From mboxrd@z Thu Jan 1 00:00:00 1970 From: msalter@redhat.com (Mark Salter) Date: Mon, 12 Jan 2015 11:55:11 -0500 Subject: [PATCH] arm64: allow late use of early_ioremap Message-ID: <1421081711-1128-1-git-send-email-msalter@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 mm_init(). 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 --- arch/arm64/include/asm/fixmap.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h index 9ef6eca..e629c70 100644 --- a/arch/arm64/include/asm/fixmap.h +++ b/arch/arm64/include/asm/fixmap.h @@ -61,6 +61,9 @@ void __init early_fixmap_init(void); #define __early_set_fixmap __set_fixmap +#define __late_set_fixmap __set_fixmap +#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR) + extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); #include -- 1.8.3.1