arm64: uaccess: remove addr_limit_user_check()

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Now that set_fs() is gone, addr_limit_user_check() is redundant. Remove
the checks and associated thread flag.

To ensure that _TIF_WORK_MASK can be used as an immediate value in an
AND instruction (as it is in `ret_to_user`), TIF_MTE_ASYNC_FAULT is
renumbered to keep the constituent bits of _TIF_WORK_MASK contiguous.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201202131558.39270-11-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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This commit is contained in:

Mark Rutland 2020-12-02 13:15:56 +00:00 • committed by Catalin Marinas

parent 3d2403fd10

commit b5a5a01d8e

2 changed files with 2 additions and 7 deletions

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6

arch/arm64/include/asm/thread_info.h

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3

arch/arm64/kernel/signal.c

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