Commit fe92da0f authored Feb 24, 2015 by Daniel Sanders Committed by Ralf Baechle Apr 01, 2015

MIPS: Changed current_thread_info() to an equivalent supported by both clang and GCC



Without this, a 'break' instruction is executed very early in the boot and
the boot hangs.

The problem is that clang doesn't honour named registers on local variables
and silently treats them as normal uninitialized variables. However, it
does honour them on global variables.

Signed-off-by: Daniel Sanders <daniel.sanders@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: David Daney <ddaney.cavm@gmail.com>
Acked-by: Behan Webster <behanw@converseincode.com>
Patchwork: https://patchwork.linux-mips.org/patch/9311/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 65c6896d

arch/mips/include/asm/thread_info.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -55,10 +55,10 @@ struct thread_info {
		#define init_stack (init_thread_union.stack)

		/* How to get the thread information struct from C. */
		static inline struct thread_info *current_thread_info(void)
		{
		register struct thread_info *__current_thread_info __asm__("$28");

		static inline struct thread_info *current_thread_info(void)
		{
		return __current_thread_info;
		}