move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 48 insertions, 0 deletions

diff --git a/c_src/include/linux/module.h b/c_src/include/linux/module.h
new file mode 100644
index 00000000..42d4e18a
--- /dev/null
+++ b/c_src/include/linux/module.h
@@ -0,0 +1,48 @@
+#ifndef _LINUX_MODULE_H
+#define _LINUX_MODULE_H
+
+#include <linux/stat.h>
+#include <linux/compiler.h>
+#include <linux/export.h>
+
+struct module;
+
+#define module_init(initfn)					\
+	__attribute__((constructor(120)))			\
+	static void __call_##initfn(void) { BUG_ON(initfn()); }
+
+#if 0
+#define module_exit(exitfn)					\
+	__attribute__((destructor(109)))			\
+	static void __call_##exitfn(void) { exitfn(); }
+#endif
+
+#define module_exit(exitfn)					\
+	__attribute__((unused))					\
+	static void __call_##exitfn(void) { exitfn(); }
+
+#define MODULE_INFO(tag, info)
+#define MODULE_ALIAS(_alias)
+#define MODULE_SOFTDEP(_softdep)
+#define MODULE_LICENSE(_license)
+#define MODULE_AUTHOR(_author)
+#define MODULE_DESCRIPTION(_description)
+#define MODULE_VERSION(_version)
+
+static inline void __module_get(struct module *module)
+{
+}
+
+static inline int try_module_get(struct module *module)
+{
+	return 1;
+}
+
+static inline void module_put(struct module *module)
+{
+}
+
+#define module_param_named(name, value, type, perm)
+#define MODULE_PARM_DESC(_parm, desc)
+
+#endif /* _LINUX_MODULE_H */