sh: Fix TIF_USEDFPU clearing under FPU emulation. (138bed15) · Commits · 戴 / test

The unlazy_fpu() path calls in to save_fpu() if the task has TIF_USEDFPU set. save_fpu() being the crap API that it is has the side effect of clearing the flag itself, which presently doesn't happen if we're using FPU emulation. Fix this up for now, pending an overhaul in 2.6.26. Signed-off-by:

Paul Mundt <lethal@linux-sh.org>

include/asm-sh/fpu.h

+6 −1

Original line number	Diff line number	Diff line
		@@ -20,9 +20,14 @@ struct task_struct;

		extern void save_fpu(struct task_struct __tsk, struct pt_regs regs);
		#else

		#define release_fpu(regs) do { } while (0)
		#define grab_fpu(regs) do { } while (0)
		#define save_fpu(tsk, regs) do { } while (0)

		static inline void save_fpu(struct task_struct tsk, struct pt_regs regs)
		{
		clear_tsk_thread_flag(tsk, TIF_USEDFPU);
		}
		#endif

		extern int do_fpu_inst(unsigned short, struct pt_regs *);

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