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U2FsdGVkX1+41eKRQaTpwpChHQIL1JVm8mzPnfSG5epRlyh84Ap9KIGwZTMXRpQm2gn6BHcQpH6s9ErB3db+YNGomJlQW5jRDR1YnyCO8VPzb/Udgta1zMTmjVU2IswRbGwh5kOwGlsJqgIATLKvAioc8MVQozLOFYxE8xT6WajccykmCSpG53vz31Gu32B+s8RMXaV1p5RTH6/hXr3fAkqFjXzDgf7CfAOtgF4induqnmatNicH7vsjny3C8YINZXAAi4GQNxT5zFaRZSEBPxFgbOJOxlLe0FNwsWnYjNBNMtg9Pc3wsWNOYLR5ukXhWIRRm7q2m5NCu/5DXO8rZK7h2tDp5DCNfG1Xmz5bdbbVqaMJjNy5jTrRAUvvfi+F2g6uQbGqnTNpiM25g6YCHLzOYEif7NK4VMaRdyRMvP+simM6cFg3bge0aVFsj15xx1MMJx+h1HHe/sC2bYKRL2989Gdrgb2kKHIwNJwlpTat9GveVxS2avOMEH0VJpRCb9TQUaBenfpOYeDpwBgdWIJ7vwW/EuKieHt5EPV5NIcgqUQ+v1tg1CcbLkuIJXj6uGkihyUpiRRk+UBDbzEPDQeWel4EBSbVQ3uLdT6BEaaM3sAKHEjiF048J18LL7iGBlsZCPYkPx80qQ9QmZrW3zyLJmfn9gDbP/6Hr9eeHpHCU1Ere7FSJQmKiZZufEMi7Sq7LgsBbn6I98GU0Rgs4M3bCzFGKTkd8ETrDs9bzTecMlYE+aAB1wRdeoiVkGzMvgLWl/pgTARPrIFJAdbNo1gWyycu2utnvBm4lBbz3VrqQXHfv5HzJKN1StS0l4hMYkuEa5MaPaoo6BQmYo02BEUGe4SORdZT23E1V6rmbNv8Oe65g4e0z/eWCJJta4705DJwxEtG8GrATUkroFDZchVJ1Em5gymOSTYPdg+TpPHiTjY25K0oJP5Bv2IEWgQpak+3dZRqx4BRXArcM79 vsrOeBZw 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time assert in: >> r[2] = DEFINE_RANGE(clamp_t(s64, fault_idx - radius, pg.start, pg.end), >> clamp_t(s64, fault_idx + radius, pg.start, pg.end)); >> where it decides that pg.start > pg.end in: >> clamp_t(s64, fault_idx + radius, pg.start, pg.end)); >> where pg comes from: >> const struct range pg = DEFINE_RANGE(0, folio_nr_pages(folio) - 1); >> That does not seem like it could be true. Even for pg.start == pg.end, >> we would need folio_test_large() to evaluate to false at compile time: >> static inline unsigned long folio_nr_pages(const struct folio *folio) >> { >> if (!folio_test_large(folio)) >> return 1; >> return folio_large_nr_pages(folio); >> } >> Workaround by open coding the range computation. Also, simplify the type >> declarations for the relevant variables. >> Reported-by: kernel test robot >> Closes: https://lore.kernel.org/oe-kbuild-all/202601240453.QCjgGdJa-lkp@intel.com/ >> Signed-off-by: Ankur Arora >> --- >> Hi Andrew >> I'm not certain about linux-next rebasing protocol, but I'm guessing >> this patch will be squashed in patch-8 ("mm: folio_zero_user: cache >> neighbouring pages"). >> The commit message doesn't contain anything needing preserving if it is. >> Thanks >> Ankur >> mm/memory.c | 23 +++++++++++------------ >> 1 file changed, 11 insertions(+), 12 deletions(-) >> diff --git a/mm/memory.c b/mm/memory.c >> index ce933ee4a3dd..e49340f51fa9 100644 >> --- a/mm/memory.c >> +++ b/mm/memory.c >> @@ -7282,30 +7282,29 @@ static void clear_contig_highpages(struct page *page, unsigned long addr, >> void folio_zero_user(struct folio *folio, unsigned long addr_hint) >> { >> const unsigned long base_addr = ALIGN_DOWN(addr_hint, folio_size(folio)); >> - const long fault_idx = (addr_hint - base_addr) / PAGE_SIZE; >> const struct range pg = DEFINE_RANGE(0, folio_nr_pages(folio) - 1); >> - const int radius = FOLIO_ZERO_LOCALITY_RADIUS; >> + const long fault_idx = (addr_hint - base_addr) / PAGE_SIZE; >> + const long radius = FOLIO_ZERO_LOCALITY_RADIUS; >> struct range r[3]; >> int i; >> /* >> - * Faulting page and its immediate neighbourhood. Will be cleared at the >> - * end to keep its cachelines hot. >> + * Faulting page and its immediate neighbourhood. Cleared at the end to >> + * keep its cachelines hot. >> */ > > Why are there rather unrelated changes in this patch? Like this comment change, > or the movement of "fualt_idx" declaration above? Yeah, that was a mistake. -- ankur