CVS commit: src/sys/kern

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sat Oct  3 16:24:04 UTC 2026

Modified Files:
        src/sys/kern: sys_pipe.c

Log Message:
pipe(2): Simplify PIPE_RESTART handling.

Now that it applies to each side independently, we can just make it
final, because new I/O operations are not allowed on an file that has
had its .fo_restart called.  Makes reasoning about all this easier.

XXX Consider renaming PIPE_RESTART to PIPE_CLOSING: the .fo_restart
operation means the file is irreversibly destined to be closed soon
and just needs any pending I/O on it to be interrupted and fail
promptly so we can finally close the file.

Preparation for:

PR kern/59056: poll POLLHUP bugs


To generate a diff of this commit:
cvs rdiff -u -r1.172 -r1.173 src/sys/kern/sys_pipe.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.