From: Steven Rostedt <rostedt@goodmis.org>
Subject: [RFC][PATCH] extable: Make sure all archs define _sdata
Date: Thu, 19 May 2011 21:34:58 -0400

Can I get an Acked-by (or comment) from the following Maintainers:

  alpha
  m32r
  m68k
  mips
  parisc

Ingo has discovered that one of my patches broke the builds of these
architectures. Although he added a quick fix, this patch supplies the
proper fix and touches the affected architectures. Please review and Ack
(or NACK with guidance) this patch.

-- Steve

A new utility function is used to determine if a passed in address is
part of core kernel data or not. It may or may not return true for RO
data, but this utility must work for RW data. Thus both _sdata and
_edata must be defined and continuous, without .init sections that may
later be freed and replaced by volatile memory (memory that can be
freed).

This utility function is used to determine if data is safe from ever
being freed. Thus it should return true for all RW global data that is
not in a module or has been allocated, or false otherwise.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
----
 arch/alpha/kernel/vmlinux.lds.S   |    1 +
 arch/m32r/kernel/vmlinux.lds.S    |    1 +
 arch/m68k/kernel/vmlinux-std.lds  |    2 ++
 arch/m68k/kernel/vmlinux-sun3.lds |    1 +
 arch/mips/kernel/vmlinux.lds.S    |    1 +
 arch/parisc/kernel/vmlinux.lds.S  |    3 +++
 kernel/extable.c                  |   12 +++++++++++-
 7 files changed, 20 insertions(+), 1 deletion(-)

Acked-by: Hirokazu Takata <redacted>

Thank you.