Date: Sat, 30 Oct 2010 17:21:32 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r214563 - head/sys/amd64/amd64 Message-ID: <201010301721.o9UHLWCe007732@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: alc Date: Sat Oct 30 17:21:32 2010 New Revision: 214563 URL: http://svn.freebsd.org/changeset/base/214563 Log: Don't demote in pmap_demote_DMAP() if the specified length is zero. Modified: head/sys/amd64/amd64/pmap.c Modified: head/sys/amd64/amd64/pmap.c ============================================================================== --- head/sys/amd64/amd64/pmap.c Sat Oct 30 16:53:42 2010 (r214562) +++ head/sys/amd64/amd64/pmap.c Sat Oct 30 17:21:32 2010 (r214563) @@ -4968,6 +4968,11 @@ pmap_demote_DMAP(vm_paddr_t base, vm_siz vm_offset_t va; boolean_t changed; + if (len == 0) + return; + KASSERT(powerof2(len), ("pmap_demote_DMAP: len is not a power of 2")); + KASSERT((base & (len - 1)) == 0, + ("pmap_demote_DMAP: base is not a multiple of len")); if (len < NBPDP) { va = PHYS_TO_DMAP(base); changed = FALSE;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201010301721.o9UHLWCe007732>