Date: Sat, 6 Oct 2012 19:50:23 +0000 (UTC) From: Andriy Gapon <avg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r241295 - head/sys/kern Message-ID: <201210061950.q96JoNIk028911@svn.freebsd.org>
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Author: avg Date: Sat Oct 6 19:50:23 2012 New Revision: 241295 URL: http://svn.freebsd.org/changeset/base/241295 Log: cngetc: use cpu_spinwait to ease the cncheckc loop a tiny bit Reviewed by: julian MFC after: 10 days Modified: head/sys/kern/kern_cons.c Modified: head/sys/kern/kern_cons.c ============================================================================== --- head/sys/kern/kern_cons.c Sat Oct 6 19:48:15 2012 (r241294) +++ head/sys/kern/kern_cons.c Sat Oct 6 19:50:23 2012 (r241295) @@ -384,7 +384,7 @@ 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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