arm64: LLVMLinux: Add current_stack_pointer() for arm64
authorBehan Webster <behanw@converseincode.com>
Wed, 27 Aug 2014 04:29:29 +0000 (05:29 +0100)
committerWill Deacon <will.deacon@arm.com>
Mon, 8 Sep 2014 13:39:19 +0000 (14:39 +0100)
commit3337a10e0d0cbc9225cefc23aa7a604b698367ed
treeef964ab4ac4964539f16384ef362f6d1aa5d0bee
parent11d91a770f1fff44dafdf88d6089a3451f99c9b6
arm64: LLVMLinux: Add current_stack_pointer() for arm64

Define a global named register for current_stack_pointer. The use of this new
variable guarantees that both gcc and clang can access this register in C code.

Signed-off-by: Behan Webster <behanw@converseincode.com>
Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de>
Reviewed-by: Mark Charlebois <charlebm@gmail.com>
Reviewed-by: Olof Johansson <olof@lixom.net>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/include/asm/thread_info.h