arm64: LLVMLinux: Calculate current_thread_info from current_stack_pointer
authorBehan Webster <behanw@converseincode.com>
Wed, 27 Aug 2014 04:29:31 +0000 (05:29 +0100)
committerWill Deacon <will.deacon@arm.com>
Mon, 8 Sep 2014 13:39:19 +0000 (14:39 +0100)
Use the global current_stack_pointer to get the value of the stack pointer.
This change supports being able to compile the kernel with both gcc and clang.

Signed-off-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Mark Charlebois <charlebm@gmail.com>
Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de>
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

index 356e03774df4b8a160ac55479a555f2644fb438e..459bf8e53208662a6117c5d496b5d21e08e67657 100644 (file)
@@ -80,8 +80,8 @@ static inline struct thread_info *current_thread_info(void) __attribute_const__;
 
 static inline struct thread_info *current_thread_info(void)
 {
-       register unsigned long sp asm ("sp");
-       return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
+       return (struct thread_info *)
+               (current_stack_pointer & ~(THREAD_SIZE - 1));
 }
 
 #define thread_saved_pc(tsk)   \