Russell King (Oracle) b8bc0e50a3 ARM: add __arm_iomem_set_ro() to write-protect ioremapped area ...

__arm_iomem_set_ro() marks an ioremapped area read-only. This is
intended for use with __arm_ioremap_exec() to allow the kernel to
write some code into e.g. SRAM and then write-protect it so the
kernel doesn't complain about W+X mappings.

Tested-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

2021-10-19 10:30:56 +01:00

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