linux.git/arch/powerpc/kernel/vmlinux.lds.S, branch v2.6.30

powerpc: Explicit alignment for .data.cacheline_aligned

2009-05-18T05:19:05+00:00

I don't think anything guarantees that the objects in data.page_aligned
are a multiple of PAGE_SIZE, thus the section may end on any boundary.

So the following section, .data.cacheline_aligned needs an explicit
alignment.

Signed-off-by: Benjamin Herrenschmidt

powerpc: Revert switch to TEXT_TEXT in linker script

2009-04-28T22:55:14+00:00

Commit edada399 broke the build on 64-bit powerpc because it moved the
__ftr_alt_* sections of a file away from the .text section, causing
link failures due to relative conditional branch targets being too far
away from the branch instructions.  This happens on pretty much all
64-bit powerpc configs.

This change reverts commit edada399 while preserving the update from
the *.refok sections to .ref.text that has happened since.

Signed-off-by: Tim Abbott 
Requested-by: Paul Mackerras 
Signed-off-by: Linus Torvalds

powerpc: Use TEXT_TEXT macro in linker script.

2009-04-28T02:51:58+00:00

Rather than adding .ref.text to the powerpc linker script so that we
can use __REF on the powerpc architecture, it seems simpler to switch
to using the generic TEXT_TEXT macro.

Signed-off-by: Tim Abbott 
Cc: Benjamin Herrenschmidt 
Acked-by: Sam Ravnborg 
Signed-off-by: Linus Torvalds

powerpc: convert to use __HEAD and HEAD_TEXT macros.

2009-04-26T16:20:38+00:00

This has the consequence of changing the section name use for head
code from ".text.head" to ".head.text".  Since this commit changes all
users in the architecture, this change should be harmless.

Signed-off-by: Tim Abbott 
Cc: Benjamin Herrenschmidt 
Acked-by: Sam Ravnborg 
Signed-off-by: Linus Torvalds

Merge commit 'origin/master' into next

2009-03-30T03:04:53+00:00

Manual merge of:
	arch/powerpc/include/asm/elf.h
	drivers/i2c/busses/i2c-mpc.c

linker script: define __per_cpu_load on all SMP capable archs

2009-03-10T07:27:48+00:00

Impact: __per_cpu_load available on all SMP capable archs

Percpu now requires three symbols to be defined - __per_cpu_load,
__per_cpu_start and __per_cpu_end.  There were three archs which
didn't have it.  Update them as follows.

* powerpc: can use generic PERCPU() macro.  Compile tested for
  powerpc32, compile/boot tested for powerpc64.

* ia64: can use generic PERCPU_VADDR() macro.  __phys_per_cpu_start is
  identical to __per_cpu_load.  Compile tested and symbol table looks
  identical after the change except for the additional __per_cpu_load.

* arm: added explicit __per_cpu_load definition.  Currently uses
  unified .init output section so can't use the generic macro.  Dunno
  whether the unified .init ouput section is required by arch
  peculiarity so I left it alone.  Please break it up and use PERCPU()
  if possible.

Signed-off-by: Tejun Heo 
Cc: Benjamin Herrenschmidt 
Cc: Pat Gefre 
Cc: Russell King

powerpc64: port of the function graph tracer

2009-02-22T23:48:53+00:00

This is a port of the function graph tracer that was written by
Frederic Weisbecker for the x86.

This only works for PPC64 at the moment and only for static tracing.
PPC32 and dynamic function graph tracing support will come later.

The trace produces a visual calling of functions:

 # tracer: function_graph
 #
 # CPU  DURATION                  FUNCTION CALLS
 # |     |   |                     |   |   |   |
  0)   2.224 us    |                        }
  0) ! 271.024 us  |                      }
  0) ! 320.080 us  |                    }
  0) ! 324.656 us  |                  }
  0) ! 329.136 us  |                }
  0)               |                .put_prev_task_fair() {
  0)               |                  .update_curr() {
  0)   2.240 us    |                    .update_min_vruntime();
  0)   6.512 us    |                  }
  0)   2.528 us    |                  .__enqueue_entity();
  0) + 15.536 us   |                }
  0)               |                .pick_next_task_fair() {
  0)   2.032 us    |                  .__pick_next_entity();
  0)   2.064 us    |                  .__clear_buddies();
  0)               |                  .set_next_entity() {
  0)   2.672 us    |                    .__dequeue_entity();
  0)   6.864 us    |                  }

Geoff Lavand tested on PS3.

Tested-by: Geoff Levand 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Steven Rostedt 
Signed-off-by: Benjamin Herrenschmidt

Merge branch 'x86/mm' into core/percpu

2009-01-21T09:39:51+00:00

Conflicts:
	arch/x86/mm/fault.c

linker script: add missing .data.percpu.page_aligned

2009-01-17T06:26:32+00:00

arm, arm/mach-integrator and powerpc were missing
.data.percpu.page_aligned in their percpu output section definitions.
Add it.

Signed-off-by: Tejun Heo

powerpc: Make dummy section a valid note header

2009-01-13T03:47:58+00:00

We are declaring the dummy section (used to work around a binutils
bug) as PT_NOTE, but we don't have enough bytes for it to be a valid
note header, and kexec userspace complains:

Warning: Elf Note name is not null terminated
Warning: append= option is not passed. Using the first kernel root partition
Warning: Elf Note name is not null terminated

Instead of using the arbitray value 0xf177 (aka "fill"), declare a
no-name no-description note of type 0.

Signed-off-by: Milton Miller 
Signed-off-by: Benjamin Herrenschmidt