Date: Mon, 7 Nov 2011 00:27:25 +0000 (UTC) From: Olivier Houchard <cognet@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r227289 - projects/armv6/sys/arm/arm Message-ID: <201111070027.pA70RPW3048940@svn.freebsd.org>
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Author: cognet Date: Mon Nov 7 00:27:25 2011 New Revision: 227289 URL: http://svn.freebsd.org/changeset/base/227289 Log: In pmap_modify_pv(), if we're removing the PVF_WRITE flag, don't forget to check if there's any writable mapping left for the page, and remove the PGA_WRITEABLE flag if there's not any. Modified: projects/armv6/sys/arm/arm/pmap-v6.c Modified: projects/armv6/sys/arm/arm/pmap-v6.c ============================================================================== --- projects/armv6/sys/arm/arm/pmap-v6.c Mon Nov 7 00:12:16 2011 (r227288) +++ projects/armv6/sys/arm/arm/pmap-v6.c Mon Nov 7 00:27:25 2011 (r227289) @@ -1103,6 +1103,16 @@ pmap_modify_pv(struct vm_page *pg, pmap_ else --pm->pm_stats.wired_count; } + if ((oflags & PVF_WRITE) && !(flags & PVF_WRITE)) { + TAILQ_FOREACH(npv, &pg->md.pv_list, pv_list) { + if (npv->pv_flags & PVF_WRITE) + break; + } + if (!npv) { + pg->md.pvh_attrs &= ~PVF_MOD; + vm_page_aflag_clear(pg, PGA_WRITEABLE); + } + } return (oflags); }
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