1 files changed, 11 insertions, 1 deletions

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index acd583384bd9..fe23792f05c1 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -36,10 +36,20 @@
 #define __weak                          __attribute__((weak))
 #define __naked                         __attribute__((naked))
 #define __noreturn                      __attribute__((noreturn))
+
+/*
+ * From the GCC manual:
+ *
+ * Many functions have no effects except the return value and their
+ * return value depends only on the parameters and/or global
+ * variables.  Such a function can be subject to common subexpression
+ * elimination and loop optimization just as an arithmetic operator
+ * would be.
+ * [...]
+ */
 #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__))
 #define __maybe_unused                  __attribute__((unused))