kernel/git/stable/linux.git/arch/arm/mach-prima2/hotplug.c, branch master

ARM: remove sirf prima2/atlas platforms

2021-01-20T08:41:37+00:00

The SiRF Prima2 and Atlas platform code was contributed by Cambridge Silicon Radio (CSR) after aquiring the original SiRF company, and maintained by Barry Song. CSR was subsequently acquired by Qualcomm, who no longer have an interest in maintaining the SoC platform but instead have released more recent SoCs for the same market in the Snapdragon family. As Barry is no longer working for the company, nobody else there wants to maintain it, and there are no third-party users, the best way forward seems to be to completely remove it. Thanks to Barry for maintaining the platform for the past ten years. Cc: Barry Song Link: https://lore.kernel.org/lkml/c969392572604b98bcb3be44048c3165@hisilicon.com/ Signed-off-by: Arnd Bergmann

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 4

2019-05-21T09:28:40+00:00

Based on 1 normalized pattern(s): licensed under gplv2 or later extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 118 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Jilayne Lovejoy Reviewed-by: Steve Winslow Reviewed-by: Allison Randal Reviewed-by: Kate Stewart Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.961286471@linutronix.de Signed-off-by: Greg Kroah-Hartman

ARM: smp: remove arch-provided "pen_release"

2019-02-01T22:05:23+00:00

Consolidating the "pen_release" stuff amongst the various SoC implementations gives credence to having a CPU holding pen for secondary CPUs. However, this is far from the truth. Many SoC implementations cargo-cult copied various bits of the pen release implementation from the initial Realview/Versatile Express implementation without understanding what it was or why it existed. The reason it existed is because these are _development_ platforms, and some board firmware is unable to individually control the startup of secondary CPUs. Moreover, they do not have a way to power down or reset secondary CPUs for hot-unplug. Hence, the pen_release implementation was designed for ARM Ltd's development platforms to provide a working implementation, even though it is very far from what is required. It was decided a while back to reduce the duplication by consolidating the "pen_release" variable, but this only made the situation worse - we have ended up with several implementations that read this variable but do not write it - again, showing the cargo-cult mentality at work, lack of proper review of new code, and in some cases a lack of testing. While it would be preferable to remove pen_release entirely from the kernel, this is not possible without help from the SoC maintainers, which seems to be lacking. However, I want to remove pen_release from arch code to remove the credence that having it gives. This patch removes pen_release from the arch code entirely, adding private per-SoC definitions for it instead, and explicitly stating that write_pen_release() is cargo-cult copied and should not be copied any further. Rename write_pen_release() in a similar fashion as well. Signed-off-by: Russell King

ARM: Remove __ref on hotplug cpu die path

2015-10-22T16:55:03+00:00

Now that __cpuinit has been removed, the __ref markings on these functions are useless. Remove them. This also reduces the size of the multi_v7_defconfig image: $ size before after text data bss dec hex filename 12683578 1470996 348904 14503478 dd4e36 before 12683274 1470996 348904 14503174 dd4d06 after presumably because now we don't have to jump to code in the .ref.text section and/or the noinline marking is removed. Cc: Shiraz Hashim Cc: Stephen Warren Cc: Alexandre Courbot Cc: Lorenzo Pieralisi Cc: Will Deacon Cc: Cc: Cc: Cc: Acked-by: Tony Lindgren Acked-by: Barry Song Acked-by: Andy Gross Acked-by: Viresh Kumar Acked-by: Thierry Reding Acked-by: Linus Walleij Acked-by: Sudeep Holla Acked-by: Mark Rutland Signed-off-by: Stephen Boyd Signed-off-by: Olof Johansson

ARM: cpu hotplug: remove majority of cache flushing from platforms

2013-04-18T19:08:04+00:00

Remove the majority of cache flushing calls from the individual platform files. This is now handled by the core code. Signed-off-by: Russell King

ARM: prima2: fix __init section for cpu hotplug

2013-02-14T13:36:35+00:00

The code in arch/arm/mach-prima2/headsmp.S is used for both boot time initialization and for cpu hotplug, so it must not be discarded after the initial boot is complete. This replaces the __INIT annotation with __CPUINIT, and marks the sirfsoc_cpu_die as __ref to annotate that it correctly uses the sections. Without this patch, building prima2_defconfig results in: WARNING: arch/arm/mach-prima2/built-in.o(.cpuinit.text+0x130): Section mismatch in reference from the function sirfsoc_boot_secondary() to the function .init.text:sirfsoc_secondary_startup() The function __cpuinit sirfsoc_boot_secondary() references a function __init sirfsoc_secondary_startup(). If sirfsoc_secondary_startup is only used by sirfsoc_boot_secondary then annotate sirfsoc_secondary_startup with a matching annotation. Signed-off-by: Arnd Bergmann Cc: Barry Song

ARM: PRIMA2: add new SiRFmarco SMP SoC infrastructures

2013-01-22T11:53:27+00:00

this patch adds tick timer, smp entries and generic DT machine for SiRFmarco dual-core SMP chips. with the added marco, we change the defconfig, using the same defconfig, we get a zImage which can work on both prima2 and marco. Signed-off-by: Barry Song Cc: Mark Rutland