diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-10 11:38:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-10 11:38:01 +0300 |
| commit | adeab5bfb81840dc4be7ae20324bbf03b2b53eb2 (patch) | |
| tree | 2b56c0fad02af5c99e0a741cefc49dad5ba7384c /include/linux/mm.h | |
| parent | a2cf936ebef291ef7395172b9e2f624779fb6dc0 (diff) | |
| parent | dd5a440a31fae6e459c0d6271dddd62825505361 (diff) | |
| download | linux-adeab5bfb81840dc4be7ae20324bbf03b2b53eb2.tar.xz | |
Merge 6.9-rc7 into usb-next
We want the USB fixes in here as well, and resolve a merge conflict in
drivers/usb/dwc3/core.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 7b0ee64225de..b6bdaa18b9e9 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1223,14 +1223,16 @@ static inline void page_mapcount_reset(struct page *page) * a large folio, it includes the number of times this page is mapped * as part of that folio. * - * The result is undefined for pages which cannot be mapped into userspace. - * For example SLAB or special types of pages. See function page_has_type(). - * They use this field in struct page differently. + * Will report 0 for pages which cannot be mapped into userspace, eg + * slab, page tables and similar. */ static inline int page_mapcount(struct page *page) { int mapcount = atomic_read(&page->_mapcount) + 1; + /* Handle page_has_type() pages */ + if (mapcount < 0) + mapcount = 0; if (unlikely(PageCompound(page))) mapcount += folio_entire_mapcount(page_folio(page)); |