ARM: domains: switch to keeping domain value in register

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Rather than modifying both the domain access control register and our
per-thread copy, modify only the domain access control register, and
use the per-thread copy to save and restore the register over context
switches.  We can also avoid the explicit initialisation of the
init thread_info structure.

This allows us to avoid needing to gain access to the thread information
at the uaccess control sites.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Russell King 2015-08-19 21:23:48 +01:00

parent d770e558e2

commit 1eef5d2f1b

4 changed files with 27 additions and 11 deletions

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20

arch/arm/include/asm/domain.h

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3

arch/arm/include/asm/thread_info.h

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2

arch/arm/kernel/entry-armv.S

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13

arch/arm/kernel/process.c

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