From: Florian Weimer via Libc-alpha <libc-alpha@sourceware.org>
To: "H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>
Subject: Re: [PATCH] <sys/platform/x86.h>: Remove the C preprocessor magic
Date: Wed, 20 Jan 2021 12:23:38 +0100 [thread overview]
Message-ID: <87r1mf6edh.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <87h7nc6ikc.fsf@oldenburg.str.redhat.com> (Florian Weimer's message of "Wed, 20 Jan 2021 10:53:07 +0100")
One more thing that I forgot: It should be okay to use a function for
this. If we ever get asymmetric multi-processing with vector
instructions inside rseq regions (so that if descheduled, they use a
non-vector fallback), anything based on a global variable will not work,
either. The feature check would have to look at per-CPU data, requiring
a different ABI anyway.
Thanks,
Florian
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next prev parent reply other threads:[~2021-01-20 11:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-25 16:24 [PATCH] <sys/platform/x86.h>: Remove the C preprocessor magic H.J. Lu via Libc-alpha
2021-01-20 9:53 ` Florian Weimer via Libc-alpha
2021-01-20 11:23 ` Florian Weimer via Libc-alpha [this message]
2021-01-20 14:43 ` V2 " H.J. Lu via Libc-alpha
2021-01-20 15:58 ` Florian Weimer via Libc-alpha
2021-01-21 0:19 ` V3 " H.J. Lu via Libc-alpha
2021-01-21 11:19 ` Florian Weimer via Libc-alpha
2021-01-21 13:29 ` V4 " H.J. Lu via Libc-alpha
2021-01-21 13:57 ` Florian Weimer via Libc-alpha
2021-01-21 14:12 ` Adhemerval Zanella via Libc-alpha
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