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 XXdVdHqF 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VMA flags by bit") significantly changed > how VMA flags are declared, utilising an enum of VMA bit values and > ifdef-fery VM_xxx flag declarations via macro. > > As part of this change, it uses INIT_VM_FLAG() to define VM_xxx flags from > the newly introduced VMA bit numbers. > > However, use of this macro results in apparently unfortunate macro > expansion and resulted in a performance degradation.This appears to be due > to the (__force int), which is required for the sparse typechecking to > work. > > Avoid macro expansion issues by simply using 1UL << bitnum. > > Reported-by: kernel test robot > Closes: https://lore.kernel.org/oe-lkp/202512041634.150c7e4f-lkp@intel.com > Signed-off-by: Lorenzo Stoakes Sorry forget to add Fixes tag... :) Please update with that also when the PR is upstream apologies :P > --- > > Andrew - note I've referenced the linux-next commit number above, could you > replace with the upstream commit hash once your PR is taken? Thanks! > > include/linux/mm.h | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index a2f38fb68840..c4438b30c140 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -395,7 +395,8 @@ enum { > #undef DECLARE_VMA_BIT > #undef DECLARE_VMA_BIT_ALIAS > > -#define INIT_VM_FLAG(name) BIT((__force int) VMA_ ## name ## _BIT) > +#define INIT_VM_FLAG(name) (1UL << (__force int)(VMA_ ## name ## _BIT)) > + > #define VM_READ INIT_VM_FLAG(READ) > #define VM_WRITE INIT_VM_FLAG(WRITE) > #define VM_EXEC INIT_VM_FLAG(EXEC) > -- > 2.52.0 Cheers, Lorenzo