linux-kernel - [PATCH v4 1/3] Adds bitmap.c and bitops.c Rust bindings.

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Message-ID: <20250318174756.1625571-3-bqe@google.com>
Date: Tue, 18 Mar 2025 17:45:45 +0000
From: Burak Emir <bqe@...gle.com>
To: Yury Norov <yury.norov@...il.com>
Cc: Burak Emir <bqe@...gle.com>, Rasmus Villemoes <linux@...musvillemoes.dk>, 
	Viresh Kumar <viresh.kumar@...aro.org>, Miguel Ojeda <ojeda@...nel.org>, 
	Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
	Gary Guo <gary@...yguo.net>, Bjorn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 1/3] Adds bitmap.c and bitops.c Rust bindings.

Adds helpers for bitmap.c and bitops.c to get Rust bindings
for inline methods __set_bit and __clear_bit (these are
non-atomic variants) as well as bitmap_copy_and_extend.

These are needed for providing a basic Rust Bitmap API.
Update MAINTAINERS.

Suggested-by: Alice Ryhl <aliceryhl@...gle.com>
Signed-off-by: Burak Emir <bqe@...gle.com>
---
 MAINTAINERS                     | 11 +++++++++++
 rust/bindings/bindings_helper.h |  1 +
 rust/helpers/bitmap.c           |  9 +++++++++
 rust/helpers/bitops.c           | 13 +++++++++++++
 rust/helpers/helpers.c          |  2 ++
 5 files changed, 36 insertions(+)
 create mode 100644 rust/helpers/bitmap.c
 create mode 100644 rust/helpers/bitops.c

diff --git a/MAINTAINERS b/MAINTAINERS
index c43d66bd85f3..50f44d7e5c6e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4029,6 +4029,12 @@ F:	tools/include/vdso/bits.h
 F:	tools/lib/bitmap.c
 F:	tools/lib/find_bit.c
 
+BITMAP API BINDINGS [RUST]
+M:	Yury Norov <yury.norov@...il.com>
+S:	Maintained
+F:	rust/helpers/bitmap.c
+F:	rust/helpers/cpumask.c
+
 BITMAP API [RUST]
 M:	Viresh Kumar <viresh.kumar@...aro.org> (cpumask)
 R:	Yury Norov <yury.norov@...il.com>
@@ -4049,6 +4055,11 @@ F:	include/linux/bitops.h
 F:	lib/test_bitops.c
 F:	tools/*/bitops*
 
+BITOPS API BINDINGS [RUST]
+M:	Yury Norov <yury.norov@...il.com>
+S:	Maintained
+F:	rust/helpers/bitops.c
+
 BLINKM RGB LED DRIVER
 M:	Jan-Simon Moeller <jansimon.moeller@....de>
 S:	Maintained
diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h
index 55354e4dec14..6bd4396b9cd3 100644
--- a/rust/bindings/bindings_helper.h
+++ b/rust/bindings/bindings_helper.h
@@ -7,6 +7,7 @@
  */
 
 #include <kunit/test.h>
+#include <linux/bitmap.h>
 #include <linux/blk-mq.h>
 #include <linux/blk_types.h>
 #include <linux/blkdev.h>
diff --git a/rust/helpers/bitmap.c b/rust/helpers/bitmap.c
new file mode 100644
index 000000000000..a50e2f082e47
--- /dev/null
+++ b/rust/helpers/bitmap.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bitmap.h>
+
+void rust_helper_bitmap_copy_and_extend(unsigned long *to, const unsigned long *from,
+		unsigned int count, unsigned int size)
+{
+	bitmap_copy_and_extend(to, from, count, size);
+}
diff --git a/rust/helpers/bitops.c b/rust/helpers/bitops.c
new file mode 100644
index 000000000000..0ea1611b95dc
--- /dev/null
+++ b/rust/helpers/bitops.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bitops.h>
+
+void rust_helper___set_bit(unsigned int nr, unsigned long *addr)
+{
+	__set_bit(nr, addr);
+}
+
+void rust_helper___clear_bit(unsigned int nr, unsigned long *addr)
+{
+	__clear_bit(nr, addr);
+}
diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index 0640b7e115be..74e5e10694a4 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -7,6 +7,8 @@
  * Sorted alphabetically.
  */
 
+#include "bitmap.c"
+#include "bitops.c"
 #include "blk.c"
 #include "bug.c"
 #include "build_assert.c"
-- 
2.49.0.rc1.451.g8f38331e32-goog