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, 17 insertions, 0 deletions

diff --git a/c_src/include/linux/cache.h b/c_src/include/linux/cache.h
new file mode 100644
index 00000000..c61167ca
--- /dev/null
+++ b/c_src/include/linux/cache.h
@@ -0,0 +1,17 @@
+#ifndef __TOOLS_LINUX_CACHE_H
+#define __TOOLS_LINUX_CACHE_H
+
+#define L1_CACHE_SHIFT		6
+#define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
+#define SMP_CACHE_BYTES		L1_CACHE_BYTES
+
+#define L1_CACHE_ALIGN(x)	__ALIGN_KERNEL(x, L1_CACHE_BYTES)
+
+#define __read_mostly
+#define __ro_after_init
+
+#define ____cacheline_aligned	__attribute__((__aligned__(SMP_CACHE_BYTES)))
+#define ____cacheline_aligned_in_smp ____cacheline_aligned
+
+#endif /* __TOOLS_LINUX_CACHE_H */
+