[PATCH v2] kasan: update outdated comment

[Kexin Sun]

The function kmalloc_large() was renamed kmalloc_large_noprof() by
commit 7bd230a26648 ("mm/slab: enable slab allocation tagging for
kmalloc and friends"), and subsequently renamed __kmalloc_large_noprof()
by commit a0a44d9175b3 ("mm, slab: don't wrap internal functions with
alloc_hooks()"), making it an internal implementation detail.

Large kmalloc allocations are now performed through the public kmalloc()
interface directly, making the reference to KMALLOC_MAX_SIZE also stale
(KMALLOC_MAX_CACHE_SIZE would be more accurate). Remove the references
to kmalloc_large() and KMALLOC_MAX_SIZE, and rephrase the description
for large kmalloc allocations.

Suggested-by: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Assisted-by: unnamed:deepseek-v3.2 coccinelle
Signed-off-by: Kexin Sun <kexinsun@xxxxxxxxxxxxxxxx>
---
 include/linux/kasan.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 338a1921a50a..bf233bde68c7 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -352,8 +352,8 @@ bool __kasan_mempool_poison_object(void *ptr, unsigned long ip);
  * kasan_mempool_unpoison_object().
  *
  * This function operates on all slab allocations including large kmalloc
- * allocations (the ones returned by kmalloc_large() or by kmalloc() with the
- * size > KMALLOC_MAX_SIZE).
+ * allocations (i.e. the ones backed directly by the buddy allocator rather
+ * than kmalloc slab caches).
  *
  * Return: true if the allocation can be safely reused; false otherwise.
  */
@@ -381,8 +381,8 @@ void __kasan_mempool_unpoison_object(void *ptr, size_t size, unsigned long ip);
  * original tags based on the pointer value.
  *
  * This function operates on all slab allocations including large kmalloc
- * allocations (the ones returned by kmalloc_large() or by kmalloc() with the
- * size > KMALLOC_MAX_SIZE).
+ * allocations (i.e. the ones backed directly by the buddy allocator rather
+ * than kmalloc slab caches).
  */
 static __always_inline void kasan_mempool_unpoison_object(void *ptr,
 							  size_t size)
-- 
2.25.1