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, 0 insertions, 84 deletions

diff --git a/include/linux/bit_spinlock.h b/include/linux/bit_spinlock.h
deleted file mode 100644
index 873f08c2..00000000
--- a/include/linux/bit_spinlock.h
+++ /dev/null
@@ -1,84 +0,0 @@
-#ifndef __LINUX_BIT_SPINLOCK_H
-#define __LINUX_BIT_SPINLOCK_H
-
-#include <linux/kernel.h>
-#include <linux/preempt.h>
-#include <linux/futex.h>
-#include <urcu/futex.h>
-
-/*
- * The futex wait op wants an explicit 32-bit address and value. If the bitmap
- * used for the spinlock is 64-bit, cast down and pass the right 32-bit region
- * for the in-kernel checks. The value is the copy that has already been read
- * from the atomic op.
- *
- * The futex wake op interprets the value as the number of waiters to wake (up
- * to INT_MAX), so pass that along directly.
- */
-static inline void do_futex(int nr, unsigned long *addr, unsigned long v, int futex_flags)
-{
-	u32 *addr32 = (u32 *) addr;
-	u32 *v32 = (u32 *) &v;
-	int shift = 0;
-
-	futex_flags |= FUTEX_PRIVATE_FLAG;
-
-#if BITS_PER_LONG == 64
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-	shift = (nr >= 32) ? 1 : 0;
-#else
-	shift = (nr < 32) ? 1 : 0;
-#endif
-#endif
-	if (shift) {
-		addr32 += shift;
-		v32 += shift;
-	}
-	/*
-	 * The shift to determine the futex address may have cast away a
-	 * literal wake count value. The value is capped to INT_MAX and thus
-	 * always in the low bytes of v regardless of bit nr. Copy in the wake
-	 * count to whatever 32-bit range was selected.
-	 */
-	if (futex_flags == FUTEX_WAKE_PRIVATE)
-		*v32 = (u32) v;
-	futex(addr32, futex_flags, *v32, NULL, NULL, 0);
-}
-
-static inline void bit_spin_lock(int nr, unsigned long *_addr)
-{
-	unsigned long mask;
-	unsigned long *addr = _addr + (nr / BITS_PER_LONG);
-	unsigned long v;
-
-	nr &= BITS_PER_LONG - 1;
-	mask = 1UL << nr;
-
-	while (1) {
-		v = __atomic_fetch_or(addr, mask, __ATOMIC_ACQUIRE);
-		if (!(v & mask))
-			break;
-
-		do_futex(nr, addr, v, FUTEX_WAIT);
-	}
-}
-
-static inline void bit_spin_wake(int nr, unsigned long *_addr)
-{
-	do_futex(nr, _addr, INT_MAX, FUTEX_WAKE);
-}
-
-static inline void bit_spin_unlock(int nr, unsigned long *_addr)
-{
-	unsigned long mask;
-	unsigned long *addr = _addr + (nr / BITS_PER_LONG);
-
-	nr &= BITS_PER_LONG - 1;
-	mask = 1UL << nr;
-
-	__atomic_and_fetch(addr, ~mask, __ATOMIC_RELEASE);
-	do_futex(nr, addr, INT_MAX, FUTEX_WAKE);
-}
-
-#endif /* __LINUX_BIT_SPINLOCK_H */
-