linker script: unify usage of discard definition
authorTejun Heo <tj@kernel.org>
Thu, 9 Jul 2009 02:27:40 +0000 (11:27 +0900)
committerTejun Heo <tj@kernel.org>
Thu, 9 Jul 2009 02:27:40 +0000 (11:27 +0900)
commit023bf6f1b8bf58dc4da7f0dc1cf4787b0d5297c1
tree780331cadf207ced67dfcdf36a6479dc0e3d3c04
parent1dcdd0911b5553f0282ce8525773955b59a56919
linker script: unify usage of discard definition

Discarded sections in different archs share some commonality but have
considerable differences.  This led to linker script for each arch
implementing its own /DISCARD/ definition, which makes maintaining
tedious and adding new entries error-prone.

This patch makes all linker scripts to move discard definitions to the
end of the linker script and use the common DISCARDS macro.  As ld
uses the first matching section definition, archs can include default
discarded sections by including them earlier in the linker script.

ia64 is notable because it first throws away some ia64 specific
subsections and then include the rest of the sections into the final
image, so those sections must be discarded before the inclusion.

defconfig compile tested for x86, x86-64, powerpc, powerpc64, ia64,
alpha, sparc, sparc64 and s390.  Michal Simek tested microblaze.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Tested-by: Michal Simek <monstr@monstr.eu>
Cc: linux-arch@vger.kernel.org
Cc: Michal Simek <monstr@monstr.eu>
Cc: microblaze-uclinux@itee.uq.edu.au
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Tony Luck <tony.luck@intel.com>
25 files changed:
arch/alpha/kernel/vmlinux.lds.S
arch/avr32/kernel/vmlinux.lds.S
arch/blackfin/kernel/vmlinux.lds.S
arch/cris/kernel/vmlinux.lds.S
arch/frv/kernel/vmlinux.lds.S
arch/h8300/kernel/vmlinux.lds.S
arch/ia64/kernel/vmlinux.lds.S
arch/m32r/kernel/vmlinux.lds.S
arch/m68k/kernel/vmlinux-std.lds
arch/m68k/kernel/vmlinux-sun3.lds
arch/m68knommu/kernel/vmlinux.lds.S
arch/microblaze/kernel/vmlinux.lds.S
arch/mips/kernel/vmlinux.lds.S
arch/mn10300/kernel/vmlinux.lds.S
arch/parisc/kernel/vmlinux.lds.S
arch/powerpc/kernel/vmlinux.lds.S
arch/s390/kernel/vmlinux.lds.S
arch/sh/kernel/vmlinux.lds.S
arch/sparc/kernel/vmlinux.lds.S
arch/um/include/asm/common.lds.S
arch/um/kernel/dyn.lds.S
arch/um/kernel/uml.lds.S
arch/x86/kernel/vmlinux.lds.S
arch/xtensa/kernel/vmlinux.lds.S
include/asm-generic/vmlinux.lds.h