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Date:	Thu, 20 Dec 2012 10:35:49 -0800
From:	Roland McGrath <>
To:	"H.J. Lu" <>
Cc:	"H. Peter Anvin" <>,
	Stefani Seibold <>,
	Andy Lutomirski <>,,,,,,,,,,,
	Linus Torvalds <>
Subject: Re: [PATCH 6/6] Add 32 bit VDSO support for 32 and 64 bit kernels

The Kconfig text for COMPAT_VDSO suggests that glibc versions prior to
2.3.3 may have relied on the fixed address.  I can't find anything in the
libc revision history to explain that (AFAIK the code always used
AT_SYSINFO* since it started using the vDSO at all), but it might have been
something less obvious.  Someone like Jakub might recall the details.
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