linux-kernel - [PATCH v2 0/8] Mark literal strings in __init / _

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Date:	Sat, 12 Jul 2014 16:43:24 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	Joe Perches <joe@...ches.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Mathias Krause <minipli@...glemail.com>
Subject: [PATCH v2 0/8] Mark literal strings in __init / __exit code

This is v2 of the patch series initially posted here:

  https://lkml.org/lkml/2014/6/22/149

I've integrated Joe's idea of also providing printk_init() /
printk_exit() wrappers for code that cannot (or doesn't want to) be
converted to the pi_*() / pe_*() wrappers.

Patches 4 and 5 are cleanup patches I stumbled over while changing the
corresponding code to make use of the new pi_*() helpers.

This version addresses the symbol filtering issue, by filtering the
pseudo symbols in kallsyms (patch 8). This removes them even in the
KALLSYMS_ALL case.

I've changed a few more files, pushing up the memory moved from .rodata
to .init.rodata to ~3 kB. This should free up a page after init for
almost any x86 system.

Comments?


Mathias Krause (8):
  init.h: Add __init_str / __exit_str macros
  printk: Provide pi_<level> / pe_<level> macros for __init / __exit
    code
  x86, acpi: Mark __init strings as such
  x86, mm: Make x86_init.memory_setup() return a const char *
  x86, mm: early_panic() - pass on the message as string
  x86, mm: e820 - mark __init strings as such
  x86: setup - mark __init strings as such
  kallsyms: exclude pseudo symbols for __init / __exit strings

 arch/x86/include/asm/e820.h     |    4 +-
 arch/x86/include/asm/x86_init.h |    2 +-
 arch/x86/kernel/acpi/boot.c     |  162 ++++++++++++++++++---------------------
 arch/x86/kernel/acpi/sleep.c    |   17 ++--
 arch/x86/kernel/e820.c          |   95 +++++++++++------------
 arch/x86/kernel/setup.c         |   70 ++++++++---------
 arch/x86/lguest/boot.c          |    2 +-
 arch/x86/xen/setup.c            |    4 +-
 arch/x86/xen/xen-ops.h          |    4 +-
 include/linux/init.h            |   23 ++++++
 include/linux/printk.h          |   59 ++++++++++++++
 scripts/kallsyms.c              |   13 ++++
 12 files changed, 267 insertions(+), 188 deletions(-)

-- 
1.7.10.4

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