[PATCH v2] mm/slub: drop duplicate kernel-doc for ksize()

[PATCH v2] mm/slub: drop duplicate kernel-doc for ksize()

[Sanjay Chitroda]

From: Sanjay Chitroda <sanjayembeddedse@gmail.com>

The implementation of ksize() was updated with kernel-doc by commit
fab0694646d7 ("mm/slab: move [__]ksize and slab_ksize() to mm/slub.c")
However, the public header still contains a kernel-doc comment
attached to the ksize() prototype.

Having documentation both in the header and next to the implementation
causes Sphinx to treat the function as being documented twice,
resulting in the warning:

  WARNING: Duplicate C declaration, also defined at core-api/mm-api:521
  Declaration is '.. c:function:: size_t ksize(const void *objp)'

Kernel-doc guidelines recommend keeping the documentation with the
function implementation. Therefore remove the redundant kernel-doc
block from include/linux/slab.h so that the implementation in slub.c
remains the canonical source for documentation.

No functional change.

Fixes: fab0694646d7 ("mm/slab: move [__]ksize and slab_ksize() to mm/slub.c")
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
---
Changes in v2:
 - Instead of removing the doc comment from slub.c, remove it from the
   public header as suggested by reviewers.
 - Follow the guideline that kernel-doc should stay with the implementation.
 - Updated commit message accordingly.
 - Link to v1 https://lore.kernel.org/all/20260220124243.3264133-1-sanjayembedded@gmail.com/
---
 include/linux/slab.h | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index c5fde8740281..1c8c53b068b6 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -517,18 +517,6 @@ void kfree_sensitive(const void *objp);
 DEFINE_FREE(kfree, void *, if (!IS_ERR_OR_NULL(_T)) kfree(_T))
 DEFINE_FREE(kfree_sensitive, void *, if (_T) kfree_sensitive(_T))
 
-/**
- * ksize - Report actual allocation size of associated object
- *
- * @objp: Pointer returned from a prior kmalloc()-family allocation.
- *
- * This should not be used for writing beyond the originally requested
- * allocation size. Either use krealloc() or round up the allocation size
- * with kmalloc_size_roundup() prior to allocation. If this is used to
- * access beyond the originally requested allocation size, UBSAN_BOUNDS
- * and/or FORTIFY_SOURCE may trip, since they only know about the
- * originally allocated size via the __alloc_size attribute.
- */
 size_t ksize(const void *objp);
 
 #ifdef CONFIG_PRINTK
-- 
2.34.1