linux-stable.git/arch/powerpc/kernel/vmlinux.lds.S, branch v3.2

percpu: Always align percpu output section to PAGE_SIZE

2011-03-24T17:50:09+00:00

Percpu allocator honors alignment request upto PAGE_SIZE and both the
percpu addresses in the percpu address space and the translated kernel
addresses should be aligned accordingly.  The calculation of the
former depends on the alignment of percpu output section in the kernel
image.

The linker script macros PERCPU_VADDR() and PERCPU() are used to
define this output section and the latter takes @align parameter.
Several architectures are using @align smaller than PAGE_SIZE breaking
percpu memory alignment.

This patch removes @align parameter from PERCPU(), renames it to
PERCPU_SECTION() and makes it always align to PAGE_SIZE.  While at it,
add PCPU_SETUP_BUG_ON() checks such that alignment problems are
reliably detected and remove percpu alignment comment recently added
in workqueue.c as the condition would trigger BUG way before reaching
there.

For um, this patch raises the alignment of percpu area.  As the area
is in .init, there shouldn't be any noticeable difference.

This problem was discovered by David Howells while debugging boot
failure on mn10300.

Signed-off-by: Tejun Heo 
Acked-by: Mike Frysinger 
Cc: uclinux-dist-devel@blackfin.uclinux.org
Cc: David Howells 
Cc: Jeff Dike 
Cc: user-mode-linux-devel@lists.sourceforge.net

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

Rename .data.read_mostly to .data..read_mostly.

2010-03-03T10:26:00+00:00

Signed-off-by: Denys Vlasenko 
Signed-off-by: Michal Marek

Rename .data.page_aligned to .data..page_aligned.

2010-03-03T10:25:59+00:00

Signed-off-by: Tim Abbott 
Cc: Sam Ravnborg 
Signed-off-by: Denys Vlasenko 
Signed-off-by: Michal Marek

Rename .data.init_task to .data..init_task.

2010-03-03T10:25:58+00:00

Signed-off-by: Tim Abbott 
Cc: Sam Ravnborg 
Signed-off-by: Denys Vlasenko 
Signed-off-by: Michal Marek

Rename .data.cacheline_aligned to .data..cacheline_aligned.

2010-03-03T10:25:58+00:00

Signed-off-by: Tim Abbott 
Cc: Sam Ravnborg 
Signed-off-by: Denys Vlasenko 
Signed-off-by: Michal Marek

module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y

2009-12-15T05:58:34+00:00

powerpc applies relocations to the kcrctab.  They're absolute symbols,
but it's not completely unreasonable: other archs may too, but the
relocation is often 0.

http://lists.ozlabs.org/pipermail/linuxppc-dev/2009-November/077972.html

Inspired-by: Neil Horman 
Signed-off-by: Rusty Russell 
Tested-by: Neil Horman 
Acked-by: Paul Mackerras

powerpc: warning: allocated section `.data_nosave' not in segment

2009-10-14T05:58:39+00:00

We need to align before the output section. Having the align inside
the output section causes the linker to put some filler in there,
which makes it a non-empty section, but this section isn't assigned to
a segment so you get a warning from the linker.

Signed-off-by: Sean MacLennan 
Acked-by: Segher Boessenkool 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Cleanup linker script using new linker script macros.

2009-09-25T00:16:22+00:00

Signed-off-by: Tim Abbott 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: linuxppc-dev@ozlabs.org
Acked-by: Sam Ravnborg 
Signed-off-by: Linus Torvalds

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2009-09-15T16:51:09+00:00

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (134 commits)
  powerpc/nvram: Enable use Generic NVRAM driver for different size chips
  powerpc/iseries: Fix oops reading from /proc/iSeries/mf/*/cmdline
  powerpc/ps3: Workaround for flash memory I/O error
  powerpc/booke: Don't set DABR on 64-bit BookE, use DAC1 instead
  powerpc/perf_counters: Reduce stack usage of power_check_constraints
  powerpc: Fix bug where perf_counters breaks oprofile
  powerpc/85xx: Fix SMP compile error and allow NULL for smp_ops
  powerpc/irq: Improve nanodoc
  powerpc: Fix some late PowerMac G5 with PCIe ATI graphics
  powerpc/fsl-booke: Use HW PTE format if CONFIG_PTE_64BIT
  powerpc/book3e: Add missing page sizes
  powerpc/pseries: Fix to handle slb resize across migration
  powerpc/powermac: Thermal control turns system off too eagerly
  powerpc/pci: Merge ppc32 and ppc64 versions of phb_scan()
  powerpc/405ex: support cuImage via included dtb
  powerpc/405ex: provide necessary fixup function to support cuImage
  powerpc/40x: Add support for the ESTeem 195E (PPC405EP) SBC
  powerpc/44x: Add Eiger AMCC (AppliedMicro) PPC460SX evaluation board support.
  powerpc/44x: Update Arches defconfig
  powerpc/44x: Update Arches dts
  ...

Fix up conflicts in drivers/char/agp/uninorth-agp.c