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sysvshm: add shmobjinfo() function to find key/seq of the segment backed by obj

Description

sysvshm: add shmobjinfo() function to find key/seq of the segment backed by obj

(cherry picked from commit b72029589e64e04b8f9714ad8535b723276e2e02)

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Provenance
kibAuthored on Oct 5 2024, 9:14 AM
Parents
rG1ef669ae413e: vm_object: add OBJ_SYSVSHM flag to indicate SysV shm backing object
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