Russell King - ARM Linux wrote:
Right. You are aware that there is already a mechanism for doing this in the generic kernel (obviously not)?
I am. Unfortunately, glibc fails to support this mechanism, as you say. I didn't want to start making such intrusive changes for our trivial need.
sys_reboot() with LINUX_REBOOT_CMD_RESTART2 takes a string in addition to the standard parameters. This string is passed into machine_restart() which we currently ignore. If LINUX_REBOOT_CMD_RESTART is used, this string is NULL. We could change machine_restart() to pass this parameter through to arm_pm_restart() and ultimately down to arch_reset().
Sure. With RESTART2, I could've even used the reboot notifier chain with an OMAP3-specific driver to store the string.
Are you suggesting to get rid of reboot_mode altogether? If not, could we still have the sysfs mechanism? A one-character reboot_mode would be plenty enough for us.
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