diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/module.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/module.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/module.h b/sys/compat/linuxkpi/common/include/linux/module.h index 9d98ef7cf3db..079dacf8df6c 100644 --- a/sys/compat/linuxkpi/common/include/linux/module.h +++ b/sys/compat/linuxkpi/common/include/linux/module.h @@ -32,6 +32,8 @@ #include <sys/types.h> #include <sys/param.h> #include <sys/module.h> +#include <sys/queue.h> +#include <sys/linker.h> #include <linux/list.h> #include <linux/compiler.h> @@ -51,7 +53,26 @@ #define MODULE_SUPPORTED_DEVICE(name) #define MODULE_IMPORT_NS(_name) +/* + * THIS_MODULE is used to differentiate modules on Linux. We currently + * completely stub out any Linux struct module usage, but THIS_MODULE is still + * used to populate the "owner" fields of various drivers. Even though we + * don't actually dereference these "owner" fields they are still used by + * drivers to check if devices/dmabufs/etc come from different modules. For + * example, during DRM GEM import some drivers check if the dmabuf's owner + * matches the dev's owner. If they match because they are both NULL drivers + * may incorrectly think two resources come from the same module. + * + * To handle this we specify an undefined symbol __this_linker_file, which + * will get special treatment from the linker when resolving. This will + * populate the usages of __this_linker_file with the linker_file_t of the + * module. + */ +#ifdef KLD_MODULE +#define THIS_MODULE ((struct module *)&__this_linker_file) +#else #define THIS_MODULE ((struct module *)0) +#endif #define __MODULE_STRING(x) __stringify(x) |