move Rust sources to top level, C sources into c_src

[bcachefs-tools-debian] / include / linux / bit_spinlock.h

diff --git a/include/linux/bit_spinlock.h b/include/linux/bit_spinlock.h
deleted file mode 100644 (file)
index 873f08c..0000000
--- 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 */
-