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Re: ppc64 vDSO in mainline

From: Ulrich Drepper <drepper at redhat dot com>
To: Steve Munroe <sjmunroe at us dot ibm dot com>
Cc: Roland McGrath <roland at redhat dot com>, Alan Modra <amodra at bigpond dot net dot au>, Benjamin Herrenschmidt <benh at kernel dot crashing dot org>, libc-alpha at sources dot redhat dot com
Date: Mon, 28 Mar 2005 15:59:36 -0800
Subject: Re: ppc64 vDSO in mainline
Organization: Red Hat, Inc.
References: <OF7669852D.66A49FF8-ON86256FD2.00793F91-86256FD2.007F59B7@us.ibm.com>

Steve Munroe wrote:

3) a function which is currently
exported by libc , but a better optimized version (with a different
symbol) is also exported by the VDSO.


There is no reason to add any complications or dependency problems for
this.  Just using a pointer in libc itself, a test for NULL and if not,
jump to the function is enough.  The penalty for this extra indication
if minimal compared to all the other work involved.

--
â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â

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Follow-Ups:
- Re: ppc64 vDSO in mainline
  - From: Benjamin Herrenschmidt
- Re: ppc64 vDSO in mainline
  - From: Jakub Jelinek
- Re: ppc64 vDSO in mainline
  - From: Steve Munroe

References:
- Re: ppc64 vDSO in mainline
  - From: Steve Munroe

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