Merge branch 'reset-seq' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libat...

[powerpc.git] / include / linux / compiler-gcc.h

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 2e05e1e..a9f7947 100644 (file)
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -11,16 +11,32 @@
 
 /* This macro obfuscates arithmetic on a variable address so that gcc
    shouldn't recognize the original var, and make assumptions about it */
+/*
+ * Versions of the ppc64 compiler before 4.1 had a bug where use of
+ * RELOC_HIDE could trash r30. The bug can be worked around by changing
+ * the inline assembly constraint from =g to =r, in this particular
+ * case either is valid.
+ */
 #define RELOC_HIDE(ptr, off)                                   \
   ({ unsigned long __ptr;                                      \
-    __asm__ ("" : "=g"(__ptr) : "0"(ptr));             \
+    __asm__ ("" : "=r"(__ptr) : "0"(ptr));             \
     (typeof(ptr)) (__ptr + (off)); })
 
+/* &a[0] degrades to a pointer: a different type from an array */
+#define __must_be_array(a) \
+  BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
 
 #define inline         inline          __attribute__((always_inline))
 #define __inline__     __inline__      __attribute__((always_inline))
 #define __inline       __inline        __attribute__((always_inline))
 #define __deprecated                   __attribute__((deprecated))
+#define __packed                       __attribute__((packed))
+#define __weak                         __attribute__((weak))
+#define __naked                                __attribute__((naked))
+#define __noreturn                     __attribute__((noreturn))
+#define __pure                         __attribute__((pure))
+#define __aligned(x)                   __attribute__((aligned(x)))
+#define __printf(a,b)                  __attribute__((format(printf,a,b)))
 #define  noinline                      __attribute__((noinline))
 #define __attribute_pure__             __attribute__((pure))
 #define __attribute_const__            __attribute__((__const__))