[PATCH v4 04/18] arm64: Do not enable uaccess for flush_icache_range

[Catalin Marinas]

On Mon, May 24, 2021 at 09:29:47AM +0100, Fuad Tabba wrote:
> __flush_icache_range works on kernel addresses, and doesn't need
> uaccess. The existing code is a side-effect of its current
> implementation with __flush_cache_user_range fallthrough.
> 
> Instead of fallthrough to share the code, use a common macro for
> the two where the caller specifies an optional fixup label if
> user access is needed. If provided, this label would be used to
> generate an extable entry.
> 
> Simplify the code to use dcache_by_line_op, instead of
> replicating much of its functionality.
> 
> No functional change intended.
> Possible performance impact due to the reduced number of
> instructions.
> 
> Reported-by: Catalin Marinas <catalin.marinas at arm.com>
> Reported-by: Will Deacon <will at kernel.org>
> Reported-by: Mark Rutland <mark.rutland at arm.com>
> Link: https://lore.kernel.org/linux-arch/20200511110014.lb9PEahJ4hVOYrbwIb_qUHXyNy9KQzNFdb_I3YlzY6A@z/
> Link: https://lore.kernel.org/linux-arm-kernel/20210521121846.GB1040@C02TD0UTHF1T.local/
> Signed-off-by: Fuad Tabba <tabba at google.com>

Wrong version, acking again here:

Acked-by: Catalin Marinas <catalin.marinas at arm.com>