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| author | Arnd Bergmann <arnd@arndb.de> | 2026-03-31 16:28:38 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-05-28 21:24:43 -0700 |
| commit | cd2464a059d6e88eecda87d71d3dbc87175289f0 (patch) | |
| tree | 3e55a18a8a71f6caff8161fa886f3540485ab320 /include/linux | |
| parent | fe495c4e2ee34f84d856c06d524d43512e1f4f98 (diff) | |
| download | lwn-cd2464a059d6e88eecda87d71d3dbc87175289f0.tar.gz lwn-cd2464a059d6e88eecda87d71d3dbc87175289f0.zip | |
init.h: discard exitcall symbols early
Any __exitcall() and built-in module_exit() handler is marked as __used,
which leads to the code being included in the object file and later
discarded at link time.
As far as I can tell, this was originally added at the same time as
initcalls were marked the same way, to prevent them from getting dropped
with gcc-3.4, but it was never actaully necessary to keep exit functions
around.
Mark them as __maybe_unused instead, which lets the compiler treat the
exitcalls as entirely unused, and make better decisions about dropping
specializing static functions called from these.
Link: https://lore.kernel.org/all/acruxMNdnUlyRHiy@google.com/
Link: https://lore.kernel.org/20260331142846.3187706-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nicolas Schier <nsc@kernel.org>
Cc: Andriy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Marco Elver <elver@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/init.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/init.h b/include/linux/init.h index 40331923b9f4..6326c61e2332 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -47,7 +47,7 @@ #define __initdata __section(".init.data") #define __initconst __section(".init.rodata") #define __exitdata __section(".exit.data") -#define __exit_call __used __section(".exitcall.exit") +#define __exit_call __maybe_unused __section(".exitcall.exit") /* * modpost check for section mismatches during the kernel build. |