mm/slob: Remove unnecessary page_mapcount_reset() function call
authorHyeonggon Yoo <42.hyeyoo@gmail.com>
Sun, 12 Dec 2021 06:52:41 +0000 (06:52 +0000)
committerVlastimil Babka <vbabka@suse.cz>
Thu, 6 Jan 2022 11:27:28 +0000 (12:27 +0100)
commitb01af5c0b0414f96e6c3891e704d1c40faa18813
tree0ca12daa8bfedb0f814c63a647aac4a0498a74e9
parentc5e97ed154589524a1df4ae2be55c4cfdb0d0573
mm/slob: Remove unnecessary page_mapcount_reset() function call

After commit 401fb12c68c2 ("mm/sl*b: Differentiate struct slab fields by
sl*b implementations"), we can reorder fields of struct slab depending
on slab allocator.

For now, page_mapcount_reset() is called because page->_mapcount and
slab->units have same offset. But this is not necessary for struct slab.
Use unused field for units instead.

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Link: https://lore.kernel.org/r/20211212065241.GA886691@odroid
mm/slab.h
mm/slob.c