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Because liveupdate FLB objects will soon drop their persistent module references when registered, list traversals must be protected against concurrent module unloading. To provide this protection, utilize the global luo_register_rwlock. It protects the global registry of FLBs and the handler's specific list of FLB dependencies. Read locks are used during concurrent list traversals (e.g., during preservation and serialization). Write locks are taken during registration and unregistration. Link: https://lore.kernel.org/20260327033335.696621-5-pasha.tatashin@soleen.com Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Reviewed-by: Pratyush Yadav (Google) <pratyush@kernel.org> Cc: David Matlack <dmatlack@google.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Samiullah Khawaja <skhawaja@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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