riscv: Define TASK_SIZE_MAX for __access_ok() #728
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TASK_SIZE_MAX should be set to the largest userspace address under any runtime configuration. This optimizes the check in __access_ok(), which no longer needs to compute the current value of TASK_SIZE. It is still safe because addresses between TASK_SIZE and TASK_SIZE_MAX are invalid at the hardware level. This removes about half of the references to pgtable_l[45]_enabled. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
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Pull request for series with
subject: riscv: Define TASK_SIZE_MAX for __access_ok()
version: 1
url: https://patchwork.kernel.org/project/linux-riscv/list/?series=835045