Messages in this thread | | | Date | Thu, 15 Jul 1999 09:24:24 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [PATCH 2.2.10] Re: Problem with memmap file with SMP |
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On Thu, 15 Jul 1999, Stephen C. Tweedie wrote: > > 0 is fine. The case we are trying to detect is an alias between the > source buffer and the page cache, which is a kernel VA. 0 can never be > mistaken for a valid kernel address, so it's just fine. Any user > address would be OK --- it's only with kernel addresses that we'd have > to be careful.
0 wouldn't be acceptable for 2.3.x, as it CAN be a kernel address on a number of machines. But as the problem doesn't exist in 2.3.x anyway I guess that is a non-issue.
It's a singularly ugly fix, regardless. I would never let code like that near any of my kernels, but Alan is the one who gets to decide in the stable tree.
Linus
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