Messages in this thread Patch in this message | | | From | Christophe JAILLET <> | Subject | [PATCH] driver core: Define dev_err_probe() as __cold | Date | Sat, 6 Aug 2022 08:49:23 +0200 |
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Give a hint to the compiler that dev_err_probe() is used for error handling. So calling paths are unlikely.
From gcc documentation: The paths leading to calls of cold functions within code are marked as unlikely by the branch prediction mechanism.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- include/linux/device.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/device.h b/include/linux/device.h index 424b55df0272..4ac16bde9bf7 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -1093,7 +1093,7 @@ void device_links_supplier_sync_state_pause(void); void device_links_supplier_sync_state_resume(void); extern __printf(3, 4) -int dev_err_probe(const struct device *dev, int err, const char *fmt, ...); +int __cold dev_err_probe(const struct device *dev, int err, const char *fmt, ...); /* Create alias, so I can be autoloaded. */ #define MODULE_ALIAS_CHARDEV(major,minor) \ -- 2.34.1
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