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Currently, we have mixed code placement between .head.text and .text
depends on configuration we are building:
_text M R(UP) R(SMP)
======================================================
__setup_mpu __HEAD __HEAD text
__after_proc_init __HEAD __HEAD text
__mmap_switched text text text
We are going to support another variant of MPU which is different to
PMSAv7 in sense overlapping MPU regions are not allowed, so this patch
makes boundaries between these sections precise and consistent:
_text M R(UP) R(SMP)
======================================================
__setup_mpu __HEAD __HEAD __HEAD
__after_proc_init text text text
__mmap_switched text text text
Additionally, it paves a path to postpone MPU activation till
__after_proc_init where we do set SCTLR anyway and can return
directly to __mmap_switched.
Tested-by: Szemz? András <sza@esh.hu>
Tested-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
22893aa22b