmlinux and modules.ko)
for architectures to run post-link passes on. Must also handle
the clean target.
This pass runs after kallsyms generation. If the architecture
needs to modify symbol locations, rather than manipulate the
kallsyms, it may be easier to add another postlink target for
.tmp_vmlinux? targets to be called from link-vmlinux.sh.
For example, powerpc uses this to check relocation sanity of
the linked vmlinux file.
=== 7 Kbuild syntax for exported headers
The kernel includes a set of headers that is exported to userspace.