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buf: Add sysctl flag CTLFLAG_TUN to loader tunable

Description

buf: Add sysctl flag CTLFLAG_TUN to loader tunable

The sysctl variable 'vfs.unmapped_buf_allowed' is actually a loader
tunable. Add sysctl flag CTLFLAG_TUN to it so that sysctl -T will
report it correctly.

No functional change intended.

Reviewed by: kib, imp
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D42113

(cherry picked from commit 31b94065300a76e52c26b8caec7256574d64a777)

Details

Provenance
zleiAuthored on Oct 9 2023, 10:30 AM
Reviewer
kib
Differential Revision
D42113: Add sysctl flag CTLFLAG_TUN to loader tunables
Parents
rGe4f97a1ec798: sockets: Add sysctl flag CTLFLAG_TUN to loader tunable
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