Date: Wed, 22 Oct 2008 16:50:13 +0000 (UTC) From: Robert Watson <rwatson@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r184168 - head/sys/vm Message-ID: <200810221650.m9MGoD7I033803@svn.freebsd.org>
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Author: rwatson Date: Wed Oct 22 16:50:12 2008 New Revision: 184168 URL: http://svn.freebsd.org/changeset/base/184168 Log: Update mmap() comment: no more block devices, so no more block device cache coherency questions. MFC after: 3 days Modified: head/sys/vm/vm_mmap.c Modified: head/sys/vm/vm_mmap.c ============================================================================== --- head/sys/vm/vm_mmap.c Wed Oct 22 15:43:28 2008 (r184167) +++ head/sys/vm/vm_mmap.c Wed Oct 22 16:50:12 2008 (r184168) @@ -187,10 +187,6 @@ ogetpagesize(td, uap) * memory-based, such as a video framebuffer, can be mmap'd. Otherwise * there would be no cache coherency between a descriptor and a VM mapping * both to the same character device. - * - * Block devices can be mmap'd no matter what they represent. Cache coherency - * is maintained as long as you do not write directly to the underlying - * character device. */ #ifndef _SYS_SYSPROTO_H_ struct mmap_args {
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