From: Linus Walleij Date: Sun, 19 Jun 2022 19:40:16 +0000 (+0100) Subject: ARM: 9212/1: domain: Modify Kconfig help text X-Git-Tag: v6.6.17~7002^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2bf6204240fddb22cc4940b9e3f40c538390212e;p=platform%2Fkernel%2Flinux-rpi.git ARM: 9212/1: domain: Modify Kconfig help text After the removal of set_fs() the reference to set_fs() is stale. Alter the helptext to reflect what the config option really does. Fixes: 8ac6f5d7f84b ("ARM: 9113/1: uaccess: remove set_fs() implementation") Acked-by: Arnd Bergmann Signed-off-by: Linus Walleij Signed-off-by: Russell King (Oracle) --- diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index a3a4589..fc439c2 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -631,7 +631,11 @@ config CPU_USE_DOMAINS bool help This option enables or disables the use of domain switching - via the set_fs() function. + using the DACR (domain access control register) to protect memory + domains from each other. In Linux we use three domains: kernel, user + and IO. The domains are used to protect userspace from kernelspace + and to handle IO-space as a special type of memory by assigning + manager or client roles to running code (such as a process). config CPU_V7M_NUM_IRQ int "Number of external interrupts connected to the NVIC"