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| author |   Linus Walleij <linus.walleij@linaro.org> | 2022-06-19 20:40:16 +0100 |
|---|---|---|
| committer |   Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-07-06 22:44:49 +0100 |
| commit | 2bf6204240fddb22cc4940b9e3f40c538390212e (patch) | |
| tree | 6e12235dc60c157a67ee6a64e944f5314055f561 /arch/arm/mm/Kconfig | |
| parent | ARM: 9211/1: domain: drop modify_domain() (diff) | |
| download | linux-dev-2bf6204240fddb22cc4940b9e3f40c538390212e.tar.xz linux-dev-2bf6204240fddb22cc4940b9e3f40c538390212e.zip | |
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 <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/mm/Kconfig | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index a3a4589ec73b..fc439c2c16f8 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" |