arm64: mm: drop VM_FAULT_BADMAP/VM_FAULT_BADACCESS

arm64: mm: drop VM_FAULT_BADMAP/VM_FAULT_BADACCESS

Patch series "mm: remove arch's private VM_FAULT_BADMAP/BADACCESS", v2.

Directly set SEGV_MAPRR or SEGV_ACCERR for arm/arm64 to remove the last
two arch's private vm_fault reasons.

This patch (of 2):

If bad map or access, directly set si_code to SEGV_MAPRR or SEGV_ACCERR,
also set fault to 0 and goto error handling, which make us to drop the
arch's special vm fault reason.

Link: https://lkml.kernel.org/r/20240411130925.73281-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20240411130925.73281-2-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Aishwarya TCV <aishwarya.tcv@arm.com>
Cc: Cristian Marussi <cristian.marussi@arm.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>