Date: Wed, 17 Oct 2012 11:30:26 +0000 (UTC) From: Andriy Gapon <avg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r241638 - stable/8/sys/kern Message-ID: <201210171130.q9HBUQg7060435@svn.freebsd.org>
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Author: avg Date: Wed Oct 17 11:30:25 2012 New Revision: 241638 URL: http://svn.freebsd.org/changeset/base/241638 Log: MFC r241295: cngetc: use cpu_spinwait to ease the cncheckc loop a tiny bit Modified: stable/8/sys/kern/kern_cons.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/kern/ (props changed) Modified: stable/8/sys/kern/kern_cons.c ============================================================================== --- stable/8/sys/kern/kern_cons.c Wed Oct 17 11:30:14 2012 (r241637) +++ stable/8/sys/kern/kern_cons.c Wed Oct 17 11:30:25 2012 (r241638) @@ -353,7 +353,7 @@ cngetc(void) if (cn_mute) return (-1); while ((c = cncheckc()) == -1) - ; + cpu_spinwait(); if (c == '\r') c = '\n'; /* console input is always ICRNL */ return (c);
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