Date: Sun, 8 Feb 2009 22:31:32 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r188349 - projects/releng_7_xen/sys/i386/xen Message-ID: <200902082231.n18MVWFu036825@svn.freebsd.org>
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Author: kmacy Date: Sun Feb 8 22:31:31 2009 New Revision: 188349 URL: http://svn.freebsd.org/changeset/base/188349 Log: don't touch page tables directly Modified: projects/releng_7_xen/sys/i386/xen/pmap.c Modified: projects/releng_7_xen/sys/i386/xen/pmap.c ============================================================================== --- projects/releng_7_xen/sys/i386/xen/pmap.c Sun Feb 8 22:17:24 2009 (r188348) +++ projects/releng_7_xen/sys/i386/xen/pmap.c Sun Feb 8 22:31:31 2009 (r188349) @@ -3664,14 +3664,17 @@ pmap_remove_write(vm_page_t m) retry: oldpte = *pte; if ((oldpte & PG_RW) != 0) { + vm_paddr_t newpte = oldpte & ~(PG_RW | PG_M); + /* * Regardless of whether a pte is 32 or 64 bits * in size, PG_RW and PG_M are among the least * significant 32 bits. */ - if (!atomic_cmpset_int((u_int *)pte, oldpte, - oldpte & ~(PG_RW | PG_M))) + PT_SET_VA_MA(pte, newpte, TRUE); + if (*pte != newpte) goto retry; + if ((oldpte & PG_M) != 0) vm_page_dirty(m); pmap_invalidate_page(pmap, pv->pv_va);
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