Re: [PATCH] deprecated function attribute

[Robert Love <rml@tech9.net>]

On Sat, 2002-12-28 at 13:53, Daniel Jacobowitz wrote:

> > If we want to be preemptive, we can rename the above to "__deprecated__"
> > but I think plain "deprecated" is much better looking.
> 
> Eek, please call it something else - something that looks visibly like
> a syntax rather than a name.  __deprecated or __deprecated__ or
> DEPRECATED.

Like I said, that is fine with me...

Attached.  Still untested :-)

	Robert Love

 compiler.h |   13 +++++++++++++
 1 files changed, 13 insertions(+)


diff -urN linux-2.5.53/include/linux/compiler.h linux/include/linux/compiler.h
--- linux-2.5.53/include/linux/compiler.h	2002-12-28 12:38:56.000000000 -0500
+++ linux/include/linux/compiler.h	2002-12-28 12:45:03.000000000 -0500
@@ -13,6 +13,19 @@
 #define likely(x)	__builtin_expect((x),1)
 #define unlikely(x)	__builtin_expect((x),0)
 
+/*
+ * Allow us to mark functions as 'deprecated' and have gcc emit a nice
+ * warning for each use, in hopes of speeding the functions removal.
+ * Usage is:
+ * 		int deprecated foo(void)
+ * and then gcc will emit a warning for each usage of the function.
+ */
+#if __GNUC__ == 3
+#define __deprecated__		__attribute__((deprecated))
+#else
+#define __deprecated__
+#endif
+
 /* This macro obfuscates arithmetic on a variable address so that gcc
    shouldn't recognize the original var, and make assumptions about it */
 #define RELOC_HIDE(ptr, off)					\