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author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-17 14:27:39 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-17 14:27:39 -0800 |
commit | 35010334aa007480a833401b80922299cb1a15ef (patch) | |
tree | 6e318eb89da45d37ea8dceddd1ae6858b74dee1e /arch/x86/mm/pageattr.c | |
parent | 8ce9a75a307e142a8871c649627555e0e4a1eefb (diff) | |
parent | be716615fe596ee117292dc615e95f707fb67fd1 (diff) | |
download | op-kernel-dev-35010334aa007480a833401b80922299cb1a15ef.zip op-kernel-dev-35010334aa007480a833401b80922299cb1a15ef.tar.gz |
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, vm86: fix preemption bug
x86, olpc: fix model detection without OFW
x86, hpet: fix for LS21 + HPET = boot hang
x86: CPA avoid repeated lazy mmu flush
x86: warn if arch_flush_lazy_mmu_cpu is called in preemptible context
x86/paravirt: make arch_flush_lazy_mmu/cpu disable preemption
x86, pat: fix warn_on_once() while mapping 0-1MB range with /dev/mem
x86/cpa: make sure cpa is safe to call in lazy mmu mode
x86, ptrace, mm: fix double-free on race
Diffstat (limited to 'arch/x86/mm/pageattr.c')
-rw-r--r-- | arch/x86/mm/pageattr.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 84ba748..8ca0d85 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -575,7 +575,6 @@ static int __change_page_attr(struct cpa_data *cpa, int primary) address = cpa->vaddr[cpa->curpage]; else address = *cpa->vaddr; - repeat: kpte = lookup_address(address, &level); if (!kpte) @@ -812,6 +811,13 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages, vm_unmap_aliases(); + /* + * If we're called with lazy mmu updates enabled, the + * in-memory pte state may be stale. Flush pending updates to + * bring them up to date. + */ + arch_flush_lazy_mmu_mode(); + cpa.vaddr = addr; cpa.numpages = numpages; cpa.mask_set = mask_set; @@ -854,6 +860,13 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages, } else cpa_flush_all(cache); + /* + * If we've been called with lazy mmu updates enabled, then + * make sure that everything gets flushed out before we + * return. + */ + arch_flush_lazy_mmu_mode(); + out: return ret; } |