]> git.karo-electronics.de Git - linux-beck.git/commit
ARM: 7805/1: mm: change max*pfn to include the physical offset of memory
authorSantosh Shilimkar <santosh.shilimkar@ti.com>
Thu, 1 Aug 2013 02:12:01 +0000 (03:12 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Thu, 31 Oct 2013 14:49:29 +0000 (14:49 +0000)
commit26ba47b18318abe7dadbe9294a611c0e932651d8
treeab542f22462c683920457069bf95893252f42538
parent8e0cb8a1f6acf673ef9ab573087020ebafa8da51
ARM: 7805/1: mm: change max*pfn to include the physical offset of memory

Most of the kernel code assumes that max*pfn is maximum pfns because
the physical start of memory is expected to be PFN0. Since this
assumption is not true on ARM architectures, the meaning of max*pfn
is number of memory pages. This is done to keep drivers happy which
are making use of of these variable to calculate the dma bounce limit
using dma_mask.

Now since we have a architecture override possibility for DMAable
maximum pfns, lets make meaning of max*pfns as maximum pnfs on ARM
as well.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/include/asm/dma-mapping.h
arch/arm/mm/init.c