Re: [PATCH] ARC: uaccess: get_user to zero out dest in cause of fault
From: "H. Peter Anvin" <hpa@zytor.com>
Date: 2016-08-22 23:51:39
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On August 22, 2016 4:48:00 PM PDT, Linus Torvalds [off-list ref] wrote:
On Mon, Aug 22, 2016 at 4:12 PM, H. Peter Anvin [off-list ref] wrote:quoted
How about the gcc native __builtin_setjmp stuff which is supposedlybetter? How new is it? The whole point was that we'd not have to worry and wait for gcc features.. glibc doesn't use it, which worries me a bit. Has it ever gotten any use/testing? But yes, the compiler could do better. If we can rely on it, and it doesn't do stupid things (like have signal state etc crap - glibc seems to just alias "setjmp" to "sigsetjmp" with a "didn't save signals" flag) Linus
We can always fall back on the classic implementation for older gcc, just like we do for so many other features. -- Sent from my Android device with K-9 Mail. Please excuse brevity and formatting.