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It seems that the cacheflush syscall got broken when PAN for LPAE was implemented. User access was not enabled around the cache maintenance instructions, causing them to fault. Fixes: 7af5b90 ("ARM: 9358/2: Implement PAN for LPAE by TTBR0 page table walks disablement") Reported-by: Michał Pecio <michal.pecio@gmail.com> Tested-by: Michał Pecio <michal.pecio@gmail.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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