ARM: Prepare for randomized task_struct
authorArnd Bergmann <arnd@arndb.de>
Fri, 30 Jun 2017 16:03:59 +0000 (18:03 +0200)
committerKees Cook <keescook@chromium.org>
Fri, 30 Jun 2017 19:00:50 +0000 (12:00 -0700)
commitffa47aa678cfaa9b88e8a26cfb115b4768325121
tree0719bef951a1e28762868066d3bd73ac29f80c8b
parent1854c19cae0d108637c40f90ee0bb9b7c1adbc0a
ARM: Prepare for randomized task_struct

With the new task struct randomization, we can run into a build
failure for certain random seeds, which will place fields beyond
the allow immediate size in the assembly:

arch/arm/kernel/entry-armv.S: Assembler messages:
arch/arm/kernel/entry-armv.S:803: Error: bad immediate value for offset (4096)

Only two constants in asm-offset.h are affected, and I'm changing
both of them here to work correctly in all configurations.

One more macro has the problem, but is currently unused, so this
removes it instead of adding complexity.

Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[kees: Adjust commit log slightly]
Signed-off-by: Kees Cook <keescook@chromium.org>
arch/arm/include/asm/assembler.h
arch/arm/kernel/entry-armv.S
arch/arm/mm/proc-macros.S