[PATCH v7 08/26] rust: alloc: add __GFP_NOWARN to `Flags`

Danilo Krummrich
2024-09-11T22:55:43Z

Some test cases in subsequent patches provoke allocation failures. Add
`__GFP_NOWARN` to enable test cases to silence unpleasant warnings.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---
rust/bindings/bindings_helper.h | 1 +
rust/kernel/alloc.rs | 5 +++++
2 files changed, 6 insertions(+)

diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h
index ae82e9c941af..a80783fcbe04 100644
--- a/rust/bindings/bindings_helper.h
+++ b/rust/bindings/bindings_helper.h
@@ -31,4 +31,5 @@ const gfp_t RUST_CONST_HELPER_GFP_KERNEL_ACCOUNT = GFP_KERNEL_ACCOUNT;
const gfp_t RUST_CONST_HELPER_GFP_NOWAIT = GFP_NOWAIT;
const gfp_t RUST_CONST_HELPER___GFP_ZERO = __GFP_ZERO;
const gfp_t RUST_CONST_HELPER___GFP_HIGHMEM = ___GFP_HIGHMEM;
+const gfp_t RUST_CONST_HELPER___GFP_NOWARN = ___GFP_NOWARN;
const blk_features_t RUST_CONST_HELPER_BLK_FEAT_ROTATIONAL = BLK_FEAT_ROTATIONAL;
diff --git a/rust/kernel/alloc.rs b/rust/kernel/alloc.rs
index da025faf07f8..7a405d6f3034 100644
--- a/rust/kernel/alloc.rs
+++ b/rust/kernel/alloc.rs
@@ -91,6 +91,11 @@ pub mod flags {
/// use any filesystem callback. It is very likely to fail to allocate memory, even for very
/// small allocations.
pub const GFP_NOWAIT: Flags = Flags(bindings::GFP_NOWAIT);
+
+ /// Suppresses allocation failure reports.
+ ///
+ /// This is normally or'd with other flags.
+ pub const __GFP_NOWARN: Flags = Flags(bindings::__GFP_NOWARN);
}

/// The kernel's [`Allocator`] trait.
--
2.46.0