linux-kernel - [PATCH v2 05/62] compiler: Tweak __UNIQUE

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Message-ID: <e40a85d6742609779a9a86af95f7cbebdacefe12.1746821544.git.jpoimboe@kernel.org>
Date: Fri,  9 May 2025 13:16:29 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Petr Mladek <pmladek@...e.com>,
	Miroslav Benes <mbenes@...e.cz>,
	Joe Lawrence <joe.lawrence@...hat.com>,
	live-patching@...r.kernel.org,
	Song Liu <song@...nel.org>,
	laokz <laokz@...mail.com>,
	Jiri Kosina <jikos@...nel.org>,
	Marcos Paulo de Souza <mpdesouza@...e.com>,
	Weinan Liu <wnliu@...gle.com>,
	Fazla Mehrab <a.mehrab@...edance.com>,
	Chen Zhongjin <chenzhongjin@...wei.com>,
	Puranjay Mohan <puranjay@...nel.org>
Subject: [PATCH v2 05/62] compiler: Tweak __UNIQUE_ID() naming

In preparation for the objtool klp diff subcommand, add an underscore
between the name and the counter.  This will make it possible for
objtool to distinguish between the non-unique and unique parts of the
symbol name so it can properly correlate the symbols.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 include/linux/compiler.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 27725f1ab5ab..0efcfa6dab0f 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -163,7 +163,11 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
 	__asm__ ("" : "=r" (var) : "0" (var))
 #endif
 
-#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+/* Format: __UNIQUE_ID_<name>_<__COUNTER__> */
+#define __UNIQUE_ID(name)					\
+	__PASTE(__UNIQUE_ID_,					\
+	__PASTE(name,						\
+	__PASTE(_, __COUNTER__)))
 
 /**
  * data_race - mark an expression as containing intentional data races
-- 
2.49.0