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Re: MIPS_ATOMIC_SET again (Re: newest kernel

To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Subject: Re: MIPS_ATOMIC_SET again (Re: newest kernel
From: Joe deBlaquiere <jadb@redhat.com>
Date: Tue, 29 May 2001 08:02:46 -0500
Cc: "Kevin D. Kissell" <kevink@mips.com>, linux-mips@oss.sgi.com
References: <Pine.GSO.3.96.1010528190412.15200Q-100000@delta.ds2.pg.gda.pl>
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Maciej W. Rozycki wrote:

On Mon, 28 May 2001, Kevin D. Kissell wrote:


Use a global variable testable by the inline code?


 With both variants inlined?  Now that's really ugly.


 Are vr41xx plain ISA I or crippled ISA II+ CPUs?

Actually, they are crippled MIPS III+ 64-bit CPUs


 Then an ll/sc and lld/scd emulation seems to be most appropriate here.  I
don't think we want to add _test_and_set() to mips64*-linux.

All the cases I've seen have been for 32-bit kernels. A 64-bit PDA kernel seems 
like a wee tiny bit of overkill



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Joe deBlaquiere
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