Re: Reduce struct page by 8 bytes on 64bit

David S. Miller
2003-04-16T14:21:50Z

From: Andi Kleen <ak@muc.de>
Date: Wed, 16 Apr 2003 16:07:15 +0200

How so? Of course I could write an generic set_bit32, but the question
is if these bit operations would be still atomic on SMP and not conflict with
fields occuping the same 8 byte slot. I remember you flaming someone
some time ago because he used set_bit in an atomic fashion on a type smaller
than unsigned long for example.

It's OK if you align the pointer to 8 bytes, and subsequently the bit
offset as appropriate. :-)