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| author |   Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-05-12 20:23:03 -0700 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2022-05-13 07:20:16 -0700 |
| commit | dc786690a6a1d9a680e6872821291ad7ca9f520d (patch) | |
| tree | 0b5fe3ef9eeea8dd0a520aa5acd7498e20df967e /include/linux/huge_mm.h | |
| parent | vmscan: convert the activate_locked portion of shrink_page_list to folios (diff) | |
| download | wireguard-linux-dc786690a6a1d9a680e6872821291ad7ca9f520d.tar.xz wireguard-linux-dc786690a6a1d9a680e6872821291ad7ca9f520d.zip | |
mm: allow can_split_folio() to be called when THP are disabled
The call to can_split_folio() in vmscan is currently guarded by a test of
PageTransHuge() so the BUILD_BUG() is eliminated if THP are disabled. The
next patch replaces that test with folio_test_large() which may be true,
even when THP are disabled. However, if THP are disabled, we cannot
split, so an unconditional return of false is appropriate.
Link: https://lkml.kernel.org/r/20220504182857.4013401-15-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/huge_mm.h')
| -rw-r--r-- | include/linux/huge_mm.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 9a26bd10e083..fbf36bb1be22 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -348,7 +348,6 @@ static inline void prep_transhuge_page(struct page *page) {} static inline bool can_split_folio(struct folio *folio, int *pextra_pins) { - BUILD_BUG(); return false; } static inline int |