Messages in this thread | | | Date | Sun, 28 Nov 1999 08:51:25 +0100 (CET) | From | Henrik Olsen <> | Subject | Re: [patch] string.h speedup, cld-2.3.30-A1 |
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On Sat, 27 Nov 1999, Linus Torvalds wrote: > On Sat, 27 Nov 1999, Oliver Xymoron wrote: > > On Sat, 27 Nov 1999, Ingo Molnar wrote: > > > > > much of the remaining 284 cld's is still unjustified, because '*a = *b;' > > > type of structure copies are inlined by GCC. (GCC generates a cld because > > > user-space has to be prepared to be interrupted by uncooperative signal > > > handlers and the like). > > > > What!? A signal handler can change flags? Then there's a lot more for GCC > > to worry about than the direction flag.. > > A normal signal handler cannot change flags, because they will obviously > be restored on signal exit. > > However, I'm not sure that "longjmp()" does the same. You'd have to check > libc souces to see if setjmp saves the flags.. > > Linus Libc longjmp() does, glibc longjmp() doesn't.
-- Henrik Olsen, Dawn Solutions I/S URL=http://www.iaeste.dk/~henrik/ No, power off on shutdown is not SMP safe. It kind of happens to work on a lot of boards. If making that APM call reformats your disk and plays tetris on an SMP box, the bios vendor is within spec (if a little peculiar). Alan Cox, on the Linux Kernel list
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