From: Rusty Trivial Russell <rusty@rustcorp.com.au>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-kernel@vger.kernel.org
Subject: [TRIVIAL] __cat and __unique_id in stringify.h
Date: Mon, 07 Jul 2003 17:57:03 +1000 [thread overview]
Message-ID: <20030707080051.E23832C35F@lists.samba.org> (raw)
From: Rusty Russell <rusty@rustcorp.com.au>
__cat() to paste tokens could be used in a few places, and
__unique_id() is useful for module.h.
Linus, please apply,
Rusty.
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
Name: Centralize token pasting and generation of unique IDs
Author: Rusty Russell
Status: Tested on 2.5.70-bk13
D: Add __cat(a,b) to implement token pasting to stringify.h. To
D: generate unique names, __unique_id(stem) is implemented (it'd be
D: nice to have a gcc extension to give a unique identifier). Change
D: module.h to use them.
--- trivial-2.5.74-bk4/include/linux/module.h.orig 2003-07-07 17:36:52.000000000 +1000
+++ trivial-2.5.74-bk4/include/linux/module.h 2003-07-07 17:36:52.000000000 +1000
@@ -55,10 +55,8 @@
unsigned long value);
#ifdef MODULE
-#define ___module_cat(a,b) __mod_ ## a ## b
-#define __module_cat(a,b) ___module_cat(a,b)
#define __MODULE_INFO(tag, name, info) \
-static const char __module_cat(name,__LINE__)[] \
+static const char __unique_id(name)[] \
__attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
#define MODULE_GENERIC_TABLE(gtype,name) \
--- trivial-2.5.74-bk4/include/linux/stringify.h.orig 2003-07-07 17:36:52.000000000 +1000
+++ trivial-2.5.74-bk4/include/linux/stringify.h 2003-07-07 17:36:52.000000000 +1000
@@ -9,4 +9,11 @@
#define __stringify_1(x) #x
#define __stringify(x) __stringify_1(x)
+/* Paste two tokens together. */
+#define ___cat(a,b) a ## b
+#define __cat(a,b) ___cat(a,b)
+
+/* Try to give a unique identifier: this comes close, iff used as static. */
+#define __unique_id(stem) \
+ __cat(__cat(__uniq,stem),__cat(__LINE__,KBUILD_BASENAME))
#endif /* !__LINUX_STRINGIFY_H */
--
What is this? http://www.kernel.org/pub/linux/kernel/people/rusty/trivial/
Don't blame me: the Monkey is driving
File: Rusty Russell <rusty@rustcorp.com.au>: [PATCH] __cat and __unique_id in stringify.h
reply other threads:[~2003-07-07 7:46 UTC|newest]
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