LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

membarrier.2: Rework discussion of 'cmd' 

Simplify and eliminate some redundancy.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2015-12-15 16:23:11 +01:00
parent a93704ad50
commit 84015a2273
1 changed files with 6 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
man2/membarrier.2
View File

@ -75,8 +75,12 @@ argument is one of the following:
Query the set of supported commands. Query the set of supported commands.
The return value of the call is a bit mask of supported The return value of the call is a bit mask of supported
commands. commands.
.RB ( MEMBARRIER_CMD_QUERY .BR MEMBARRIER_CMD_QUERY ,
is not itself included included in this bit mask.) which has the value 0,
is not itself included in this bit mask.
This command is always supported (on kernels where
.BR membarrier ()
is provided).
.TP .TP
.B MEMBARRIER_CMD_SHARED .B MEMBARRIER_CMD_SHARED
Ensure that all threads from all processes on the system pass through a Ensure that all threads from all processes on the system pass through a
@ -85,15 +89,6 @@ order between entry to and return from the
.BR membarrier () .BR membarrier ()
system call. system call.
All threads on the system are targeted by this command. All threads on the system are targeted by this command.
.PP
The
.I cmd
argument expects a one-hot bit of a bit mask, except for the
.B MEMBARRIER_CMD_QUERY
command which has the value 0.
This query command is always supported,
even though it is not part of the bit mask.
.PP .PP
The The
.I flags .I flags