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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-10-04 14:45:55 +0100 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2022-01-06 12:25:51 +0100 |
| commit | 7213230af5e1e83ff010b3448260b9d3f95dd036 (patch) | |
| tree | 79628e326fb516cf2e2a513b88781df7e1427e0e /mm/slab_common.c | |
| parent | 0c24811b12ba29a6881e8ec0d01ad3f3b091da02 (diff) | |
| download | linux-7213230af5e1e83ff010b3448260b9d3f95dd036.tar.gz linux-7213230af5e1e83ff010b3448260b9d3f95dd036.tar.bz2 linux-7213230af5e1e83ff010b3448260b9d3f95dd036.zip | |
mm: Use struct slab in kmem_obj_info()
All three implementations of slab support kmem_obj_info() which reports
details of an object allocated from the slab allocator. By using the
slab type instead of the page type, we make it obvious that this can
only be called for slabs.
[ vbabka@suse.cz: also convert the related kmem_valid_obj() to folios ]
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Roman Gushchin <guro@fb.com>
Diffstat (limited to 'mm/slab_common.c')
| -rw-r--r-- | mm/slab_common.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index e5d080a93009..dc15566141d4 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -550,13 +550,13 @@ bool slab_is_available(void) */ bool kmem_valid_obj(void *object) { - struct page *page; + struct folio *folio; /* Some arches consider ZERO_SIZE_PTR to be a valid address. */ if (object < (void *)PAGE_SIZE || !virt_addr_valid(object)) return false; - page = virt_to_head_page(object); - return PageSlab(page); + folio = virt_to_folio(object); + return folio_test_slab(folio); } EXPORT_SYMBOL_GPL(kmem_valid_obj); @@ -579,18 +579,18 @@ void kmem_dump_obj(void *object) { char *cp = IS_ENABLED(CONFIG_MMU) ? "" : "/vmalloc"; int i; - struct page *page; + struct slab *slab; unsigned long ptroffset; struct kmem_obj_info kp = { }; if (WARN_ON_ONCE(!virt_addr_valid(object))) return; - page = virt_to_head_page(object); - if (WARN_ON_ONCE(!PageSlab(page))) { + slab = virt_to_slab(object); + if (WARN_ON_ONCE(!slab)) { pr_cont(" non-slab memory.\n"); return; } - kmem_obj_info(&kp, object, page); + kmem_obj_info(&kp, object, slab); if (kp.kp_slab_cache) pr_cont(" slab%s %s", cp, kp.kp_slab_cache->name); else |