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During kexec, we will go through kernel_kexec() -> syscore_suspend() if CONFIG_KEXEC_JUMP is set, if not, down the road we end-up calling kernel_restart_prepare() which invokes reboot notifiers with SYS_RESTART. We register a reboot notifier to make sure that the B15 read-ahead cache is disabled, since it is another level of instruction and data cache, and we want to avoid any potential side effects with booting a new kernel with such a cache still turned on. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.