Alan, please, replace the unmap_buffer() in fs/buffer.c with
static void unmap_buffer(struct buffer_head * bh)
{
if (buffer_mapped(bh)) {
mark_buffer_clean(bh);
lock_buffer(bh);
clear_bit(BH_Uptodate, &bh->b_state);
clear_bit(BH_Mapped, &bh->b_state);
clear_bit(BH_Req, &bh->b_state);
clear_bit(BH_New, &bh->b_state);
unlock_buffer(bh);
}
}
Current tree has wait_on_buffer() instead of lock/unlock, which is racey on
SMP.
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