Zi Yan 9157259d16
mm: add pmd_t initializer __pmd() to work around a GCC bug. ...
THP migration is added but only supports x86_64 at the moment. For all
other architectures, swp_entry_to_pmd() only returns a zero pmd_t.
Due to a GCC zero initializer bug #53119 , the standard (pmd_t){0}
initializer is not accepted by all GCC versions. __pmd() is a feasible
workaround. In addition, sparc32's pmd_t is an array instead of a single
value, so we need (pmd_t){ {0}, } instead of (pmd_t){0}. Thus,
a different __pmd() definition is needed in sparc32.
Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu >
Signed-off-by: David S. Miller <davem@davemloft.net >
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9157259d16