Merge tag 'i2c-host-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux into i2c/for-mergewindow

i2c-host updates for v6.15

Refactoring and cleanups
 - octeon, cadence, i801, pasemi, mlxbf, bcm-iproc: general
   refactorings
 - octeon: remove 10-bit address support

Improvements
 - amd-asf: improved error handling
 - designware: use guard(mutex)
 - amd-asf, designware: update naming to follow latest specs
 - cadence: fix cleanup path in probe
 - i801: use MMIO and I/O mapping helpers to access registers
 - pxa: handle error after clk_prepare_enable

New features
 - added i2c_10bit_addr_*_from_msg() and updated multiple drivers
 - omap: added multiplexer state handling
 - qcom-geni: update frequency configuration
 - qup: introduce DMA usage policy

New hardware support
 - exynos: add support for Samsung exynos7870
 - k1: add support for spacemit k1 (new driver)
 - imx: add support for i.mx94 lpi2c
 - rk3x: add support for rk3562

Multiplexers
 - ltc4306, reg: fix assignment in platform_driver structure

1 files changed, 18 insertions, 0 deletions

diff --git a/rust/kernel/alloc/allocator_test.rs b/rust/kernel/alloc/allocator_test.rs
index e3240d16040b..c37d4c0c64e9 100644
--- a/rust/kernel/alloc/allocator_test.rs
+++ b/rust/kernel/alloc/allocator_test.rs
@@ -62,6 +62,24 @@ unsafe impl Allocator for Cmalloc {
             ));
         }
 
+        // ISO C (ISO/IEC 9899:2011) defines `aligned_alloc`:
+        //
+        // > The value of alignment shall be a valid alignment supported by the implementation
+        // [...].
+        //
+        // As an example of the "supported by the implementation" requirement, POSIX.1-2001 (IEEE
+        // 1003.1-2001) defines `posix_memalign`:
+        //
+        // > The value of alignment shall be a power of two multiple of sizeof (void *).
+        //
+        // and POSIX-based implementations of `aligned_alloc` inherit this requirement. At the time
+        // of writing, this is known to be the case on macOS (but not in glibc).
+        //
+        // Satisfy the stricter requirement to avoid spurious test failures on some platforms.
+        let min_align = core::mem::size_of::<*const crate::ffi::c_void>();
+        let layout = layout.align_to(min_align).map_err(|_| AllocError)?;
+        let layout = layout.pad_to_align();
+
         // SAFETY: Returns either NULL or a pointer to a memory allocation that satisfies or
         // exceeds the given size and alignment requirements.
         let dst = unsafe { libc_aligned_alloc(layout.align(), layout.size()) } as *mut u8;