linux.git/arch/mips/kernel/vmlinux.lds.S, branch v2.6.39

MIPS: Rename .data..mostly and properly handle it in linker script

2011-05-10T17:15:24+00:00

Signed-off-by: Ralf Baechle

percpu: align percpu readmostly subsection to cacheline

2011-01-25T13:26:50+00:00

Currently percpu readmostly subsection may share cachelines with other
percpu subsections which may result in unnecessary cacheline bounce
and performance degradation.

This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR()
linker macros, makes each arch linker scripts specify its cacheline
size and use it to align percpu subsections.

This is based on Shaohua's x86 only patch.

Signed-off-by: Tejun Heo 
Cc: Shaohua Li

MIPS: Add generic support for multiple machines within a single kernel

2011-01-18T18:30:21+00:00

This patch adds a generic solution to support multiple machines based on
a given SoC within a single kernel image. It is implemented already for
several other architectures but MIPS has no generic support for that yet.

[Ralf: This competes with DT but DT is a much more complex solution and this
code has been used by OpenWRT for a long time so for now DT is a bad reason
to stop the merge but longer term this should be migrated to DT.]

Signed-off-by: Gabor Juhos 
Cc: linux-mips@linux-mips.org
Cc: kaloz@openwrt.org
Cc: Luis R. Rodriguez 
Cc: Cliff Holden 
Patchwork: https://patchwork.linux-mips.org/patch/1814/
Signed-off-by: Ralf Baechle

MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS

2009-12-17T01:57:24+00:00

This patch add a new section for MIPS to record the block of the hardirq
handling for function graph tracer(print_graph_irq) via adding the
__irq_entry annotation to the the entrypoints of the hardirqs(the block
with irq_enter()...irq_exit()).

Thanks goes to Steven & Frederic Weisbecker for their feedbacks.

Signed-off-by: Wu Zhangjin 
Cc: Steven Rostedt 
Cc: Nicholas Mc Guire 
Cc: zhangfx@lemote.com
Cc: Wu Zhangjin 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: Frederic Weisbecker 
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Reviewed-by: Frederic Weisbecker 
Patchwork: http://patchwork.linux-mips.org/patch/676/
Signed-off-by: Ralf Baechle

mips: fix build of vmlinux.lds

2009-09-25T17:49:27+00:00

Commit 51b563fc93c8cb5bff1d67a0a71c374e4a4ea049 ("arm, cris, mips,
sparc, powerpc, um, xtensa: fix build with bash 4.0") removed a few
CPPFLAGS with vital include paths necessary to build vmlinux.lds
on MIPS, and moved the calculation of the 'jiffies' symbol
directly to vmlinux.lds.S but forgot to change make ifdef/... to
cpp macros.

Signed-off-by: Manuel Lauss 
[sam: moved assignment of CPPFLAGS arch/mips/kernel/Makefile]
Signed-off-by: Sam Ravnborg 
Acked-by: Dmitri Vorobiev

arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0

2009-09-20T10:28:22+00:00

Albin Tonnerre  reported:

    Bash 4 filters out variables which contain a dot in them.
    This happends to be the case of CPPFLAGS_vmlinux.lds.
    This is rather unfortunate, as it now causes
    build failures when using SHELL=/bin/bash to compile,
    or when bash happens to be used by make (eg when it's /bin/sh)

Remove the common definition of CPPFLAGS_vmlinux.lds by
pushing relevant stuff to either Makefile.build or the
arch specific kernel/Makefile where we build the linker script.

This is also nice cleanup as we move the information out where
it is used.

Notes for the different architectures touched:

arm - we use an already exported symbol
cris - we use a config symbol aleady available
       [Not build tested]
mips - the jiffies complexity has moved to vmlinux.lds.S where we need it.
       Added a few variables to CPPFLAGS - they are only used by
       the linker script.
       [Not build tested]
powerpc - removed assignment that is not needed
          [not build tested]
sparc - simplified it using $(BITS)
um - introduced a few new exported variables to deal with this
xtensa - added options to CPP invocation
         [not build tested]

Cc: Albin Tonnerre 
Cc: Russell King 
Cc: Mikael Starvik 
Cc: Jesper Nilsson 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: "David S. Miller" 
Cc: Jeff Dike 
Cc: Chris Zankel 
Signed-off-by: Sam Ravnborg

MIPS: Clean up linker script using new linker script macros.

2009-09-17T18:07:49+00:00

This patch results in fewer output sections and in some data being
reordered, but should have no functional impact.

Signed-off-by: Nelson Elhage 
Signed-off-by: Tim Abbott 
Signed-off-by: Ralf Baechle

MIPS: Use PAGE_SIZE in assembly instead of _PAGE_SIZE.

2009-09-17T18:07:48+00:00

Now that PAGE_SIZE is available to assembly directly, there is no need
to separately expose it as _PAGE_SIZE through asm-offsets.

In addition, remove _PAGE_SHIFT from asm-offsets, since it was never
needed, and is not used anywhere.

Signed-off-by: Nelson Elhage 
Signed-off-by: Tim Abbott 
Signed-off-by: Ralf Baechle

linker script: unify usage of discard definition

2009-07-09T02:27:40+00:00

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 
Acked-by: Paul Mundt 
Acked-by: Mike Frysinger 
Tested-by: Michal Simek 
Cc: linux-arch@vger.kernel.org
Cc: Michal Simek 
Cc: microblaze-uclinux@itee.uq.edu.au
Cc: Sam Ravnborg 
Cc: Tony Luck

linker script: throw away .discard section

2009-06-24T06:13:38+00:00

x86 throws away .discard section but no other archs do.  Also,
.discard is not thrown away while linking modules.  Make every arch
and module linking throw it away.  This will be used to define dummy
variables for percpu declarations and definitions.

This patch is based on Ivan Kokshaysky's alpha percpu patch.

[ Impact: always throw away everything in .discard ]

Signed-off-by: Tejun Heo 
Cc: Ivan Kokshaysky 
Cc: Richard Henderson 
Cc: Russell King 
Cc: Haavard Skinnemoen 
Cc: Bryan Wu 
Cc: Mikael Starvik 
Cc: Jesper Nilsson 
Cc: David Howells 
Cc: Yoshinori Sato 
Cc: Tony Luck 
Cc: Hirokazu Takata 
Cc: Geert Uytterhoeven 
Cc: Michal Simek 
Cc: Ralf Baechle 
Cc: Kyle McMartin 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Paul Mundt 
Cc: David S. Miller 
Cc: Jeff Dike 
Cc: Chris Zankel 
Cc: Rusty Russell 
Cc: Ingo Molnar