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: Paul Mundt <lethal@linux-sh.org>

1 files changed, 32 insertions, 25 deletions

diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index 198d17e3069a..bd7dc0554b11 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -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.
  *
@@ -220,17 +216,17 @@ static __inline__ void  local_irq_restore(unsigned long x)
         }
 }
 #else
-#define local_irq_restore(x) do {                       \
+#define local_irq_restore(x) do {                       \
         if ((x & 0x000000f0) != 0x000000f0)             \
-                local_irq_enable();                             \
+                local_irq_enable();                     \
 } while (0)
 #endif
 
-#define really_restore_flags(x) do {                    \
+#define really_restore_flags(x) do {                    \
         if ((x & 0x000000f0) != 0x000000f0)             \
-                local_irq_enable();                             \
+                local_irq_enable();                     \
         else                                            \
-                local_irq_disable();                            \
+                local_irq_disable();                    \
 } while (0)
 
 /*
@@ -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)