From cb9b55d21fe06ca5e4ba244bb5aac0afeb745c8e Mon Sep 17 00:00:00 2001 From: Matthias Maennich Date: Fri, 6 Sep 2019 11:32:28 +0100 Subject: modpost: add support for symbol namespaces Add support for symbols that are exported into namespaces. For that, extract any namespace suffix from the symbol name. In addition, emit a warning whenever a module refers to an exported symbol without explicitly importing the namespace that it is defined in. This patch consistently adds the namespace suffix to symbol names exported into Module.symvers. Example warning emitted by modpost in case of the above violation: WARNING: module ums-usbat uses symbol usb_stor_resume from namespace USB_STORAGE, but does not import it. Co-developed-by: Martijn Coenen Signed-off-by: Martijn Coenen Reviewed-by: Joel Fernandes (Google) Reviewed-by: Greg Kroah-Hartman Signed-off-by: Matthias Maennich Signed-off-by: Jessica Yu --- Documentation/kbuild/modules.rst | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'Documentation/kbuild') diff --git a/Documentation/kbuild/modules.rst b/Documentation/kbuild/modules.rst index 24e763482650..d2ae799237fd 100644 --- a/Documentation/kbuild/modules.rst +++ b/Documentation/kbuild/modules.rst @@ -470,9 +470,12 @@ build. The syntax of the Module.symvers file is:: - + - 0x2d036834 scsi_remove_host drivers/scsi/scsi_mod + 0xe1cc2a05 usb_stor_suspend USB_STORAGE drivers/usb/storage/usb-storage EXPORT_SYMBOL_GPL + + The fields are separated by tabs and values may be empty (e.g. + if no namespace is defined for an exported symbol). For a kernel build without CONFIG_MODVERSIONS enabled, the CRC would read 0x00000000. -- cgit