16MB alignment for ioremap mappings was added by commit a069c896d0d6 ("[ARM]
3705/1: add supersection support to ioremap()") in order to support supersection
mappings. But __arm_ioremap_pfn_caller uses section and supersection mappings
only in !SMP && !LPAE case. There is no need for such big alignment if either
SMP or LPAE is enabled.After this change, ioremap will use default maximum alignment of 128 pages. Cc: Russell King <[email protected]> Cc: Guan Xuetao <[email protected]> Cc: Nicolas Pitre <[email protected]> Cc: James Bottomley <[email protected]> Cc: Will Deacon <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Dmitry Safonov <[email protected]> Link: https://lkml.kernel.org/g/[email protected] Signed-off-by: Sergey Dyasly <[email protected]> --- arch/arm/include/asm/memory.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index 184def0..c3ef139 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -78,10 +78,12 @@ */ #define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff)) +#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE) /* * Allow 16MB-aligned ioremap pages */ #define IOREMAP_MAX_ORDER 24 +#endif #else /* CONFIG_MMU */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
