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Commit 00b3aa3f authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: xchg()/__xchg() always_inline fixes for gcc4. 



Make __xchg() a macro, so that gcc 4.0 doesn't blow up thanks to
always_inline..

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent bc8bff63

include/asm-sh/system.h

+32 −25
Original line number Diff line number Diff line
@@ -79,10 +79,8 @@ static inline void sched_cacheflush(void) 
}

#endif



#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))



static __inline__ unsigned long tas(volatile int *m)

{ /* #define tas(ptr) (xchg((ptr),1)) */

{

	unsigned long retval;



	__asm__ __volatile__ ("tas.b	@%1\n\t"
@@ -91,8 +89,6 @@ static __inline__ unsigned long tas(volatile int *m) 
	return retval;

}



extern void __xchg_called_with_bad_pointer(void);



/*

 * A brief note on ctrl_barrier(), the control register write barrier.

 *
@@ -272,7 +268,7 @@ do { \ 
/* For spinlocks etc */

#define local_irq_save(x)	x = local_irq_save()



static __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val)

static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)

{

	unsigned long flags, retval;
@@ -283,7 +279,7 @@ static __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val) 
	return retval;

}



static __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned long val)

static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)

{

	unsigned long flags, retval;
@@ -294,19 +290,30 @@ static __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned lon 
	return retval;

}



static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size)

{

	switch (size) {

	case 4:

		return xchg_u32(ptr, x);

		break;

	case 1:

		return xchg_u8(ptr, x);

		break;

	}

	__xchg_called_with_bad_pointer();

	return x;

}

extern void __xchg_called_with_bad_pointer(void);



#define __xchg(ptr, x, size)				\

({							\

	unsigned long __xchg__res;			\

	volatile void *__xchg_ptr = (ptr);		\

	switch (size) {					\

	case 4:						\

		__xchg__res = xchg_u32(__xchg_ptr, x);	\

		break;					\

	case 1:						\

		__xchg__res = xchg_u8(__xchg_ptr, x);	\

		break;					\

	default:					\

		__xchg_called_with_bad_pointer();	\

		__xchg__res = x;			\

		break;					\

	}						\

							\

	__xchg__res;					\

})



#define xchg(ptr,x)	\

	((__typeof__(*(ptr)))__xchg((ptr),(unsigned long)(x), sizeof(*(ptr))))



static inline unsigned long __cmpxchg_u32(volatile int * m, unsigned long old,

	unsigned long new)