linux-kernel - [PATCH 0/8] powerpc: use jump label for {cpu,mmu}_has

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Message-Id: <1440072876-8321-1-git-send-email-haokexin@gmail.com>
Date:	Thu, 20 Aug 2015 20:14:28 +0800
From:	Kevin Hao <haokexin@...il.com>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH 0/8] powerpc: use jump label for {cpu,mmu}_has_feature()

Hi,

I have tried to change the {cpu,mmu}_has_feature() to use jump label two yeas
ago [1]. But that codes seem a bit ugly. This is a reimplementation by moving the
jump_label_init() much earlier so the jump label can be used in a very earlier
stage. Boot test on p4080ds, t2080rdb and powermac (qemu). This patch series
is against linux-next.

[1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2013-September/111026.html

Kevin Hao (8):
  jump_label: no need to acquire the jump_label_mutex in
    jump_lable_init()
  jump_label: make it possible for the archs to invoke jump_label_init()
    much earlier
  jump_label: introduce DEFINE_STATIC_KEY_{TRUE,FALSE}_ARRAY macros
  powerpc: invoke jump_label_init() in a much earlier stage
  powerpc: kill mfvtb()
  powerpc: move the cpu_has_feature to a separate file
  powerpc: use the jump label for cpu_has_feature
  powerpc: use jump label for mmu_has_feature

 arch/powerpc/include/asm/cacheflush.h   |  1 +
 arch/powerpc/include/asm/cpufeatures.h  | 34 +++++++++++++++++++++++++++++++++
 arch/powerpc/include/asm/cputable.h     | 16 ++++++++--------
 arch/powerpc/include/asm/cputime.h      |  1 +
 arch/powerpc/include/asm/dbell.h        |  1 +
 arch/powerpc/include/asm/dcr-native.h   |  1 +
 arch/powerpc/include/asm/mman.h         |  1 +
 arch/powerpc/include/asm/mmu.h          | 29 ++++++++++++++++++++++++++++
 arch/powerpc/include/asm/reg.h          |  9 ---------
 arch/powerpc/include/asm/time.h         |  3 ++-
 arch/powerpc/include/asm/xor.h          |  1 +
 arch/powerpc/kernel/align.c             |  1 +
 arch/powerpc/kernel/cputable.c          | 33 ++++++++++++++++++++++++++++++++
 arch/powerpc/kernel/irq.c               |  1 +
 arch/powerpc/kernel/process.c           |  1 +
 arch/powerpc/kernel/setup-common.c      |  1 +
 arch/powerpc/kernel/setup_32.c          |  5 +++++
 arch/powerpc/kernel/setup_64.c          |  4 ++++
 arch/powerpc/kernel/smp.c               |  1 +
 arch/powerpc/platforms/cell/pervasive.c |  1 +
 arch/powerpc/xmon/ppc-dis.c             |  1 +
 include/linux/jump_label.h              |  6 ++++++
 kernel/jump_label.c                     |  5 +++--
 23 files changed, 137 insertions(+), 20 deletions(-)
 create mode 100644 arch/powerpc/include/asm/cpufeatures.h

-- 
2.1.0

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