From: Bastian Hecht <hechtb@googlemail.com>
To: linux-sh@vger.kernel.org
Subject: [PATCH 0/3] Use generic helper scu_power_mode()
Date: Wed, 24 Oct 2012 08:54:15 +0000 [thread overview]
Message-ID: <1351068858-7255-1-git-send-email-hechtb@gmail.com> (raw)
The shmobile series implements its own code for setting the SCU power
register of the ARM MPCore. It uses 32-bit wide access and thus needs
locking as multiple CPUs might access it simultaneously for change. There is
already a small helper function that avoids the overhead by using 8-bit
wide access: As every CPU only accesses its own field we can drop the
lock and use it.
Bastian Hecht (3):
ARM: shmobile: emev2: Replace modify_scu_cpu_psr with scu_power_mode
ARM: shmobile: sh73a0: Replace modify_scu_cpu_psr with scu_power_mode
ARM: shmobile: r8a7779: Replace modify_scu_cpu_psr with
scu_power_mode
arch/arm/mach-shmobile/smp-emev2.c | 22 ++--------------------
arch/arm/mach-shmobile/smp-r8a7779.c | 25 +++----------------------
arch/arm/mach-shmobile/smp-sh73a0.c | 23 ++---------------------
3 files changed, 7 insertions(+), 63 deletions(-)
--
1.7.9.5
next reply other threads:[~2012-10-24 8:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-24 8:54 Bastian Hecht [this message]
2012-10-25 0:29 ` [PATCH 0/3] Use generic helper scu_power_mode() Simon Horman
2012-10-25 10:52 ` Bastian Hecht
2012-10-25 10:58 ` Bastian Hecht
2012-10-25 10:58 ` [PATCH 1/3] ARM: shmobile: emev2: Replace modify_scu_cpu_psr with scu_power_mode Bastian Hecht
2012-10-25 10:58 ` [PATCH 2/3] ARM: shmobile: sh73a0: " Bastian Hecht
2012-10-25 10:58 ` [PATCH 3/3] ARM: shmobile: r8a7779: " Bastian Hecht
2012-10-28 3:11 ` [PATCH 0/3] Use generic helper scu_power_mode() Simon Horman
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