Date: Tue, 23 Oct 2012 21:42:33 +0200
From: Olaf Hering <olaf@aepfle.de>
To: linux-kernel@vger.kernel.org
Subject: when to switch from early_ioremap to ioremap
Message-ID: <20121023194233.GA23588@aepfle.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
User-Agent: Mutt/1.5.21.rev5555 (2012-07-20)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 745
Lines: 17


To obtain an address to a PFN in init_hypervisor_platform (called from
arch/x86/kernel/setup.c:setup_arch) I use early_ioremap. Later the
address to that PFN needs to be obtained with ioremap, and early_iounmap
needs to be called on the first address.

When is the time to obtain and use the new pointer, and to release to
old pointer? Right now I do that in the pci-device setup code, which
happens to work. Unfortunately early_ioremap is not mentioned in
Documentation/, hence the question.

Olaf
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/