@@ -28,13 +28,20 @@ membarrier \- issue memory barriers on a set of threads
.SH SYNOPSIS
.nf
.PP
-.B #include <linux/membarrier.h>
+.BR "#include <linux/membarrier.h>" \
+" /* Definition of " MEMBARRIER_* " constants */"
+.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
+.B #include <unistd.h>
.PP
-.BI "int membarrier(int " cmd ", unsigned int " flags ", int " cpu_id );
+.BI "int syscall(SYS_membarrier, int " cmd ", unsigned int " flags \
+", int " cpu_id );
.fi
.PP
.IR Note :
-There is no glibc wrapper for this system call; see NOTES.
+glibc provides no wrapper for
+.BR membarrier (),
+necessitating the use of
+.BR syscall (2).
.SH DESCRIPTION
The
.BR membarrier ()
@@ -322,9 +329,6 @@ Examples where
.BR membarrier ()
can be useful include implementations
of Read-Copy-Update libraries and garbage collectors.
-.PP
-Glibc does not provide a wrapper for this system call; call it using
-.BR syscall (2).
.SH EXAMPLES
Assuming a multithreaded application where "fast_path()" is executed
very frequently, and where "slow_path()" is executed infrequently, the
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com> --- man2/membarrier.2 | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-)