Print this page 
use NULL capable segop as a shorthand for no-capabilities
Instead of forcing every segment driver to implement a dummy "return 0"
function, handle NULL capable segop function pointer as "no copabilities
supported" shorthand.


2014 int
2015 segop_getmemid(struct seg *seg, caddr_t addr, memid_t *mp)
2016 {
2017         VERIFY3P(seg->s_ops->getmemid, !=, NULL);
2018 
2019         return (seg->s_ops->getmemid(seg, addr, mp));
2020 }
2021 
2022 struct lgrp_mem_policy_info *
2023 segop_getpolicy(struct seg *seg, caddr_t addr)
2024 {
2025         if (seg->s_ops->getpolicy == NULL)
2026                 return (NULL);
2027 
2028         return (seg->s_ops->getpolicy(seg, addr));
2029 }
2030 
2031 int
2032 segop_capable(struct seg *seg, segcapability_t cap)
2033 {
2034         VERIFY3P(seg->s_ops->capable, !=, NULL);

2035 
2036         return (seg->s_ops->capable(seg, cap));
2037 }
2038 
2039 int
2040 segop_inherit(struct seg *seg, caddr_t addr, size_t len, uint_t op)
2041 {
2042         if (seg->s_ops->inherit == NULL)
2043                 return (ENOTSUP);
2044 
2045         return (seg->s_ops->inherit(seg, addr, len, op));
2046 }



2014 int
2015 segop_getmemid(struct seg *seg, caddr_t addr, memid_t *mp)
2016 {
2017         VERIFY3P(seg->s_ops->getmemid, !=, NULL);
2018 
2019         return (seg->s_ops->getmemid(seg, addr, mp));
2020 }
2021 
2022 struct lgrp_mem_policy_info *
2023 segop_getpolicy(struct seg *seg, caddr_t addr)
2024 {
2025         if (seg->s_ops->getpolicy == NULL)
2026                 return (NULL);
2027 
2028         return (seg->s_ops->getpolicy(seg, addr));
2029 }
2030 
2031 int
2032 segop_capable(struct seg *seg, segcapability_t cap)
2033 {
2034         if (seg->s_ops->capable == NULL)
2035                 return (0);
2036 
2037         return (seg->s_ops->capable(seg, cap));
2038 }
2039 
2040 int
2041 segop_inherit(struct seg *seg, caddr_t addr, size_t len, uint_t op)
2042 {
2043         if (seg->s_ops->inherit == NULL)
2044                 return (ENOTSUP);
2045 
2046         return (seg->s_ops->inherit(seg, addr, len, op));
2047 }