ARM: LPAE: use signed arithmetic for mask definitions
authorCyril Chemparathy <cyril@ti.com>
Sun, 22 Jul 2012 17:40:38 +0000 (13:40 -0400)
committerWill Deacon <will.deacon@arm.com>
Thu, 30 May 2013 15:01:30 +0000 (16:01 +0100)
commit926edcc747e2efb3c9add7ed4dbc4e7a3a959d02
treea9426efbb842722c589c452c56c46fc2ab1545da
parente4aa937ec75df0eea0bee03bffa3303ad36c986b
ARM: LPAE: use signed arithmetic for mask definitions

This patch applies to PAGE_MASK, PMD_MASK, and PGDIR_MASK, where forcing
unsigned long math truncates the mask at the 32-bits.  This clearly does bad
things on PAE systems.

This patch fixes this problem by defining these masks as signed quantities.
We then rely on sign extension to do the right thing.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Subash Patel <subash.rp@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm/include/asm/page.h
arch/arm/include/asm/pgtable-3level.h