From: Olaf Hering <olaf@aepfle.de>
To: linux-kernel@vger.kernel.org
Subject: when to switch from early_ioremap to ioremap
Date: Tue, 23 Oct 2012 21:42:33 +0200 [thread overview]
Message-ID: <20121023194233.GA23588@aepfle.de> (raw)
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
next reply other threads:[~2012-10-23 19:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-23 19:42 Olaf Hering [this message]
2012-10-23 20:54 ` when to switch from early_ioremap to ioremap Yinghai Lu
2012-10-23 21:50 ` Olaf Hering
2012-10-23 22:02 ` Yinghai Lu
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