From: Calum Mackay <calum.mackay@sun.com>
To: Calum Mackay <calum.mackay@sun.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Calum Mackay <calum.mackay@cdmnet.org>,
marcelo@conectiva.com.br, mitch.dsouza@sun.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2.4: export the symbol "mmu_cr4_features" for XFree86 DRM kernel drivers
Date: Sat, 02 Aug 2003 13:34:48 +0100 [thread overview]
Message-ID: <3F2BAFE8.3090001@sun.com> (raw)
In-Reply-To: <3F2BA671.4070800@sun.com>
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Calum Mackay wrote:
> The radeon kernel driver source includes (via drm_memory.h)
> linux/vmalloc.h, iff VMAP_4_ARGS is defined. The latter includes (on
> i386) asm/asm-i386/pgtable.h, which includes asm/asm-i386/processor.h.
>
> processor.h defines some inline functions [set_in_cr4() &
> clear_in_cr4()] which reference mmu_cr4_features.
Sadly, this isn't the full story, since the radeon code doesn't
reference *_in_cr4.
The radeon code calls io/agp remap functions - again only ifdef
VMAP_4_ARGS - which do however call __flush_tlb_all(). This manipulates
the PGE bit via mmu_cr4_features.
apols for the spam...
cheers,
Calum.
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prev parent reply other threads:[~2003-08-02 12:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-01 12:52 [PATCH] 2.4: export the symbol "mmu_cr4_features" for XFree86 DRM kernel drivers Calum Mackay
2003-08-01 13:14 ` Christoph Hellwig
2003-08-02 11:54 ` Calum Mackay
2003-08-02 12:34 ` Calum Mackay [this message]
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