Steven Capper f295070687 ARM: 8108/1: mm: Introduce {pte,pmd}_isset and {pte,pmd}_isclear ... Long descriptors on ARM are 64 bits, and some pte functions such as pte_dirty return a bitwise-and of a flag with the pte value. If the flag to be tested resides in the upper 32 bits of the pte, then we run into the danger of the result being dropped if downcast. For example: gather_stats(page, md, pte_dirty(*pte), 1); where pte_dirty(*pte) is downcast to an int. This patch introduces a new macro pte_isset which performs the bitwise and, then performs a double logical invert (where needed) to ensure predictable downcasting. The logical inverse pte_isclear is also introduced. Equivalent pmd functions for Transparent HugePages have also been added. Signed-off-by: Steve Capper <steve.capper@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2014-07-24 14:27:07 +01:00
..
asm	ARM: 8108/1: mm: Introduce {pte,pmd}_isset and {pte,pmd}_isclear	2014-07-24 14:27:07 +01:00
debug	Samsung Exynos updates for 3.16	2014-05-30 21:44:49 -07:00
uapi/asm	ARM: 8097/1: unistd.h: relocate comments back to place	2014-07-18 12:29:31 +01:00