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mm/nommu: convert kobjsize() to folios 

Simple folio conversion to remove a user of PageSlab() and PageCompound().

Link: https://lkml.kernel.org/r/20250804145117.3857308-1-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Jann Horn <jannh@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sidhartha Kumar 2025-08-04 14:51:17 +00:00 committed by Andrew Morton
parent 1738796994
commit 1097a3d456
1 changed files with 7 additions and 7 deletions
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14
mm/nommu.c
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@ -64,7 +64,7 @@ const struct vm_operations_struct generic_file_vm_ops = {
*/
unsigned int kobjsize(const void *objp)
{
struct page *page;
struct folio *folio;
/*
* If the object we have should not have ksize performed on it,
@ -73,22 +73,22 @@ unsigned int kobjsize(const void *objp)
if (!objp || !virt_addr_valid(objp))
return 0;
page = virt_to_head_page(objp);
folio = virt_to_folio(objp);
/*
* If the allocator sets PageSlab, we know the pointer came from
* kmalloc().
*/
if (PageSlab(page))
if (folio_test_slab(folio))
return ksize(objp);
/*
* If it's not a compound page, see if we have a matching VMA
* If it's not a large folio, see if we have a matching VMA
* region. This test is intentionally done in reverse order,
* so if there's no VMA, we still fall through and hand back
* PAGE_SIZE for 0-order pages.
* PAGE_SIZE for 0-order folios.
*/
if (!PageCompound(page)) {
if (!folio_test_large(folio)) {
struct vm_area_struct *vma;
vma = find_vma(current->mm, (unsigned long)objp);
@ -100,7 +100,7 @@ unsigned int kobjsize(const void *objp)
* The ksize() function is only guaranteed to work for pointers
* returned by kmalloc(). So handle arbitrary pointers here.
*/
return page_size(page);
return folio_size(folio);
}
void vfree(const void *addr)