From: kernel test robot <lkp@intel.com>
To: Gary Guo <gary@garyguo.net>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Miguel Ojeda <ojeda@kernel.org>,
Alice Ryhl <aliceryhl@google.com>,
Nathan Chancellor <nathan@kernel.org>,
Andreas Hindborg <a.hindborg@kernel.org>
Subject: [rust:rust-next 17/29] rust/helpers/dma.c:17:2: warning: static function 'dma_free_attrs' is used in an inline function with external linkage
Date: Tue, 07 Apr 2026 11:54:17 +0800 [thread overview]
Message-ID: <202604041420.tOm3h6GQ-lkp@intel.com> (raw)
tree: https://github.com/Rust-for-Linux/linux rust-next
head: 36f5a2b09e650b82d7b2a106e3b93af48c2010d9
commit: db702816ad4d1d0ae54a5443c8865448f2dde75f [17/29] rust: helpers: #define __rust_helper
config: um-randconfig-001-20260404 (https://download.01.org/0day-ci/archive/20260404/202604041420.tOm3h6GQ-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260404/202604041420.tOm3h6GQ-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604041420.tOm3h6GQ-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from rust/helpers/helpers.c:59:
>> rust/helpers/dma.c:17:2: warning: static function 'dma_free_attrs' is used in an inline function with external linkage [-Wstatic-in-inline]
17 | dma_free_attrs(dev, size, cpu_addr, dma_handle, attrs);
| ^
rust/helpers/dma.c:12:1: note: use 'static' to give inline function 'rust_helper_dma_free_attrs' internal linkage
12 | __rust_helper void rust_helper_dma_free_attrs(struct device *dev, size_t size,
| ^
| static
rust/helpers/helpers.c:38:23: note: expanded from macro '__rust_helper'
38 | #define __rust_helper __always_inline
| ^
include/linux/compiler_attributes.h:55:41: note: expanded from macro '__always_inline'
55 | #define __always_inline inline __attribute__((__always_inline__))
| ^
include/linux/compiler_types.h:235:16: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
include/linux/dma-mapping.h:251:13: note: 'dma_free_attrs' declared here
251 | static void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
| ^
1 warning generated.
--
In file included from rust/helpers/helpers.c:59:
>> rust/helpers/dma.c:17:2: warning: static function 'dma_free_attrs' is used in an inline function with external linkage [-Wstatic-in-inline]
17 | dma_free_attrs(dev, size, cpu_addr, dma_handle, attrs);
| ^
rust/helpers/dma.c:12:1: note: use 'static' to give inline function 'rust_helper_dma_free_attrs' internal linkage
12 | __rust_helper void rust_helper_dma_free_attrs(struct device *dev, size_t size,
| ^
| static
rust/helpers/helpers.c:38:23: note: expanded from macro '__rust_helper'
38 | #define __rust_helper __always_inline
| ^
include/linux/compiler_attributes.h:55:41: note: expanded from macro '__always_inline'
55 | #define __always_inline inline __attribute__((__always_inline__))
| ^
include/linux/compiler_types.h:235:16: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
include/linux/dma-mapping.h:251:13: note: 'dma_free_attrs' declared here
251 | static void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
| ^
1 warning generated.
vim +/dma_free_attrs +17 rust/helpers/dma.c
c1b4071ec3a6a5 FUJITA Tomonori 2025-04-12 11
8a03afe9476310 Alice Ryhl 2025-12-02 12 __rust_helper void rust_helper_dma_free_attrs(struct device *dev, size_t size,
8a03afe9476310 Alice Ryhl 2025-12-02 13 void *cpu_addr,
8a03afe9476310 Alice Ryhl 2025-12-02 14 dma_addr_t dma_handle,
8a03afe9476310 Alice Ryhl 2025-12-02 15 unsigned long attrs)
c1b4071ec3a6a5 FUJITA Tomonori 2025-04-12 16 {
c1b4071ec3a6a5 FUJITA Tomonori 2025-04-12 @17 dma_free_attrs(dev, size, cpu_addr, dma_handle, attrs);
c1b4071ec3a6a5 FUJITA Tomonori 2025-04-12 18 }
101d66828a4eef Danilo Krummrich 2025-07-16 19
:::::: The code at line 17 was first introduced by commit
:::::: c1b4071ec3a6a594df6c49bf8f04a60a88072525 rust: helpers: Add dma_alloc_attrs() and dma_free_attrs()
:::::: TO: FUJITA Tomonori <fujita.tomonori@gmail.com>
:::::: CC: Miguel Ojeda <ojeda@kernel.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-04-07 3:54 UTC|newest]
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