| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.18 152/231] ARM: 9212/1: domain: Modify Kconfig help text | Date | Tue, 19 Jul 2022 13:53:57 +0200 |
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From: Linus Walleij <linus.walleij@linaro.org>
[ Upstream commit 2bf6204240fddb22cc4940b9e3f40c538390212e ]
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> Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/arm/mm/Kconfig | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index d30ee26ccc87..6284914f4361 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" -- 2.35.1
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