6 use core::alloc::{GlobalAlloc, Layout};
17 pub(crate) unsafe fn krealloc_aligned(ptr: *mut u8, new_layout: Layout, flags: Flags) -> *mut u8 {  in krealloc_aligned()  argument
18     // Customized layouts from `Layout::from_size_align()` can have size < align, so pad first.  in krealloc_aligned()
19     let layout = new_layout.pad_to_align();  in krealloc_aligned()  localVariable
21     // Note that `layout.size()` (after padding) is guaranteed to be a multiple of `layout.align()`  in krealloc_aligned()
24     let size = layout.size();  in krealloc_aligned()
29     // - `size` is greater than 0 since it's from `layout.size()` (which cannot be zero according  in krealloc_aligned()
35     unsafe fn alloc(&self, layout: Layout) -> *mut u8 {  in alloc()
36         // SAFETY: `ptr::null_mut()` is null and `layout` has a non-zero size by the function safety  in alloc()
38         unsafe { krealloc_aligned(ptr::null_mut(), layout, GFP_KERNEL) }  in alloc()
41     unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {  in dealloc()  argument
47     unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {  in realloc()  argument
49         // - `new_size`, when rounded up to the nearest multiple of `layout.align()`, will not  in realloc()
51         // - `layout.align()` is a proper alignment (i.e. not zero and must be a power of two).  in realloc()
52         let layout = unsafe { Layout::from_size_align_unchecked(new_size, layout.align()) };  in realloc()  localVariable
57         // - the size of `layout` is not zero because `new_size` is not zero by the function safety  in realloc()
59         unsafe { krealloc_aligned(ptr, layout, GFP_KERNEL) }  in realloc()
62     unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {  in alloc_zeroed()
63         // SAFETY: `ptr::null_mut()` is null and `layout` has a non-zero size by the function safety  in alloc_zeroed()
65         unsafe { krealloc_aligned(ptr::null_mut(), layout, GFP_KERNEL | __GFP_ZERO) }  in alloc_zeroed()