From mboxrd@z Thu Jan 1 00:00:00 1970 From: mlangsdo@redhat.com (Mark Langsdorf) Date: Thu, 15 Jan 2015 12:44:34 -0600 Subject: [PATCH v7 01/17] arm64: allow late use of early_ioremap In-Reply-To: <1421247905-3749-2-git-send-email-hanjun.guo@linaro.org> References: <1421247905-3749-1-git-send-email-hanjun.guo@linaro.org> <1421247905-3749-2-git-send-email-hanjun.guo@linaro.org> Message-ID: <54B80A92.6050209@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 01/14/2015 09:04 AM, Hanjun Guo wrote: > From: Mark Salter > > Commit 0e63ea48b4d8 (arm64/efi: add missing call to early_ioremap_reset()) > added a missing call to early_ioremap_reset(). This triggers a BUG if code > tries using early_ioremap() after the early_ioremap_reset(). This is a > problem for some ACPI code which needs short-lived temporary mappings > after paging_init() but before acpi_early_init() in start_kernel(). This > patch adds definitions for the __late_set_fixmap() and __late_clear_fixmap() > which avoids the BUG by allowing later use of early_ioremap(). > > Signed-off-by: Mark Salter > CC: Leif Lindholm > CC: Ard Biesheuvel > [hj: update the change log] > Signed-off-by: Hanjun Guo > --- Tested-by: Mark Langsdorf