• Tony Luck's avatar
    [IA64] Rationalize kernel mode alignment checking · b704882e
    Tony Luck authored
    Itanium processors can handle some misaligned data accesses. They
    also provide a mode where all such accesses are forced to trap. The
    kernel was schizophrenic about use of this mode:
    * Base kernel code ran in permissive mode where the only traps
      generated were from those cases that the h/w could not handle.
    * Interrupt, syscall and trap code ran in strict mode where all
      unaligned accesses caused traps to the 0x5a00 unaligned reference
    Use strict alignment checking throughout the kernel, but make
    sure that we continue to let user mode use more relaxed mode
    as the default.
    Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
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