[PATCH 2/3] build system: section garbage collection for vmlinux

[Denys Vlasenko <vda.linux@googlemail.com>]

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On Wednesday 05 September 2007 14:47, Denys Vlasenko wrote:
> On Wednesday 05 September 2007 14:43, Denys Vlasenko wrote:
> > These patches fix section names and add
> > CONFIG_DISCARD_UNUSED_SECTIONS. It is not enabled
> > unconditionally because only newest binutils have
> > ld --gc-sections which is stable enough for kernel use.
> > IOW: this is an experimental feature for now.
> 
> Part 1: fix section names over entire source (all arches).

Part 2: fix x86_64 vdso linker script to not produce
broken vdso image with gcc -ffunction-sections -fdata-sections.

Does not affect normal build.
--
vda

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--- linux-2.6.23-rc4.gc1/arch/x86_64/vdso/vdso.lds.S	Tue Sep  4 21:48:52 2007
+++ linux-2.6.23-rc4.gc2/arch/x86_64/vdso/vdso.lds.S	Tue Sep  4 21:49:17 2007
@@ -26,11 +26,11 @@
      is insufficient, ld -shared will barf.  Just increase it here.  */
   . = VDSO_PRELINK + VDSO_TEXT_OFFSET;
 
-  .text           : { *(.text) }		:text
+  .text           : { *(.text) *(.text.*) }	:text
   .text_ptr       : { *(.text_ptr) }		:text
   . = VDSO_PRELINK + 0x900;
-  .data           : { *(.data) }		:text
-  .bss            : { *(.bss) }			:text
+  .data           : { *(.data) *(.data.*) }	:text
+  .bss            : { *(.bss) *(.bss.*) }	:text
 
   .altinstructions : { *(.altinstructions) }			:text
   .altinstr_replacement  : { *(.altinstr_replacement) }	:text