[PATCH] arm: LLVMLinux: Use __builtin_frame_address to get thread info

[behanw]

From: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx>

The LLVMLinux Project is working to be able to build the Linux kernel with
clang/LLVM. With the release of LLVM 3.3 clang is now able to compile the Linux
kernel with a number of small patches (available from the LLVMLinux git repo).

Use the frame pointer to calculate the start of the stack for current_thread_info()
The existing code uses the stack pointer to do this calculation.
Using the frame pointer yeilds the same value in a portable way.
This change supports being able to compile the kernel with gcc and Clang.

Behan Webster (1):
  arm: LLVMLinux: Calculate current_thread_info from fp

 arch/arm/include/asm/thread_info.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

-- 
1.8.1.2

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